DTC Troubleshooting
DTC Troubleshooting: P0974 (7)
DTC P0974:
Shift Solenoid Valve A Circuit (Open)
NOTE:
- Before you troubleshoot, record all freeze data and any on-board snapshot, and review 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.
K24Z6 Engine
1. Clear the DTC with the HDS.
2. Start the engine in P, and wait for at least 1 second.
3. Check if DTC P0974 recurs.
Is DTC P0974 indicated?
YES -
Go to step 7.
NO -
Go to step 4.
4. Select Shift Solenoid Valve 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 MENU with the HDS.
Does the HDS indicate FAILED?
YES -
Go to step 7.
NO -
If the HDS indicates PASSED, 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, go to step 4 P0974 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 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 B11 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 B11 and the shift solenoid harness connector, then go to step 21.
13. Remove the shift solenoid harness Shift Solenoid Valve Test, Replacement, And Shift Solenoid Wire Harness Replacement.
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 Shift Solenoid Valve Test, Replacement, And Shift Solenoid Wire Harness Replacement, then go to step 21.
NO -
Replace the shift solenoid harness Shift Solenoid Valve Test, Replacement, And Shift Solenoid Wire Harness Replacement, then go to step 21.
15. Connect PCM connector B (49P).
16. Update the A/T software in the PCM if it does not have the latest software PCM Update, or substitute a known-good PCM Initial Inspection and Diagnostic Overview.
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 Pending or Confirmed DTCs with the HDS.
Is DTC P0974 indicated?
YES -
If the PCM was updated, substitute a known-good PCM Initial Inspection and Diagnostic Overview, 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 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 on step 19 P0974, go to the indicated DTC's troubleshooting.�
NO -
If the HDS indicates FAILED, 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 Initial Inspection and Diagnostic Overview, then recheck. If the PCM was substituted, reinstall the original PCM, then go to step 1. If the HDS indicates NOT COMPLETED, go to step 17 P0974 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 Pending or Confirmed DTCs 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 MENU with the HDS.
Does the HDS indicate PASSED?
YES -
Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated on step 25 P0974, go to the indicated DTC's troubleshooting.�
NO -
If the HDS indicates FAILED, 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, go to step 23 P0974 and recheck.