DTC Troubleshooting: P0706 (6-2)

DTC P0706:

Open in Transmission Range Switch Circuit

• Before you troubleshoot, record all freeze data and any on-board snapshot, and review General Troubleshooting Information.
• This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.

1.	Clear the DTC with the HDS.

2.	Raise the front of the vehicle, make sure it is securely supported, and allow the front wheels to rotate freely. Or raise the vehicle.

3.	Start the engine, run the vehicle in the D position until the vehicle speed reaches 56 km/h (35 mph), then slow down and stop the wheels.

4.

Monitor the OBD status for P0706 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail. Does the result indicate FAILED? YES - Go to 5. NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the transmission range switch and the PCM. If the tester indicates NOT COMPLETED, return to 3 and recheck.n

5.	Turn the ignition switch OFF.

6.	Inspect the transmission range switch. Is the switch OK? YES - Go to 7. NO - Replace the transmission range switch, then go to 30.

7.	Install the transmission range switch correctly, and adjust the shift cable.

8.	Clear the DTC with the HDS.

9.	Turn the ignition switch OFF.

10.	Start the engine, run the vehicle in the D position until the vehicle speed reaches 56 km/h (35 mph), then slow down and stop the wheels.

11.

Monitor the OBD status for P0706 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail. Does the result indicate FAILED? YES - Go to 12. NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the transmission range switch and the PCM. If the tester indicates NOT COMPLETED, return to 10 and recheck.n

12.	Clear the DTC with the HDS.

13.	Shift to the D position, and verify the ATP FWD and ATP D inputs with the HDS in the A/T data list. Is ATP FWD and ATP D ON? YES - 7-position transmission: Go to 14. 5-position transmission: Go to 16. NO - Go to 22.

14.	Shift to the D3 position, and verify the ATF FWD and ATP D3 inputs with the HDS in the A/T data list. Is ATP FWD and ATP D3 ON? YES - Go to 15. NO - Go to 22.

15.	Shift to the 2 position, and verify the ATF FWD and ATP 2-1 inputs with the HDS in the A/T data list. Is ATP FWD and ATP 2-1 ON? YES - Go to 17. NO - Go to 22.

16.	Shift to the S position, and verify the ATF FWD and ATP S inputs with the HDS in the A/T data list. Is ATP FWD and ATP S ON? YES - Go to 17. NO - Go to 22.

17.	Clear the DTC with the HDS.

18.	Turn the ignition switch OFF.

19.	Raise the front of the vehicle, make sure it is securely supported, and allow the front wheels to rotate freely. Or raise the vehicle.

20.	Start the engine, run the vehicle in the D position until the vehicle speed reaches 56 km/h (35 mph), then slow down and stop the wheels.

21.

Monitor the OBD status for P0706 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail. Does the result indicate FAILED? YES - Go to 22. NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the transmission range switch and the PCM. If the tester indicates NOT COMPLETED, return to 20 and recheck.n

22.	Turn the ignition switch OFF.

23.	Disconnect the transmission range switch connector.

24.	Check for continuity between transmission range switch connector terminal No. 10 and body ground.   Is there continuity? YES - Go to 25. NO - Repair open in the wire between the transmission range switch and ground (G101), or repair poor ground (G101), then go to 30.

25.	Turn the ignition switch ON (II).

26.	Measure voltage between transmission range switch connector terminals No. 5 and No. 10.   Is there voltage? YES - Go to 27. NO - Repair open in the wire between the transmission range switch and PCM connector terminal B28, then go to 30.

27.	Measure voltage between transmission range switch connector terminals No. 8 and No. 10.   Is there voltage? YES - Go to 28. NO - Repair open in the wire between the transmission range switch and PCM connector terminal B21, then go to 30.

28.

Measure voltage between transmission range switch connector terminals No. 3 and No. 10.   Is there voltage? YES - 7-position transmission: Go to 29. 5-position transmission: Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away with a known-good PCM, replace the original  PCM.n NO - Repair open in the wire between the transmission range switch and PCM connector terminal B15, then go to 30.

29.

Measure voltage between transmission range switch connector terminals No. 9 and No. 10.   Is there voltage? YES - Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away with a known-good PCM, replace the original  PCM.n NO - Repair open in the wire between the transmission range switch and PCM connector terminal B16, then go to 29.

30.	Clear the DTC with the HDS.

31.	Raise the front of the vehicle, make sure it is securely supported, and allow the front wheels to rotate freely. Or raise the vehicle.

32.	Start the engine, run the vehicle in the D position until the vehicle speed reaches 56 km/h (35 mph), then slow down and stop the wheels.

33.	Monitor the OBD status for P0706 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail. Does the result indicate PASSED? YES - Troubleshooting is complete.n NO - Return to 5 and recheck.