| DTC P0842: | Short in 2nd Clutch Transmission Fluid Pressure Switch Circuit, or 2nd Clutch Transmission Fluid Pressure Switch Stuck ON |
| 1. | Clear the DTC with the HDS. |
| 2. | Check the 2nd PRES SWITCH signal with the HDS in the A/T data list when not in 2nd gear. Is the 2nd PRES SWITCH OFF? YES - Go to 3. NO - Go to 6. |
| 3. | Start the engine, and warm it up to normal operating temperature (the radiator fan comes on). |
| 4. | 7-position transmission: Drive the vehicle in the 2 position for more than 5 seconds, then shift to the D position, and drive in 3rd gear for more than 5 seconds. Slow down and stop the wheels. 5-position transmission: Drive the vehicle in 2nd gear in the S position for more than 5 seconds, then upshift to 3rd gear, and drive in 3rd gear for more than 5 seconds. Slow down and stop the wheels. |
| 5. | Monitor the OBD status for P0842 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail. Does the result indicate FAILED? YES - Go to 6. NO - Intermittent failure, the system is OK at this time. Check the OP2SW (BLU/YEL) wire for an intermittent short to ground between the 2nd clutch transmission fluid pressure switch and the PCM. If the tester indicates NOT COMPLETED, return to 4 and recheck.n |
| 6. | Turn the ignition switch OFF. |
| 7. | Disconnect the 2nd clutch transmission fluid pressure switch connector. |
| 8. | Turn the ignition switch ON (II). |
| 9. | Check the 2nd PRES SWITCH signal with the HDS in the A/T data list. Is the 2nd PRES SWITCH OFF? YES - Replace the 2nd clutch transmission fluid pressure switch, then go to 14. NO - Go to 10. |
| 10. | Turn the ignition switch OFF. |
| 11. | Jump the SCS line with the HDS. |
| 12. | Disconnect PCM connector B (44P). |
| 13. | Check for continuity between PCM connector terminal B8 and body ground.
Is there continuity? YES - Repair short to ground in the wire between PCM connector terminal B8 and the 2nd clutch transmission fluid pressure switch, then go to 14. NO - 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 |
| 14. | Clear the DTC with the HDS. |
| 15. | Start the engine, and warm it up to normal operating temperature (the radiator fan comes on). |
| 16. | 7-position transmission: Drive the vehicle in the 2 position for more than 5 seconds, then shift to the D position, and drive in 3rd gear for more than 5 seconds. Slow down and stop the wheels. 5-position transmission: Drive the vehicle in 2nd gear in the S position for more than 5 seconds, then upshift to 3rd gear, and drive in 3rd gear for more than 5 seconds. Slow down and stop the wheels. |
| 17. | Monitor the OBD status for P0842 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 6 and recheck. |