DTC Troubleshooting
DTC Troubleshooting: P0973 (7)
DTC P0973:
Shift Solenoid Valve A (Short)
NOTE:
- Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review the General Troubleshooting Information How To Troubleshoot The A/T System.
- This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
- Some wire colors vary according to the model year, and are indicated with an asterisk as follows:
- *(1): '09 - 10 models
1. Clear the DTC with the HDS.
2. Start the engine, and test-drive the vehicle:
- Seven-position transmission: Drive the vehicle in 2nd gear in D, D3, or 2 for at least 1 second, then slow down to a stop.
- Five-position transmission: Drive the vehicle in D or in 2nd gear in the sequential sport shift mode in S for at least 1 second, then slow down to a stop.
3. Check that DTC P0973 recurs.
Is DTC P0973 indicated?
YES -
Go to step 7.
NO -
Go to step 4.
4. Select Shift Solenoid A in the Miscellaneous Test Menu, and test shift solenoid valve A with the HDS.
Is a clicking sound heard?
YES -
Go to step 5.
NO -
Go to step 7.
5. Test-drive the vehicle:
- Seven-position transmission: Drive the vehicle in 2nd gear in D, D3, or 2 for at least 1 second. Slow down to a stop, and wait for at least 1 second.
- Five-position transmission: Drive the vehicle in D or in 2nd gear in the sequential sport shift mode in S for at least 1 second. Slow down to a stop, and wait for at least 1 second.
6. Monitor the OBD status for P0973 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.
Does the HDS indicate FAILED?
YES -
Go to step 7.
NO -
Intermittent failure, the system is OK at this time. Check the SHA wire for an intermittent short to ground between shift solenoid valve A and the PCM. If the HDS indicates NOT COMPLETED, return to step 4 and recheck.
7. Turn the ignition switch to LOCK (0).
8. Jump the SCS line with the HDS.
9. Disconnect PCM connector B (49P).
10. Measure the resistance between PCM connector terminal B11 and body ground.
Is there less than 12 Ohms?
YES -
Go to step 11.
NO -
Go to step 14.
11. Disconnect the shift solenoid harness connector.
12. Check for continuity between PCM connector terminal B11 and body ground.
Is there continuity?
YES -
Repair a short in the wire between PCM connector terminal B11 and the shift solenoid harness connector, then go to step 19.
NO -
Go to step 13.
13. Inspect shift solenoid valve A Testing and Inspection.
Is shift solenoid valve A OK?
YES -
Go to step 14.
NO -
Replace shift solenoid valve A or the shift solenoid harness Shift Solenoid Valve And Shift Solenoid Wire Harness Replacement, then go to step 19.
14. Reconnect all connectors.
15. Update the A/T software in the PCM if it does not have the latest software ECM/PCM Update, or substitute a known-good PCM.
16. Test-drive the vehicle:
- Seven-position transmission: Drive the vehicle in 2nd gear in D, D3, or 2 for at least 1 second. Slow down to a stop, and wait for at least 1 second.
- Five-position transmission: Drive the vehicle in D or in 2nd gear in the sequential sport shift mode in S for at least 1 second. Slow down to a stop, and wait for at least 1 second.
17. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0973 indicated?
YES -
If the PCM was updated, substitute a known-good PCM, then recheck. If the PCM was substituted, go to step 1.
NO -
Go to step 18.
18. Monitor the OBD status for P0973 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.
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 DTCs were indicated on step 17, go to the indicated DTC's troubleshooting.
NO -
Check for an intermittent short in the wire between shift solenoid valve A and the PCM. If the PCM was updated, substitute a known-good PCM, then recheck. If the PCM was substituted, go to step 1. If the HDS indicates NOT COMPLETED, return to step 16 and recheck.
19. Reconnect all connectors.
20. Clear the DTC with the HDS.
21. Test-drive the vehicle:
- Seven-position transmission: Drive the vehicle in 2nd gear in D, D3, or 2 for at least 1 second. Slow down to a stop, and wait for at least 1 second.
- Five-position transmission: Drive the vehicle in D or in 2nd gear in the sequential sport shift mode in S for at least 1 second. Slow down to a stop, and wait for at least 1 second.
22. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0973 indicated?
YES -
Check for an intermittent short in the wire between shift solenoid valve A and the PCM, then go to step 1.
NO -
Go to step 23.
23. Monitor the OBD status for P0973 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.
Does the HDS indicate PASSED?
YES -
Troubleshooting is complete. If any other DTCs were indicated on step 22, go to the indicated DTC's troubleshooting.
NO -
Check for an intermittent short in the wire between shift solenoid valve A and the PCM, then go to step 1. If the HDS indicates NOT COMPLETED, return to step 21 and recheck.