DTC Troubleshooting
DTC P0971: CVT Start Clutch Pressure Control Valve Circuit High VoltageNOTE:
^ Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, 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. 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 keep the shift lever in D for at least 1 second.
4. Check for Temporary DTCs or 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 start clutch pressure control valve.
5. Turn the ignition switch to LOCK (0).
6. Disconnect the solenoid harness connector.
7. Measure the resistance between solenoid harness connector terminals No. 4 and No. 8.
Is there 3.8 - 6.8 Ohms?
YES - Go to step 11.
NO - Go to step 8.
8. Remove the lower valve body.
9. Disconnect the CVT start clutch pressure control valve connector.
10. Measure the resistance between CVT start clutch pressure control valve connector terminals No. 1 and No. 2.
Is there 3.8 - 6.8 Ohms?
YES - Replace the solenoid harness, then go to step 19.
NO - Replace the CVT start clutch pressure control valve, then go to step 19.
11. Jump the SCS line with the HDS.
12. Disconnect PCM connector B (44P).
13. Turn the ignition switch to ON (II).
14. Measure the voltage between PCM connector terminal B25 and body ground, and between PCM connector terminal B41 and body ground.
Is there voltage?
YES - Repair short to power in the wire between PCM connector terminal B25 and solenoid harness connector terminal No. 4, or repair short to power in the wire between PCM connector terminal B41 and solenoid harness connector terminal No. 8, then go to step 19.
NO - Go to step 15.
15. Turn the ignition switch to LOCK (0).
16. Check for continuity between PCM connector terminal B25 and body ground, and between PCM connector terminal B41 and body ground.
Is there continuity?
YES - Repair short to body ground in the wire between PCM connector terminal B25 and solenoid harness connector terminal No. 4, or repair short to body ground in the wire between PCM connector terminal B41 and solenoid harness connector terminal No. 8, then go to step 19.
NO - Go to step 17.
17. Disconnect PCM connector C (44P).
18. Check for continuity between following PCM connector terminals and body ground individually:
^ B1 and body ground
^ B6 and body ground
^ B36 and body ground
^ B40 and body ground
^ C40 and body ground
^ C44 and body ground
Is there continuity?
YES - Go to step 25.
NO - Repair open in the wires between PCM connector terminals B1, B6, B36, B40, C40, C44, and ground (G101), or repair poor ground (G101).
19. Reconnect all connectors.
20. Turn the ignition switch to ON ill).
21. Clear the DTC with the HDS.
22. Start the engine. Shift to D while pressing the brake pedal, and keep the shift lever in D for at least 1 second.
23. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0971 indicated?
YES - Check for poor connections or loose terminals between the PCM and the CVT start clutch pressure control valve, then go to step 1.
NO - Go to step 24.
24. 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 Temporary DTCs or DTCs were indicated in step 23, 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 start clutch pressure control valve, then go to step 1. If the HDS indicates NOT COMPLETED, go to step 22.
25. Reconnect all connectors.
26. Update the PCM if it does not have the latest software, or substitute a known-good PCM.
27. Start the engine. Shift to D while pressing the brake pedal, and keep the shift lever in D for at least 1 second.
28. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0971 indicated?
YES - Check for poor connections or loose terminals between the PCM and the CVT start clutch pressure control valve. If the PCM was updated, substitute a known-good PCM, then go to step 27. If the PCM was substituted, go to step 1.
NO - Go to step 29.
29. 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. If any other Temporary DTCs or DTCs were indicated in step 28, 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 start clutch pressure control valve. If the PCM was updated, substitute a known-good PCM, then go to step 27. If the PCM was substituted, go to step 1. If the HDS indicates NOT COMPLETED, go to step 27.