DTC Troubleshooting

DTC Troubleshooting: P0976

DTC P0976: Short in Shift Solenoid Valve B Circuit

NOTE:

- Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review General Troubleshooting Information. How to Troubleshoot A/T Systems

- This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Start the engine in P, and wait for at least 1 second.

4. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0976 indicated?
YES - Go to step 8.

NO - Go to step 5.


5. Select Shift Solenoid Valve B in the Miscellaneous Test Menu, and test shift solenoid valve B with the HDS.

Is a clicking sound heard?
YES - Go to step 6.

NO - Go to step 8.


6. Start the engine in P, and wait for at least 1 second.

7. Monitor the OBD STATUS for P0976 in the DTCs MENU with the HDS.

Does the HDS indicate FAILED?
YES - Go to step 8.

NO - If the HDS indicates PASSED, intermittent failure, the system is OK at this time. Check for intermittent short to body ground in the wire between shift solenoid valve B and the PCM. If the HDS indicates NOT COMPLETED, go to step 5.


8. Turn the ignition switch to LOCK (0).

9. Jump the SCS line with the HDS.

10. Disconnect PCM connector C (49P).

11. Measure the resistance between PCM connector terminal C28 and body ground.

Is there less than 12 Ohms?
YES - Go to step 12.

NO - Go to step 21.






12. Disconnect the shift solenoid wire harness connector.

13. Check for continuity between PCM connector terminal C28 and body ground.

Is there continuity?
YES - Repair short to body ground in the wire between PCM connector terminal C28 and the shift solenoid wire harness connector, then go to step 15.

NO - Go to step 14.






14. Inspect shift solenoid valve B. A/T Shift Solenoid Valve Test, Replacement, and Shift Solenoid Wire Harness Replacement

Is shift solenoid valve B OK?
YES - Go to step 21.

NO - Replace shift solenoid valve B or the shift solenoid wire harness, A/T Shift Solenoid Valve Test, Replacement, and Shift Solenoid Wire Harness Replacement then go to step 18.


15. Reconnect all connectors.

16. Turn the ignition switch to ON (II).

17. Clear the DTC with the HDS.

18. Start the engine in P, wait for at least 1 second, then test-drive the vehicle in D. Drive the vehicle in 3rd or 4th gear for at least 1 second, then slow down to a stop.

19. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0976 indicated?
YES - Check for intermittent short to body ground in the wire between shift solenoid valve B and the PCM, then go to step 1.

NO - Go to step 20.


20. Monitor the OBD STATUS for P0976 in the DTCs MENU with the HDS.

Does the HDS indicate PASSED?
YES - Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 19, go to the indicated DTC's troubleshooting.

NO - If the HDS indicates FAILED, check for intermittent short to body ground in the wire between shift solenoid valve B and the PCM, then go to step 1. If the HDS indicates NOT COMPLETED, go to step 18.


21. Reconnect all connectors.

22. Update the PCM if it does not have the latest software, ECM/PCM Update or substitute a known-good PCM. Reading and Clearing Diagnostic Trouble Codes

23. Start the engine in P, wait for at least 1 second, then test-drive the vehicle in D. Drive the vehicle in 3rd or 4th gear for at least 1 second, then slow down to a stop.

24. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0976 indicated?
YES - Check for intermittent short to body ground in the wire between shift solenoid valve B and the PCM. If the PCM was updated, substitute a known-good PCM, Reading and Clearing Diagnostic Trouble Codes then go to step 23. If the PCM was substituted, go to step 1.

NO - Go to step 25.


25. Monitor the OBD STATUS for P0976 in the DTCs MENU with the HDS.

Does the HDS indicate PASSED?
YES - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM. Service and Repair If any other Pending or Confirmed DTCs were indicated in step 24, go to the indicated DTC's troubleshooting.

NO - If the HDS indicates FAILED, check for intermittent short to body ground in the wire between shift solenoid valve B and the PCM. If the PCM was updated, substitute a known-good PCM, Reading and Clearing Diagnostic Trouble Codes then go to step 23. If the PCM was substituted, go to step 1. If the HDS indicates NOT COMPLETED, go to step 23.