DTC Troubleshooting
DTC Troubleshooting: P0971 (32)
DTC P0971:
Pressure Control Solenoid "C" Control Circuit High
NOTE:
- Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review the General Troubleshooting Information.
- 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, shift the shift lever to D while pressing the brake pedal, and let the engine idle for at least 1 second.
4. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0971 indicated?
YES -
Go to step 5.
NO -
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals between the PCM and the CVT clutch pressure control solenoid valve.
5. Turn the ignition switch to LOCK (0).
6. Disconnect the solenoid wire harness 8P connector.
7. Measure the resistance between solenoid wire harness 7P connector terminals No. 1 and No. 4.
Is there 3.8-6.8 Ohms?
YES -
Go to step 11.
NO -
Go to step 8.
8. Remove the lower valve body Lower Valve Body Removal/Installation (CVT).
9. Disconnect the CVT clutch pressure control solenoid valve 2P connector.
10. Measure the resistance between CVT clutch pressure control solenoid valve 2P connector terminals No. 1 and No. 2.
Is there 3.8-6.8 Ohms?
YES -
Replace the solenoid wire harness CVT Drive Pulley Pressure Control Solenoid Valve Replacement (CVT), then go to step 16.
NO -
Replace the CVT clutch pressure control solenoid valve CVT Clutch Pressure Control Solenoid Valve Replacement (CVT), then go to step 16.
11. Jump the SCS line with the HDS.
12. Disconnect PCM connector B (44P).
13. Check for continuity between PCM connector terminal B1 and body ground, and between PCM connector terminal B36 and body ground.
Is there continuity?
YES -
Go to step 14.
NO -
Repair an open in the wire between PCM connector terminal B1, B36, and body ground (G101), or repair poor body ground (G101), then go to step 16.
14. Check for continuity between solenoid wire harness 8P connector terminal No. 5 and body ground.
Is there continuity?
YES -
Go to step 15.
NO -
Repair an open in the wire between solenoid wire harness 8P connector terminal No. 5 and body ground, then go to step 16.
15. Check for continuity between PCM connector terminal B42 and solenoid wire harness 8P connector terminal No. 1.
Is there continuity?
YES -
Go to step 22.
NO -
Repair an open in the wire between PCM connector terminal B42 and the solenoid wire harness 8P connector, then go to step 16.
16. Reconnect all connectors.
17. Turn the ignition switch to ON (II).
18. Clear the DTC with the HDS.
19. Start the engine, shift the shift lever to D while pressing the brake pedal, and let the engine idle for at least 1 second.
20. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0971 indicated?
YES -
Check for poor connections or loose terminals between the PCM and the CVT clutch pressure control solenoid valve, then go to step 1.
NO -
Go to step 21.
21. Monitor the OBD STATUS for P0971 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 20, go to the indicated DTC's troubleshooting.
NO -
If the HDS indicates FAILED, check for poor connections or loose terminals between the PCM and the CVT clutch pressure control solenoid valve, then go to step 1. If the HDS indicates NOT COMPLETED, go to step 19.
22. Reconnect all connectors.
23. Update the PCM if it does not have the latest software ECM/PCM Update, or substitute a known-good PCM.
24. Start the engine, shift the shift lever to D while pressing the brake pedal, and let the engine idle for at least 1 second.
25. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0971 indicated?
YES -
Check for poor connections or loose terminals between the PCM and the CVT clutch pressure control solenoid valve. If the PCM was updated, substitute a known-good PCM, then go to step 24. If the PCM was substituted, go to step 1.
NO -
Go to step 26.
26. Monitor the OBD STATUS for P0971 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 25, go to the indicated DTC's troubleshooting.
NO -
If the HDS indicates FAILED, check for poor connections or loose terminals between the PCM and the CVT clutch pressure control solenoid valve. If the PCM was updated, substitute a known-good PCM, then go to step 24. If the PCM was substituted, go to step 1. If the HDS indicates NOT COMPLETED, go to step 24.