DTC Troubleshooting
DTC P0974: Open in Shift Solenoid Valve A CircuitNOTE:
^ 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. Start the engine in P, and wait for at least 1 second.
3. Check that DTC P0974 recurs.
Is DTC P0974 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. Start the engine in P, and wait for at least 1 second.
6. Monitor the OBD STATUS for P0974 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 for poor connections or loose terminals at 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 connectors B (44P) and C (44P).
10. Measure the resistance between PCM connector terminals B10 and C40.
Is there 12-25 Ohms?
Yes - Go to step 15.
No - Go to step 11.
11. Disconnect the shift solenoid harness connector.
12. Check for continuity between PCM connector terminal B10 and shift solenoid harness connector terminal No. 5.
Is there continuity?
Yes - Go to step 13.
No - Repair open in the wire between PCM connector terminal B10 and the shift solenoid harness connector, then go to step 21.
13. Remove the shift solenoid harness.
14. Check for continuity between shift solenoid harness connector terminal No. 5 and the shift solenoid valve A connector terminal.
Is there continuity?
Yes - Replace shift solenoid valve A, then go to step 21.
No - Replace the shift solenoid harness, then go to step 21.
15. Connect PCM connectors B (44P) and C (44P).
16. Update the A/T software in the PCM if it does not have the latest software, or substitute a known-good PCM.
17. Start the engine in P, and wait for at least 1 second.
18. With the brake pedal pressed, shift to R, and wait for at least 1 second.
19. Check for DTC(s) in the DTCs/Freeze Data in A/T Mode Menu with the HDS.
Is DTC P0974 indicated?
Yes - If the PCM was updated, substitute a known-good PCM, then recheck. If the PCM was substituted, reinstall the original PCM, then go to step 1.
No - Go to step 20.
20. Monitor the OBD STATUS for P0974 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. If any other DTCs were indicated on step 19, go to the indicated DTC's troubleshooting.
No - Check for poor connections and loose terminals at shift solenoid valve A and the PCM. If the PCM was updated, substitute a known-good PCM, then recheck. If the PCM was substituted, reinstall the original PCM, then go to step 1. If the HDS indicates NOT COMPLETED, return to step 17 and recheck.
21. Reconnect all connectors.
22. Clear the DTC with the HDS.
23. Start the engine in P, and wait for at least 1 second.
24. With the brake pedal pressed, shift to R, and wait for at least 1 second.
25. Check for DTC(s) in the DTCs/Freeze Data in A/T Mode Menu with the HDS.
Is DTC P0974 indicated?
Yes - Check for poor connections and loose terminals at shift solenoid valve A and the PCM, then go to step 1.
No - Go to step 26.
26. Monitor the OBD STATUS for P0974 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 25, go to the indicated DTC's troubleshooting.
No - Check for poor connections and loose terminals at shift solenoid valve A and the PCM, then go to step 1. If the HDS indicates NOT COMPLETED, return to step 23 and recheck.