A/T System Symptom Troubleshooting (R18A: A/T)

A/T System Symptom Troubleshooting

Symptom Probable cause(s) Notes
When you turn the ignition switch ON (II), the D indicator comes on and stays on in all shift lever positions, or it never comes on at all
F-CAN communication line error
Gauge control module defective
PCM defective

Check the F-CAN communication line for a DTC.
Check indicator drive circuit in the gauge control module by gauge control module self-diagnostic function.

A/T gear position indicator does not come on while the shift lever is in that position
F-CAN communication line error
Gauge control module defective
PCM defective
Transmission range switch defective

Check the F-CAN communication line for a DTC.
Check indicator drive circuit in the gauge control module by gauge control module self-diagnostic function.
Inspect the transmission range switch.

Shift indicator does not work - 5-position
F-CAN communication line error
Gauge control module defective
PCM defective

Check the F-CAN communication line for a DTC.
Test the shift lock solenoid.
Inspect the transmission range switch.

When you press the steering wheel upshift (+) switch in S, the transmission does not upshift gears - 5-position A problem in the steering wheel upshift (+) switch circuit Check the steering wheel upshift (+) switch circuit.
When you press the steering wheel downshift (-) switch in S, the transmission does not downshift gears - 5-position A problem in the steering wheel downshift (-) switch circuit Check the steering wheel downshift (-) switch circuit.

Symptom	Probable cause(s)	Notes
When you turn the ignition switch ON (II), the D indicator comes on and stays on in all shift lever positions, or it never comes on at all	F-CAN communication line error Gauge control module defective PCM defective	Check the F-CAN communication line for a DTC. Check indicator drive circuit in the gauge control module by gauge control module self-diagnostic function.
A/T gear position indicator does not come on while the shift lever is in that position	F-CAN communication line error Gauge control module defective PCM defective Transmission range switch defective	Check the F-CAN communication line for a DTC. Check indicator drive circuit in the gauge control module by gauge control module self-diagnostic function. Inspect the transmission range switch.
Shift indicator does not work - 5-position	F-CAN communication line error Gauge control module defective PCM defective	Check the F-CAN communication line for a DTC. Test the shift lock solenoid. Inspect the transmission range switch.
When you press the steering wheel upshift (+) switch in S, the transmission does not upshift gears - 5-position	A problem in the steering wheel upshift (+) switch circuit	Check the steering wheel upshift (+) switch circuit.
When you press the steering wheel downshift (-) switch in S, the transmission does not downshift gears - 5-position	A problem in the steering wheel downshift (-) switch circuit	Check the steering wheel downshift (-) switch circuit.

Symptom Probable cause(s) Notes
Shift lever cannot be moved from P position while you are pushing on the brake pedal
Shift lock solenoid defective
Shift lock solenoid control circuit
Shift lock mechanism defective
Brake switch circuit
Brake switch defective
Accelerator pedal position sensor circuit
Accelerator pedal position sensor defective
Throttle body defective
Transmission range switch ATP P switch stuck OFF
Transmission range switch ATP P switch line opened

Troubleshoot the shift lock system circuit.
Test the shift lock solenoid.
Inspect the transmission range switch.

Ignition switch cannot be moved from ACC (I) position to LOCK (0) position (key is pushed in, shift lever in P)
Interlock control system circuit
Key interlock solenoid stuck ON
Park pin switch stuck OFF
Transmission range switch

Troubleshoot the key interlock system circuit.
Inspect the transmission range switch.

HDS does not communicate with the PCM or the vehicle DLC circuit error Troubleshoot the DLC circuit.

Symptom	Probable cause(s)	Notes
Shift lever cannot be moved from P position while you are pushing on the brake pedal	Shift lock solenoid defective Shift lock solenoid control circuit Shift lock mechanism defective Brake switch circuit Brake switch defective Accelerator pedal position sensor circuit Accelerator pedal position sensor defective Throttle body defective Transmission range switch ATP P switch stuck OFF Transmission range switch ATP P switch line opened	Troubleshoot the shift lock system circuit. Test the shift lock solenoid. Inspect the transmission range switch.
Ignition switch cannot be moved from ACC (I) position to LOCK (0) position (key is pushed in, shift lever in P)	Interlock control system circuit Key interlock solenoid stuck ON Park pin switch stuck OFF Transmission range switch	Troubleshoot the key interlock system circuit. Inspect the transmission range switch.
HDS does not communicate with the PCM or the vehicle	DLC circuit error	Troubleshoot the DLC circuit.

Symptom Probable cause(s) Notes
Engine runs, but vehicle does not move in any gear 1.
2.

3.

4.
5.

6.
7.
8.
9.

10. Low ATF level
Shift cable broken or out of adjustment
Connection between shift cable and transmission or body is worn
ATF pump worn or binding
Regulator valve stuck or spring worn
ATF strainer clogged
Mainshaft worn or damaged
Final gears worn or damaged
Transmission-to-engine assembly error
Axle disengaged
Check the ATF level, and check the ATF cooler lines for leakage and loose connections. If necessary, clean the ATF cooler lines.
Check for a loose shift cable at the shift lever and the transmission control lever.
Check for a stored DTC, and check for loose connections.
Check the line pressure.
Improper alignment of ATF pump and torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
Be careful not to damage the torque converter housing when replacing the main ball bearing. You may also damage the ATF pump when you torque down the main valve body. This will result in ATF pump seizure.
Install the main seal flush with the torque converter housing when replacing the main seal. If you push it into the torque converter housing until it bottoms out, it will block the fluid return passage and result in damage.
Check the ATF strainer for debris. If the strainer is clogged, find the damaged components that caused the debris.
Inspect the differential pinion gears for wear. If the differential pinion gears are worn, replace the differential assembly, replace the ATF strainer, thoroughly clean the transmission, and clean the ATF cooler and cooler lines.
Replace the torque converter.
Inspect the countershaft and secondary shaft for wear and damage.

Symptom	Probable cause(s)	Notes
Engine runs, but vehicle does not move in any gear	1. 2. 3. 4. 5. 6. 7. 8. 9. 10.	Low ATF level Shift cable broken or out of adjustment Connection between shift cable and transmission or body is worn ATF pump worn or binding Regulator valve stuck or spring worn ATF strainer clogged Mainshaft worn or damaged Final gears worn or damaged Transmission-to-engine assembly error Axle disengaged	Check the ATF level, and check the ATF cooler lines for leakage and loose connections. If necessary, clean the ATF cooler lines. Check for a loose shift cable at the shift lever and the transmission control lever. Check for a stored DTC, and check for loose connections. Check the line pressure. Improper alignment of ATF pump and torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak. Be careful not to damage the torque converter housing when replacing the main ball bearing. You may also damage the ATF pump when you torque down the main valve body. This will result in ATF pump seizure. Install the main seal flush with the torque converter housing when replacing the main seal. If you push it into the torque converter housing until it bottoms out, it will block the fluid return passage and result in damage. Check the ATF strainer for debris. If the strainer is clogged, find the damaged components that caused the debris. Inspect the differential pinion gears for wear. If the differential pinion gears are worn, replace the differential assembly, replace the ATF strainer, thoroughly clean the transmission, and clean the ATF cooler and cooler lines. Replace the torque converter. Inspect the countershaft and secondary shaft for wear and damage.

Symptom Probable cause(s) Notes
Vehicle moves in 2 and R, but not in D, D3, S, and 1 1.
2.
3. 1st accumulator defective
1st gears worn or damaged
1st clutch defective
Inspect the 1st accumulator piston, O-ring, and spring for wear and damage in the servo body.
Inspect the countershaft, secondary shaft, and 1st clutch for wear and damage.
Check the 1st clutch pressure.
Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clutch end-plate-to-top-disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch waved-plate height. If the discs and plates are worn or damaged, replace them as a set. If the waved-plate height is out of tolerance, replace the waved-plate. If they are OK, adjust the clearance with the clutch end-plate.

Vehicle moves in D, 1, and R, but not in 2, in 2nd in S 1.
2.
3. 2nd accumulator defective
2nd gears worn or damaged
2nd clutch defective
Inspect the 2nd accumulator piston, O-ring, and spring for wear and damaged in the servo body.
Check the 2nd clutch pressure.
Inspect the countershaft, secondary shaft, and 2nd clutch for wear and damage.
Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clutch end-plate-to-top-disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch waved-plate height. If the discs and plates are worn or damaged, replace them as a set. If the waved-plate height is out of tolerance, replace the waved-plate. If they are OK, adjust the clearance with the clutch end-plate.
Inspect the 2nd clutch feed pipe. If the 2nd clutch feed pipe is scored, replace the end cover.
Replace the secondary shaft if the bushing for the 2nd clutch feed pipe is loose or damaged.

Symptom	Probable cause(s)	Notes
Vehicle moves in 2 and R, but not in D, D3, S, and 1	1. 2. 3.	1st accumulator defective 1st gears worn or damaged 1st clutch defective	Inspect the 1st accumulator piston, O-ring, and spring for wear and damage in the servo body. Inspect the countershaft, secondary shaft, and 1st clutch for wear and damage. Check the 1st clutch pressure. Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clutch end-plate-to-top-disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch waved-plate height. If the discs and plates are worn or damaged, replace them as a set. If the waved-plate height is out of tolerance, replace the waved-plate. If they are OK, adjust the clearance with the clutch end-plate.
Vehicle moves in D, 1, and R, but not in 2, in 2nd in S	1. 2. 3.	2nd accumulator defective 2nd gears worn or damaged 2nd clutch defective	Inspect the 2nd accumulator piston, O-ring, and spring for wear and damaged in the servo body. Check the 2nd clutch pressure. Inspect the countershaft, secondary shaft, and 2nd clutch for wear and damage. Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clutch end-plate-to-top-disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch waved-plate height. If the discs and plates are worn or damaged, replace them as a set. If the waved-plate height is out of tolerance, replace the waved-plate. If they are OK, adjust the clearance with the clutch end-plate. Inspect the 2nd clutch feed pipe. If the 2nd clutch feed pipe is scored, replace the end cover. Replace the secondary shaft if the bushing for the 2nd clutch feed pipe is loose or damaged.

Symptom Probable cause(s) Notes
Vehicle moves in D, D3, S, 2, and 1, but not in R 1.
2.
3.
4.
5.
6. Shift solenoid valve D defective
Shift fork shaft stuck
Shift valve D defective
5th/reverse accumulator defective
5th clutch defective
Reverse gears worn or damaged
Check for a stored DTC, and check for loose connections.
Test the shift solenoid valve function with the HDS.
Inspect the O-rings, and check the shift solenoid valve seizure.
Check for a missing shift fork bolt on the shift fork shaft.
Inspect the servo valve O-ring.
Check the shift fork shaft detent for wear and damage.
Inspect the 5th accumulator piston, O-ring, and spring for wear and damage in the servo body.
Check the 5th clutch pressure.
Inspect the mainshaft and 5th clutch for wear and damage.
Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clutch end-plate-to-top-disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch waved-plate height. If the discs and plates are worn or damaged, replace them as a set. If the waved-plate height is out of tolerance, replace the waved-plate. If they are OK, adjust the clearance with the clutch end-plate.
Inspect the reverse selector gear teeth chamfers, and inspect the engagement teeth chamfers of the countershaft 5th gear and reverse gear. Replace the reverse gears and the reverse selector if they are worn or damaged. If the transmission makes clicking, grinding, whirring noise, also replace the mainshaft 5th gear, reverse idler gear, and countershaft 5th gear.

Poor acceleration 1.
2.
3. Shift solenoid valve A defective
Shift solenoid valve B defective
Shift solenoid valve C defective
Check for a stored DTC, and check for loose connections.
Test the shift solenoid valve function with the HDS.

Symptom	Probable cause(s)	Notes
Vehicle moves in D, D3, S, 2, and 1, but not in R	1. 2. 3. 4. 5. 6.	Shift solenoid valve D defective Shift fork shaft stuck Shift valve D defective 5th/reverse accumulator defective 5th clutch defective Reverse gears worn or damaged	Check for a stored DTC, and check for loose connections. Test the shift solenoid valve function with the HDS. Inspect the O-rings, and check the shift solenoid valve seizure. Check for a missing shift fork bolt on the shift fork shaft. Inspect the servo valve O-ring. Check the shift fork shaft detent for wear and damage. Inspect the 5th accumulator piston, O-ring, and spring for wear and damage in the servo body. Check the 5th clutch pressure. Inspect the mainshaft and 5th clutch for wear and damage. Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clutch end-plate-to-top-disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch waved-plate height. If the discs and plates are worn or damaged, replace them as a set. If the waved-plate height is out of tolerance, replace the waved-plate. If they are OK, adjust the clearance with the clutch end-plate. Inspect the reverse selector gear teeth chamfers, and inspect the engagement teeth chamfers of the countershaft 5th gear and reverse gear. Replace the reverse gears and the reverse selector if they are worn or damaged. If the transmission makes clicking, grinding, whirring noise, also replace the mainshaft 5th gear, reverse idler gear, and countershaft 5th gear.
Poor acceleration	1. 2. 3.	Shift solenoid valve A defective Shift solenoid valve B defective Shift solenoid valve C defective	Check for a stored DTC, and check for loose connections. Test the shift solenoid valve function with the HDS.

Symptom Probable cause(s) Notes
Poor acceleration; flares when starting off in D, D3, S, and R; stall speed high in 2, 1, and in D, D3 (in 1st and 2nd), and in 1st and 2nd in S 1.
2.

3.
4.

5.
6. Low ATF level
Shift cable broken or out of adjustment
ATF pump worn or binding
Regulator valve stuck or spring worn
ATF strainer clogged
Torque converter check valve defective
Check the ATF level and check the ATF lines for leakage and loose connections. If necessary, clean the ATF lines.
Check for a loose shift cable at the shift lever and the transmission control lever.
Check the line pressure.
Improper alignment of ATF pump and torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
Be careful not to damage the torque converter housing when replacing the main ball bearing. You may also damage the ATF pump when you torque down the main valve body. This will result in ATF pump seizure.
Install the main seal flush with the torque converter housing when replacing the main seal. If you push it into the torque converter housing until it bottoms out, it will block the fluid return passage and result in damage.
Check the ATF strainer for debris. If the strainer is clogged, find the damaged components that caused the debris.
Inspect the differential pinion gears for wear. If the differential pinion gears are worn, replace the differential assembly, replace the ATF strainer, thoroughly clean the transmission, and clean the ATF warmer and ATF lines.
Replace the torque converter.

Poor acceleration; flares when starting off in D, D3, S, and R; stall speed high when starting off in 2, and in 2nd in S 2nd clutch defective
Check the 2nd clutch pressure.
Inspect the secondary shaft and 2nd clutch for wear and damage.
Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clutch end-plate-to-top-disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch waved-plate height. If the discs and plates are worn or damaged, replace them as a set. If the waved-plate height is out of tolerance, replace the waved-plate. If they are OK, adjust the clearance with the clutch end-plate.
Inspect the 2nd clutch feed pipe. If the 2nd clutch feed pipe is scored, replace the end cover.
Replace the secondary shaft if the bushing for the 2nd clutch feed pipe is loose or damaged.

Symptom	Probable cause(s)	Notes
Poor acceleration; flares when starting off in D, D3, S, and R; stall speed high in 2, 1, and in D, D3 (in 1st and 2nd), and in 1st and 2nd in S	1. 2. 3. 4. 5. 6.	Low ATF level Shift cable broken or out of adjustment ATF pump worn or binding Regulator valve stuck or spring worn ATF strainer clogged Torque converter check valve defective	Check the ATF level and check the ATF lines for leakage and loose connections. If necessary, clean the ATF lines. Check for a loose shift cable at the shift lever and the transmission control lever. Check the line pressure. Improper alignment of ATF pump and torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak. Be careful not to damage the torque converter housing when replacing the main ball bearing. You may also damage the ATF pump when you torque down the main valve body. This will result in ATF pump seizure. Install the main seal flush with the torque converter housing when replacing the main seal. If you push it into the torque converter housing until it bottoms out, it will block the fluid return passage and result in damage. Check the ATF strainer for debris. If the strainer is clogged, find the damaged components that caused the debris. Inspect the differential pinion gears for wear. If the differential pinion gears are worn, replace the differential assembly, replace the ATF strainer, thoroughly clean the transmission, and clean the ATF warmer and ATF lines. Replace the torque converter.
Poor acceleration; flares when starting off in D, D3, S, and R; stall speed high when starting off in 2, and in 2nd in S	2nd clutch defective	Check the 2nd clutch pressure. Inspect the secondary shaft and 2nd clutch for wear and damage. Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clutch end-plate-to-top-disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch waved-plate height. If the discs and plates are worn or damaged, replace them as a set. If the waved-plate height is out of tolerance, replace the waved-plate. If they are OK, adjust the clearance with the clutch end-plate. Inspect the 2nd clutch feed pipe. If the 2nd clutch feed pipe is scored, replace the end cover. Replace the secondary shaft if the bushing for the 2nd clutch feed pipe is loose or damaged.

Symptom Probable cause(s) Notes
Poor acceleration; flares when starting off in D, D3, S, and R; stall speed high in R 1.

2. Shift cable broken or out of adjustment
5th clutch defective
Check for a loose shift cable at the shift lever and the transmission control lever.
Check the 5th clutch pressure.
Inspect the mainshaft and 5th clutch for wear and damage.
Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clutch end-plate-to-top-disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch waved-plate height. If the discs and plates are worn or damaged, replace them as a set. If the waved-plate height is out of tolerance, replace the waved-plate. If they are OK, adjust the clearance with the clutch end-plate.

Poor acceleration; stall speed low in 2, 1, and in D, D3 (in 1st and 2nd), and S (in 1st and 2nd) 1.
2.

3.
4.

5. Shift solenoid valve D defective
Torque converter one-way clutch defective
Engine output low
Torque converter clutch piston defective
Lock-up shift valve defective
Check for a stored DTC, and check for loose connections.
Test the shift solenoid valve function with the HDS.
Inspect the O-rings, and check the shift solenoid valve seizure.
Replace the torque converter assembly.
Check the lock-up shift valve in the regulator valve body.
Check the engine control system.

Poor acceleration; stall speed low in R 1.
2.

3. Engine output low
Torque converter clutch piston defective
Lock-up shift valve defective
Check the engine control system.
Replace the torque converter assembly.
Check the lock-up shift valve in the regulator valve body.

Symptom	Probable cause(s)	Notes
Poor acceleration; flares when starting off in D, D3, S, and R; stall speed high in R	1. 2.	Shift cable broken or out of adjustment 5th clutch defective	Check for a loose shift cable at the shift lever and the transmission control lever. Check the 5th clutch pressure. Inspect the mainshaft and 5th clutch for wear and damage. Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clutch end-plate-to-top-disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch waved-plate height. If the discs and plates are worn or damaged, replace them as a set. If the waved-plate height is out of tolerance, replace the waved-plate. If they are OK, adjust the clearance with the clutch end-plate.
Poor acceleration; stall speed low in 2, 1, and in D, D3 (in 1st and 2nd), and S (in 1st and 2nd)	1. 2. 3. 4. 5.	Shift solenoid valve D defective Torque converter one-way clutch defective Engine output low Torque converter clutch piston defective Lock-up shift valve defective	Check for a stored DTC, and check for loose connections. Test the shift solenoid valve function with the HDS. Inspect the O-rings, and check the shift solenoid valve seizure. Replace the torque converter assembly. Check the lock-up shift valve in the regulator valve body. Check the engine control system.
Poor acceleration; stall speed low in R	1. 2. 3.	Engine output low Torque converter clutch piston defective Lock-up shift valve defective	Check the engine control system. Replace the torque converter assembly. Check the lock-up shift valve in the regulator valve body.

Symptom Probable cause(s) Notes
Engine idle vibration 1.
2.
3.

4.
5.

6.
7.
8. Low ATF level
Shift solenoid valve D defective
Drive plate defective or transmission misassembled
Engine output low
Torque converter clutch piston defective
ATF pump worn or damaged
Lock-up shift valve defective
Misassembled engine and transmission mount
Check the ATF level and check the ATF lines for leakage and loose connections. If necessary, clean the ATF lines.
Check for a stored DTC, and check for loose connections.
Test the shift solenoid valve function with the HDS.
Inspect the O-rings, and check the shift solenoid valve seizure.
Check transmission and drive plate installation.
Check the drive plate for wear and damage, if the drive plate is worn or damaged, replace the drive plate.
Check the engine control system.
Replace the torque converter assembly.
Check the line pressure.
Improper alignment of ATF pump and torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
Be careful not to damage the torque converter housing when replacing the main ball bearing. You may also damage the ATF pump when you torque down the main valve body. This will result in ATF pump seizure.
Install the main seal flush with the torque converter housing when replacing the main seal. If you push it into the torque converter housing until it bottoms out, it will block the fluid return passage and result in damage.
Check the lock-up shift valve in the regulator valve body.
Adjust the transmission and engine mounts by loosening and retightening the mount bolts.

Symptom	Probable cause(s)	Notes
Engine idle vibration	1. 2. 3. 4. 5. 6. 7. 8.	Low ATF level Shift solenoid valve D defective Drive plate defective or transmission misassembled Engine output low Torque converter clutch piston defective ATF pump worn or damaged Lock-up shift valve defective Misassembled engine and transmission mount	Check the ATF level and check the ATF lines for leakage and loose connections. If necessary, clean the ATF lines. Check for a stored DTC, and check for loose connections. Test the shift solenoid valve function with the HDS. Inspect the O-rings, and check the shift solenoid valve seizure. Check transmission and drive plate installation. Check the drive plate for wear and damage, if the drive plate is worn or damaged, replace the drive plate. Check the engine control system. Replace the torque converter assembly. Check the line pressure. Improper alignment of ATF pump and torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak. Be careful not to damage the torque converter housing when replacing the main ball bearing. You may also damage the ATF pump when you torque down the main valve body. This will result in ATF pump seizure. Install the main seal flush with the torque converter housing when replacing the main seal. If you push it into the torque converter housing until it bottoms out, it will block the fluid return passage and result in damage. Check the lock-up shift valve in the regulator valve body. Adjust the transmission and engine mounts by loosening and retightening the mount bolts.

Symptom Probable cause(s) Notes
Vehicle moves in N 1.
2.

3.
4.
5.
6.
7.
8.
9.

10.

11. Excessive ATF
Foreign material in separator plate orifice
Relief valve defective
1st clutch defective
2nd clutch defective
3rd clutch defective
4th clutch defective
5th clutch defective
Clutch end-plate-to-top-disc clearance incorrect
Needle bearing seized, worn, or damaged
Thrust washer seized, worn, or damaged
Check the ATF level, and drain the ATF if it is overfilled.
Check for clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
Check the ATF strainer for debris. If the strainer is clogged with particles of steel or aluminum, inspect the ATF pump. If the ATF pump is OK, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter.
Check the relief valve in the main valve body.
Check the 1st, 2nd, 3rd, 4th, and 5th clutch pressures.
Inspect the mainshaft, secondary shaft, 1st, 2nd, 3rd, 4th, and 5th clutches for wear and damage.
Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clutch end-plate-to-top-disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch waved-plate height. If the discs and plates are worn or damaged, replace them as a set. If the waved-plate height is out of tolerance, replace the waved-plate. If they are OK, adjust the clearance with the clutch end-plate.
Inspect the 2nd, 3rd, and 4th clutch feed pipes.
If the 2nd clutch feed pipe is scored, replace the end cover.
If the 3rd or 4th clutch feed pipe is scored, replace it and the O-rings under the feed pipe flange.
Replace the secondary shaft if the bushing for the 2nd clutch feed pipe or 4th clutch feed pipe is loose or damaged.
Replace the mainshaft if the bushing for the 3rd clutch feed pipe is loose or damaged.

Symptom	Probable cause(s)	Notes
Vehicle moves in N	1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11.	Excessive ATF Foreign material in separator plate orifice Relief valve defective 1st clutch defective 2nd clutch defective 3rd clutch defective 4th clutch defective 5th clutch defective Clutch end-plate-to-top-disc clearance incorrect Needle bearing seized, worn, or damaged Thrust washer seized, worn, or damaged	Check the ATF level, and drain the ATF if it is overfilled. Check for clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice. Check the ATF strainer for debris. If the strainer is clogged with particles of steel or aluminum, inspect the ATF pump. If the ATF pump is OK, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter. Check the relief valve in the main valve body. Check the 1st, 2nd, 3rd, 4th, and 5th clutch pressures. Inspect the mainshaft, secondary shaft, 1st, 2nd, 3rd, 4th, and 5th clutches for wear and damage. Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clutch end-plate-to-top-disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch waved-plate height. If the discs and plates are worn or damaged, replace them as a set. If the waved-plate height is out of tolerance, replace the waved-plate. If they are OK, adjust the clearance with the clutch end-plate. Inspect the 2nd, 3rd, and 4th clutch feed pipes. If the 2nd clutch feed pipe is scored, replace the end cover. If the 3rd or 4th clutch feed pipe is scored, replace it and the O-rings under the feed pipe flange. Replace the secondary shaft if the bushing for the 2nd clutch feed pipe or 4th clutch feed pipe is loose or damaged. Replace the mainshaft if the bushing for the 3rd clutch feed pipe is loose or damaged.

Symptom Probable cause(s) Notes
Late shift after shifting from N to D, or excessive shock when shifted into D 1.

2.

3.

4.

5.

6.

7.

8.

9.

10.
11.
12.
13.
14. A/T clutch pressure control solenoid valve A defective
A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
Shift cable broken or out of adjustment
Connection between shift cable and transmission or body is worn
Input shaft (mainshaft) speed sensor defective
Output shaft (countershaft) speed sensor defective
ATF temperature sensor defective
Foreign material in separator plate orifice
Servo control valve defective
1st accumulator defective
1st check ball stuck
Lock-up shift valve defective
1st clutch defective
Check for a stored DTC, and check for loose connections.
Test the solenoid valve function with the HDS.
Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage.
Inspect the O-rings, and check the shift solenoid valve seizure.
Check for a loose shift cable at the shift lever and the transmission control lever.
Check the input shaft (mainshaft) speed sensor and output shaft (countershaft) speed sensor installation.
Inspect the sensor O-ring for wear and damage.
Check for clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
Check the ATF strainer for debris. If the strainer is clogged with particles of steel or aluminum, inspect the ATF pump. If the ATF pump is OK, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter.
Check the servo control valve in the main valve body.
Inspect the 1st accumulator piston, O-ring, and spring for wear and damage in the regulator valve body.
Check the 1st check ball for stuck in the main valve body.
Check the lock-up shift valve in the regulator valve body.
Check the 1st clutch pressure.
Inspect the secondary shaft and 1st clutch for wear and damage.
Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clutch end-plate-to-top-disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch waved-plate height. If the discs and plates are worn or damaged, replace them as a set. If the waved-plate height is out of tolerance, replace the waved-plate. If they are OK, adjust the clearance with the clutch end-plate.

Symptom	Probable cause(s)	Notes
Late shift after shifting from N to D, or excessive shock when shifted into D	1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14.	A/T clutch pressure control solenoid valve A defective A/T clutch pressure control solenoid valve B defective A/T clutch pressure control solenoid valve C defective Shift cable broken or out of adjustment Connection between shift cable and transmission or body is worn Input shaft (mainshaft) speed sensor defective Output shaft (countershaft) speed sensor defective ATF temperature sensor defective Foreign material in separator plate orifice Servo control valve defective 1st accumulator defective 1st check ball stuck Lock-up shift valve defective 1st clutch defective	Check for a stored DTC, and check for loose connections. Test the solenoid valve function with the HDS. Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage. Inspect the O-rings, and check the shift solenoid valve seizure. Check for a loose shift cable at the shift lever and the transmission control lever. Check the input shaft (mainshaft) speed sensor and output shaft (countershaft) speed sensor installation. Inspect the sensor O-ring for wear and damage. Check for clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice. Check the ATF strainer for debris. If the strainer is clogged with particles of steel or aluminum, inspect the ATF pump. If the ATF pump is OK, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter. Check the servo control valve in the main valve body. Inspect the 1st accumulator piston, O-ring, and spring for wear and damage in the regulator valve body. Check the 1st check ball for stuck in the main valve body. Check the lock-up shift valve in the regulator valve body. Check the 1st clutch pressure. Inspect the secondary shaft and 1st clutch for wear and damage. Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clutch end-plate-to-top-disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch waved-plate height. If the discs and plates are worn or damaged, replace them as a set. If the waved-plate height is out of tolerance, replace the waved-plate. If they are OK, adjust the clearance with the clutch end-plate.

Symptom Probable cause(s) Notes
Late shift after shifting from N to R, or excessive shock when shifted into R 1.
2.

3.

4.

5.

6.

7.

8.
9.

10.
11.

12.
13. Shift solenoid valve D defective
A/T clutch pressure control solenoid valve A defective
Shift cable broken or out of adjustment
Connection between shift cable and transmission or body is worn
Input shaft (mainshaft) speed sensor defective
Output shaft (countershaft) speed sensor defective
ATF temperature sensor defective
Shift fork shaft stuck
Foreign material in separator plate orifice
Shift valve D defective
5th/reverse accumulator defective
Lock-up shift valve defective
5th clutch defective
Check for a stored DTC, and check for loose connections.
Test the solenoid valve function with the HDS.
Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage.
Inspect the O-rings, and check the shift solenoid valve seizure.
Check for a loose shift cable at the shift lever and the transmission control shaft.
Check the input shaft (mainshaft) speed sensor and output shaft (countershaft) speed sensor installation.
Inspect the sensor O-ring for wear and damage.
Check for a missing shift fork bolt on the shift fork shaft.
Inspect the servo valve O-ring.
Check the shift fork shaft detent for wear and damage.
Check for clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
Check the ATF strainer for debris. If the strainer is clogged with particles of steel or aluminum, inspect the ATF pump. If the ATF pump is OK, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter.
Check the shift valve D in the main valve body.
Inspect the 5th accumulator piston, O-ring, and spring for wear and damage in the servo body.
Check the lock-up shift valve in the regulator valve body.
Check the 5th clutch pressure.
Inspect the mainshaft and 5th clutch for wear and damage.
Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clutch end-plate-to-top-disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch waved-plate height. If the discs and plates are worn or damaged, replace them as a set. If the waved-plate height is out of tolerance, replace the waved-plate. If they are OK, adjust the clearance with the clutch end-plate.

Symptom	Probable cause(s)	Notes
Late shift after shifting from N to R, or excessive shock when shifted into R	1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13.	Shift solenoid valve D defective A/T clutch pressure control solenoid valve A defective Shift cable broken or out of adjustment Connection between shift cable and transmission or body is worn Input shaft (mainshaft) speed sensor defective Output shaft (countershaft) speed sensor defective ATF temperature sensor defective Shift fork shaft stuck Foreign material in separator plate orifice Shift valve D defective 5th/reverse accumulator defective Lock-up shift valve defective 5th clutch defective	Check for a stored DTC, and check for loose connections. Test the solenoid valve function with the HDS. Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage. Inspect the O-rings, and check the shift solenoid valve seizure. Check for a loose shift cable at the shift lever and the transmission control shaft. Check the input shaft (mainshaft) speed sensor and output shaft (countershaft) speed sensor installation. Inspect the sensor O-ring for wear and damage. Check for a missing shift fork bolt on the shift fork shaft. Inspect the servo valve O-ring. Check the shift fork shaft detent for wear and damage. Check for clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice. Check the ATF strainer for debris. If the strainer is clogged with particles of steel or aluminum, inspect the ATF pump. If the ATF pump is OK, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter. Check the shift valve D in the main valve body. Inspect the 5th accumulator piston, O-ring, and spring for wear and damage in the servo body. Check the lock-up shift valve in the regulator valve body. Check the 5th clutch pressure. Inspect the mainshaft and 5th clutch for wear and damage. Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clutch end-plate-to-top-disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch waved-plate height. If the discs and plates are worn or damaged, replace them as a set. If the waved-plate height is out of tolerance, replace the waved-plate. If they are OK, adjust the clearance with the clutch end-plate.

Symptom Probable cause(s) Notes
Late shift after shifting from D3, S to 2, or 2 to 1 1.

2.

3. A/T clutch pressure control solenoid valve A defective
A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
Check for a stored DTC, and check for loose connections.
Test the solenoid valve function with the HDS.
Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage.

Transmission does not shift gears 1.

2. Input shaft (mainshaft) speed sensor defective
Output shaft (countershaft) speed sensor defective
Check for a stored DTC, and check for loose connections.
Check the input shaft (mainshaft) speed sensor and output shaft (countershaft) speed sensor installation.
Inspect the sensor O-ring for wear and damage.

Excessive shock or flares on all upshifts and downshifts 1.

2.

3.

4.

5.
6. A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
Input shaft (mainshaft) speed sensor defective
Output shaft (countershaft) speed sensor defective
ATF temperature sensor defective
Foreign material in separator plate orifice
Check for a stored DTC, and check for loose connections.
Test the solenoid valve function with the HDS.
Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage.
Check the input shaft (mainshaft) speed sensor and output shaft (countershaft) speed sensor installation.
Inspect the sensor O-ring for wear and damage.
Check for clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
Check the ATF strainer for debris. If the strainer is clogged with particles of steel or aluminum, inspect the ATF pump. If the ATF pump is OK, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter.

Symptom	Probable cause(s)	Notes
Late shift after shifting from D3, S to 2, or 2 to 1	1. 2. 3.	A/T clutch pressure control solenoid valve A defective A/T clutch pressure control solenoid valve B defective A/T clutch pressure control solenoid valve C defective	Check for a stored DTC, and check for loose connections. Test the solenoid valve function with the HDS. Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage.
Transmission does not shift gears	1. 2.	Input shaft (mainshaft) speed sensor defective Output shaft (countershaft) speed sensor defective	Check for a stored DTC, and check for loose connections. Check the input shaft (mainshaft) speed sensor and output shaft (countershaft) speed sensor installation. Inspect the sensor O-ring for wear and damage.
Excessive shock or flares on all upshifts and downshifts	1. 2. 3. 4. 5. 6.	A/T clutch pressure control solenoid valve B defective A/T clutch pressure control solenoid valve C defective Input shaft (mainshaft) speed sensor defective Output shaft (countershaft) speed sensor defective ATF temperature sensor defective Foreign material in separator plate orifice	Check for a stored DTC, and check for loose connections. Test the solenoid valve function with the HDS. Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage. Check the input shaft (mainshaft) speed sensor and output shaft (countershaft) speed sensor installation. Inspect the sensor O-ring for wear and damage. Check for clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice. Check the ATF strainer for debris. If the strainer is clogged with particles of steel or aluminum, inspect the ATF pump. If the ATF pump is OK, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter.

Symptom Probable cause(s) Notes
Excessive shock or flares on 1-2 upshift or 2-1 downshift 1.
2.

3.

4.

5.

6.

7.
8.
9.
10.
11.
12.
13. Shift solenoid valve D defective
A/T clutch pressure control solenoid valve A defective
A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
2nd clutch transmission fluid pressure switch defective
Foreign material in separator plate orifice
1st accumulator defective
2nd accumulator defective
1st check ball stuck
2nd check ball stuck
1st clutch defective
2nd clutch defective
Lock-up shift valve defective
Check for a stored DTC, and check for loose connections.
Test the solenoid valve function with the HDS.
Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage.
Inspect the O-rings, and check the shift solenoid valve seizure.
Check for clogged orifice in the transmission fluid pressure switch connector. If the orifice is clogged, remove it and clean the connector.
Check for clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
Check the ATF strainer for debris. If the strainer is clogged with particles of steel or aluminum, inspect the ATF pump. If the ATF pump is OK, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter.
Inspect the 1st accumulator piston, O-ring, and spring for wear and damage in the servo body.
Inspect the 2nd accumulator piston, O-ring, and spring for wear and damage in the servo body.
Check the 1st check ball and 2nd check ball for stuck in the main valve body.
Check the 1st and 2nd clutch pressures.
Inspect the secondary shaft, 1st clutch, and 2nd clutch for wear and damage.
Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clutch end-plate-to-top-disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch waved-plate height. If the discs and plates are worn or damaged, replace them as a set. If the waved-plate height is out of tolerance, replace the waved-plate. If they are OK, adjust the clearance with the clutch end-plate.
Inspect the 2nd clutch feed pipe. If the 2nd clutch feed pipe is scored, replace the end cover.
Replace the secondary shaft if the bushing for the 2nd clutch feed pipe is loose or damaged.

Symptom	Probable cause(s)	Notes
Excessive shock or flares on 1-2 upshift or 2-1 downshift	1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13.	Shift solenoid valve D defective A/T clutch pressure control solenoid valve A defective A/T clutch pressure control solenoid valve B defective A/T clutch pressure control solenoid valve C defective 2nd clutch transmission fluid pressure switch defective Foreign material in separator plate orifice 1st accumulator defective 2nd accumulator defective 1st check ball stuck 2nd check ball stuck 1st clutch defective 2nd clutch defective Lock-up shift valve defective	Check for a stored DTC, and check for loose connections. Test the solenoid valve function with the HDS. Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage. Inspect the O-rings, and check the shift solenoid valve seizure. Check for clogged orifice in the transmission fluid pressure switch connector. If the orifice is clogged, remove it and clean the connector. Check for clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice. Check the ATF strainer for debris. If the strainer is clogged with particles of steel or aluminum, inspect the ATF pump. If the ATF pump is OK, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter. Inspect the 1st accumulator piston, O-ring, and spring for wear and damage in the servo body. Inspect the 2nd accumulator piston, O-ring, and spring for wear and damage in the servo body. Check the 1st check ball and 2nd check ball for stuck in the main valve body. Check the 1st and 2nd clutch pressures. Inspect the secondary shaft, 1st clutch, and 2nd clutch for wear and damage. Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clutch end-plate-to-top-disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch waved-plate height. If the discs and plates are worn or damaged, replace them as a set. If the waved-plate height is out of tolerance, replace the waved-plate. If they are OK, adjust the clearance with the clutch end-plate. Inspect the 2nd clutch feed pipe. If the 2nd clutch feed pipe is scored, replace the end cover. Replace the secondary shaft if the bushing for the 2nd clutch feed pipe is loose or damaged.

Symptom Probable cause(s) Notes
Excessive shock or flares on 2-3 upshift or 3-2 downshift 1.

2.

3.

4.

5.
6.
7.
8.
9. A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
3rd clutch transmission fluid pressure switch defective
Foreign material in separator plate orifice
2nd accumulator defective
3rd accumulator defective
2nd check ball stuck
2nd clutch defective
3rd clutch defective
Check for a stored DTC, and check for loose connections.
Test the solenoid valve function with the HDS.
Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage.
Check for clogged orifice in the transmission fluid pressure switch connector. If the orifice is clogged, remove it and clean the connector.
Check for clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
Check the ATF strainer for debris. If the strainer is clogged with particles of steel or aluminum, inspect the ATF pump. If the ATF pump is OK, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter.
Inspect the 2nd and 3rd accumulator pistons, O-rings, and springs for wear and damage in the servo body.
Check the 2nd check ball for stuck in the main valve body.
Check the 2nd and 3rd clutch pressures.
Inspect the secondary shaft, mainshaft, 2nd clutch, and 3rd clutch for wear and damage.
Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clutch end-plate-to-top-disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch waved-plate height. If the discs and plates are worn or damaged, replace them as a set. If the waved-plate height is out of tolerance, replace the waved-plate. If they are OK, adjust the clearance with the clutch end-plate.
Inspect the 2nd and 3rd clutch feed pipes.
If the 2nd clutch feed pipe is scored, replace the end cover.
If the 3rd clutch feed pipe is scored, replace it and the O-rings under the feed pipe flange.
Replace the secondary shaft if the bushing for the 2nd clutch feed pipe is loose or damaged.
Replace the mainshaft if the bushing for the 3rd clutch feed pipe is loose or damaged.

Symptom	Probable cause(s)	Notes
Excessive shock or flares on 2-3 upshift or 3-2 downshift	1. 2. 3. 4. 5. 6. 7. 8. 9.	A/T clutch pressure control solenoid valve B defective A/T clutch pressure control solenoid valve C defective 3rd clutch transmission fluid pressure switch defective Foreign material in separator plate orifice 2nd accumulator defective 3rd accumulator defective 2nd check ball stuck 2nd clutch defective 3rd clutch defective	Check for a stored DTC, and check for loose connections. Test the solenoid valve function with the HDS. Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage. Check for clogged orifice in the transmission fluid pressure switch connector. If the orifice is clogged, remove it and clean the connector. Check for clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice. Check the ATF strainer for debris. If the strainer is clogged with particles of steel or aluminum, inspect the ATF pump. If the ATF pump is OK, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter. Inspect the 2nd and 3rd accumulator pistons, O-rings, and springs for wear and damage in the servo body. Check the 2nd check ball for stuck in the main valve body. Check the 2nd and 3rd clutch pressures. Inspect the secondary shaft, mainshaft, 2nd clutch, and 3rd clutch for wear and damage. Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clutch end-plate-to-top-disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch waved-plate height. If the discs and plates are worn or damaged, replace them as a set. If the waved-plate height is out of tolerance, replace the waved-plate. If they are OK, adjust the clearance with the clutch end-plate. Inspect the 2nd and 3rd clutch feed pipes. If the 2nd clutch feed pipe is scored, replace the end cover. If the 3rd clutch feed pipe is scored, replace it and the O-rings under the feed pipe flange. Replace the secondary shaft if the bushing for the 2nd clutch feed pipe is loose or damaged. Replace the mainshaft if the bushing for the 3rd clutch feed pipe is loose or damaged.

Symptom Probable cause(s) Notes
Excessive shock or flares on 3-4 upshift or 4-3 downshift 1.

2.

3.

4.
5.
6.
7. A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
Foreign material in separator plate orifice
3rd accumulator defective
4th accumulator defective
3rd clutch defective
4th clutch defective
Check for a stored DTC, and check for loose connections.
Test the solenoid valve function with the HDS.
Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage.
Check for clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
Check the ATF strainer for debris. If the strainer is clogged with particles of steel or aluminum, inspect the ATF pump. If the ATF pump is OK, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter.
Inspect the 3rd and 4th accumulator pistons, O-rings, and springs for wear and damage in the servo body.
Check the 3rd and 4th clutch pressures.
Inspect the mainshaft, secondary shaft, 3rd clutch, and 4th clutch for wear and damage.
Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clutch end-plate-to-top-disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch waved-plate height. If the discs and plates are worn or damaged, replace them as a set. If the waved-plate height is out of tolerance, replace the waved-plate. If they are OK, adjust the clearance with the clutch end-plate.
Inspect the 3rd and 4th clutch feed pipes.
If the 3rd clutch feed pipe is scored, replace it and the O-rings under the feed pipe flange.
If the 4th clutch feed pipe is scored, replace it and the O-rings under the feed pipe flange.
Replace the secondary shaft if the bushing for the 4th clutch feed pipe is loose or damaged.
Replace the mainshaft if the bushing for the 3rd clutch feed pipe is loose or damaged.

Symptom	Probable cause(s)	Notes
Excessive shock or flares on 3-4 upshift or 4-3 downshift	1. 2. 3. 4. 5. 6. 7.	A/T clutch pressure control solenoid valve B defective A/T clutch pressure control solenoid valve C defective Foreign material in separator plate orifice 3rd accumulator defective 4th accumulator defective 3rd clutch defective 4th clutch defective	Check for a stored DTC, and check for loose connections. Test the solenoid valve function with the HDS. Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage. Check for clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice. Check the ATF strainer for debris. If the strainer is clogged with particles of steel or aluminum, inspect the ATF pump. If the ATF pump is OK, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter. Inspect the 3rd and 4th accumulator pistons, O-rings, and springs for wear and damage in the servo body. Check the 3rd and 4th clutch pressures. Inspect the mainshaft, secondary shaft, 3rd clutch, and 4th clutch for wear and damage. Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clutch end-plate-to-top-disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch waved-plate height. If the discs and plates are worn or damaged, replace them as a set. If the waved-plate height is out of tolerance, replace the waved-plate. If they are OK, adjust the clearance with the clutch end-plate. Inspect the 3rd and 4th clutch feed pipes. If the 3rd clutch feed pipe is scored, replace it and the O-rings under the feed pipe flange. If the 4th clutch feed pipe is scored, replace it and the O-rings under the feed pipe flange. Replace the secondary shaft if the bushing for the 4th clutch feed pipe is loose or damaged. Replace the mainshaft if the bushing for the 3rd clutch feed pipe is loose or damaged.

Symptom Probable cause(s) Notes
Excessive shock or flares on 4-5 upshift or 5-4 downshift 1.

2.

3.

4.
5.
6.
7. A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
Foreign material in separator plate orifice
4th accumulator defective
5th accumulator defective
4th clutch defective
5th clutch defective
Check for a stored DTC, and check for loose connections.
Test the solenoid valve function with the HDS.
Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-ring for wear and damage.
Check for clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
Check the ATF strainer for debris. If the strainer is clogged with particles of steel or aluminum, inspect the ATF pump. If the ATF pump is OK, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter.
Inspect the 4th and 5th accumulator pistons, O-rings, and springs for wear and damage in the servo body.
Check the 4th and 5th clutch pressures.
Inspect the mainshaft, secondary shaft, 4th clutch, and 5th clutch for wear and damage.
Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clutch end-plate-to-top-disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch waved-plate height. If the discs and plates are worn or damaged, replace them as a set. If the waved-plate height is out of tolerance, replace the waved-plate. If they are OK, adjust the clearance with the clutch end-plate.
Inspect the 4th clutch feed pipes. If the 4th clutch feed pipe is scored, replace it and the O-rings under the feed pipe flange.
Replace the secondary shaft if the bushing for the 4th clutch feed pipe is loose or damaged.

Engine flares while driving 1.

2.

3.
4.
5. A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
Shift solenoid valve A defective
Shift solenoid valve B defective
Shift solenoid valve C defective
Check for a stored DTC, and check for loose connections.
Test the solenoid valve function with the HDS.
Inspect the A/T clutch pressure control solenoid valve body gasket and ATF feed pipes for wear and damage.
Inspect the O-rings, and check the shift solenoid valve seizure.

Symptom	Probable cause(s)	Notes
Excessive shock or flares on 4-5 upshift or 5-4 downshift	1. 2. 3. 4. 5. 6. 7.	A/T clutch pressure control solenoid valve B defective A/T clutch pressure control solenoid valve C defective Foreign material in separator plate orifice 4th accumulator defective 5th accumulator defective 4th clutch defective 5th clutch defective	Check for a stored DTC, and check for loose connections. Test the solenoid valve function with the HDS. Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-ring for wear and damage. Check for clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice. Check the ATF strainer for debris. If the strainer is clogged with particles of steel or aluminum, inspect the ATF pump. If the ATF pump is OK, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter. Inspect the 4th and 5th accumulator pistons, O-rings, and springs for wear and damage in the servo body. Check the 4th and 5th clutch pressures. Inspect the mainshaft, secondary shaft, 4th clutch, and 5th clutch for wear and damage. Inspect the clutch piston, clutch piston check valve, and O-rings. Check the spring retainer for wear and damage. Inspect the clutch end-plate-to-top-disc clearance. If the clearance is out of tolerance, inspect the clutch discs and plates for wear and damage, and inspect the clutch waved-plate height. If the discs and plates are worn or damaged, replace them as a set. If the waved-plate height is out of tolerance, replace the waved-plate. If they are OK, adjust the clearance with the clutch end-plate. Inspect the 4th clutch feed pipes. If the 4th clutch feed pipe is scored, replace it and the O-rings under the feed pipe flange. Replace the secondary shaft if the bushing for the 4th clutch feed pipe is loose or damaged.
Engine flares while driving	1. 2. 3. 4. 5.	A/T clutch pressure control solenoid valve B defective A/T clutch pressure control solenoid valve C defective Shift solenoid valve A defective Shift solenoid valve B defective Shift solenoid valve C defective	Check for a stored DTC, and check for loose connections. Test the solenoid valve function with the HDS. Inspect the A/T clutch pressure control solenoid valve body gasket and ATF feed pipes for wear and damage. Inspect the O-rings, and check the shift solenoid valve seizure.

Symptom Probable cause(s) Notes
Noise from transmission in all shift lever positions 1.
2. ATF pump worn or damaged
Mainshaft bearing, countershaft bearing, or secondary shaft bearing defective
Check the line pressure.
Improper alignment of ATF pump and torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
Be careful not to damage the torque converter housing when replacing the main ball bearing. You may also damage the ATF pump when you torque down the main valve body. This will result in ATF pump seizure.
Install the main seal flush with the torque converter housing when replacing the main seal. If you push it into the torque converter housing until it bottoms out, it will block the fluid return passage and result in damage.
Inspect the mainshaft, countershaft, and secondary shaft bearing for wear and damage.

Vehicle does not accelerate above 50 km/h (31 mph) Torque converter one-way clutch defective Replace the torque converter assembly.
Vibration in all shift lever positions Drive plate defective or transmission misassembled
Check transmission and drive plate installation.
Check the drive plate for wear and damage, if the drive plate is worn or damaged, replace the drive plate.
Check the engine control system.

Shock just before stopping the engine, or at the instant following the engine stopped 1.

2. A/T clutch pressure control solenoid valve A defective
A/T clutch pressure control solenoid valve B defective
Check for a stored DTC, and check for loose connections.
Test the solenoid valve function with the HDS.
Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage.

Shift lever does not operate smoothly 1.

2.

3. Transmission range switch defective or out of adjustment
Shift cable broken or out of adjustment
Connection between shift cable and transmission or body is worn
Check for a stored DTC, and check for loose connections.
Inspect the transmission range switch. If the transmission range switch is faulty, replace it. If the transmission range switch is out of adjustment, adjust it and shift cable.
Check for a loose shift cable at the shift lever and the transmission control lever.

Symptom	Probable cause(s)	Notes
Noise from transmission in all shift lever positions	1. 2.	ATF pump worn or damaged Mainshaft bearing, countershaft bearing, or secondary shaft bearing defective	Check the line pressure. Improper alignment of ATF pump and torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak. Be careful not to damage the torque converter housing when replacing the main ball bearing. You may also damage the ATF pump when you torque down the main valve body. This will result in ATF pump seizure. Install the main seal flush with the torque converter housing when replacing the main seal. If you push it into the torque converter housing until it bottoms out, it will block the fluid return passage and result in damage. Inspect the mainshaft, countershaft, and secondary shaft bearing for wear and damage.
Vehicle does not accelerate above 50 km/h (31 mph)	Torque converter one-way clutch defective	Replace the torque converter assembly.
Vibration in all shift lever positions	Drive plate defective or transmission misassembled	Check transmission and drive plate installation. Check the drive plate for wear and damage, if the drive plate is worn or damaged, replace the drive plate. Check the engine control system.
Shock just before stopping the engine, or at the instant following the engine stopped	1. 2.	A/T clutch pressure control solenoid valve A defective A/T clutch pressure control solenoid valve B defective	Check for a stored DTC, and check for loose connections. Test the solenoid valve function with the HDS. Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage.
Shift lever does not operate smoothly	1. 2. 3.	Transmission range switch defective or out of adjustment Shift cable broken or out of adjustment Connection between shift cable and transmission or body is worn	Check for a stored DTC, and check for loose connections. Inspect the transmission range switch. If the transmission range switch is faulty, replace it. If the transmission range switch is out of adjustment, adjust it and shift cable. Check for a loose shift cable at the shift lever and the transmission control lever.

Symptom Probable cause(s) Notes
Transmission does not shift into P 1.

2.

3. Shift cable broken or out of adjustment
Connection between shift cable and transmission or body is worn
Park mechanism defective
Check for a loose shift cable at the shift lever and the transmission control lever.
Check the park pawl spring installation and the park lever spring installation. If installation is incorrect, install the spring correctly. Make sure that the park lever stop is not installed upside down. Check the distance between the park pawl shaft and park lever pin. If the distance is out of tolerance, adjust the distance with the park lever stop.

Torque converter clutch does not disengage 1.
2.

3.

4.
5. Shift solenoid valve D defective
A/T clutch pressure control solenoid valve A defective
Torque converter clutch piston defective
Lock-up shift valve defective
Lock-up control valve defective
Check for a stored DTC, and check for loose connections.
Test the solenoid valve function with the HDS.
Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage.
Inspect the O-rings, and check the shift solenoid valve seizure.
Replace the torque converter assembly.
Check the lock-up shift valve in the regulator valve body.
Check the lock-up control valve in the main valve body.

Torque converter clutch does not operate smoothly 1.
2.

3.

4.

5.
6. Shift solenoid valve D defective
A/T clutch pressure control solenoid valve A defective
Torque converter clutch piston defective
Torque converter check valve defective
Lock-up shift valve defective
Lock-up control valve defective
Check for a stored DTC, and check for loose connections.
Test the solenoid valve function with the HDS.
Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage.
Inspect the O-rings, and check the shift solenoid valve seizure.
Replace the torque converter assembly.
Check the torque converter check valve in the regulator valve body.
Check the lock-up shift valve in the regulator valve body.
Check the lock-up control valve in the main valve body.

Symptom	Probable cause(s)	Notes
Transmission does not shift into P	1. 2. 3.	Shift cable broken or out of adjustment Connection between shift cable and transmission or body is worn Park mechanism defective	Check for a loose shift cable at the shift lever and the transmission control lever. Check the park pawl spring installation and the park lever spring installation. If installation is incorrect, install the spring correctly. Make sure that the park lever stop is not installed upside down. Check the distance between the park pawl shaft and park lever pin. If the distance is out of tolerance, adjust the distance with the park lever stop.
Torque converter clutch does not disengage	1. 2. 3. 4. 5.	Shift solenoid valve D defective A/T clutch pressure control solenoid valve A defective Torque converter clutch piston defective Lock-up shift valve defective Lock-up control valve defective	Check for a stored DTC, and check for loose connections. Test the solenoid valve function with the HDS. Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage. Inspect the O-rings, and check the shift solenoid valve seizure. Replace the torque converter assembly. Check the lock-up shift valve in the regulator valve body. Check the lock-up control valve in the main valve body.
Torque converter clutch does not operate smoothly	1. 2. 3. 4. 5. 6.	Shift solenoid valve D defective A/T clutch pressure control solenoid valve A defective Torque converter clutch piston defective Torque converter check valve defective Lock-up shift valve defective Lock-up control valve defective	Check for a stored DTC, and check for loose connections. Test the solenoid valve function with the HDS. Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage. Inspect the O-rings, and check the shift solenoid valve seizure. Replace the torque converter assembly. Check the torque converter check valve in the regulator valve body. Check the lock-up shift valve in the regulator valve body. Check the lock-up control valve in the main valve body.

Symptom Probable cause(s) Notes
Torque converter clutch does not engage 1.
2.

3.

4.

5.

6.

7.
8. Shift solenoid valve D defective
A/T clutch pressure control solenoid valve A defective
Input shaft (mainshaft) speed sensor defective
Output shaft (countershaft) speed sensor defective
Torque converter clutch piston defective
Torque converter check valve defective
Lock-up shift valve defective
Lock-up control valve defective
Check for a stored DTC, and check for loose connections.
Test the solenoid valve function with the HDS.
Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage.
Inspect the O-rings, and check the shift solenoid valve seizure.
Check the input shaft (mainshaft) speed sensor and output shaft (countershaft) speed sensor installation.
Inspect the sensor O-ring for wear and damage.
Replace the torque converter assembly.
Check the torque converter check valve in the regulator valve body.
Check the lock-up shift valve in the regulator valve body.
Check the lock-up control valve in the main valve body.

A/T gear position indicator does not indicate shift lever positions 1.

2.

3. Transmission range switch defective or out of adjustment
Shift cable broken or out of adjustment
Connection between shift cable and transmission or body worn
Check for a stored DTC, and check for loose connections.
Inspect the transmission range switch. If the transmission range switch is faulty, replace it. If the transmission range switch is out of adjustment, adjust it and shift cable.
Check for a loose shift cable at the shift lever and the transmission control lever.

Speedometer and odometer do not work Output shaft (countershaft) speed sensor defective
Check for a stored DTC, and check for loose connections.
Check the output shaft (countershaft) speed sensor installation.
Inspect the sensor O-ring.

Engine does not rev to high rpm, and the transmission upshifts at low rpm (engine at normal operating temperature) Engine rocker arm defective Check the engine rocker arms.

Symptom	Probable cause(s)		Notes
Torque converter clutch does not engage	1. 2. 3. 4. 5. 6. 7. 8.	Shift solenoid valve D defective A/T clutch pressure control solenoid valve A defective Input shaft (mainshaft) speed sensor defective Output shaft (countershaft) speed sensor defective Torque converter clutch piston defective Torque converter check valve defective Lock-up shift valve defective Lock-up control valve defective	Check for a stored DTC, and check for loose connections. Test the solenoid valve function with the HDS. Inspect the A/T clutch pressure control solenoid valve body gasket, ATF feed pipes, and O-rings for wear and damage. Inspect the O-rings, and check the shift solenoid valve seizure. Check the input shaft (mainshaft) speed sensor and output shaft (countershaft) speed sensor installation. Inspect the sensor O-ring for wear and damage. Replace the torque converter assembly. Check the torque converter check valve in the regulator valve body. Check the lock-up shift valve in the regulator valve body. Check the lock-up control valve in the main valve body.
A/T gear position indicator does not indicate shift lever positions	1. 2. 3.	Transmission range switch defective or out of adjustment Shift cable broken or out of adjustment Connection between shift cable and transmission or body worn	Check for a stored DTC, and check for loose connections. Inspect the transmission range switch. If the transmission range switch is faulty, replace it. If the transmission range switch is out of adjustment, adjust it and shift cable. Check for a loose shift cable at the shift lever and the transmission control lever.
Speedometer and odometer do not work	Output shaft (countershaft) speed sensor defective		Check for a stored DTC, and check for loose connections. Check the output shaft (countershaft) speed sensor installation. Inspect the sensor O-ring.
Engine does not rev to high rpm, and the transmission upshifts at low rpm (engine at normal operating temperature)	Engine rocker arm defective		Check the engine rocker arms.