DTC Troubleshooting
DTC P0971: Problem in A/T Clutch Pressure Control Solenoid Valve CNOTE:
^ 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. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Check for DTCs with the HDS. Is DTC P0971 indicated?
YES - Go to step 7.
NO - Go to step 4.
4. Choose Clutch Pressure Control Solenoid Control in Miscellaneous Test Menu, and test A/T clutch pressure control solenoid valve C with the HDS.
Is the result NORMAL?
YES - Go to step 5.
NO - Go to step 7.
5. Command A/T clutch pressure control solenoid valve C at 0.2 A in Clutch Pressure Control Solenoid Control menu.
6. Monitor the OBD STATUS for P0971 in the DTCs MENU with the HDS.
Does the screen indicate FAILED?
YES - Go to step 7.
NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals between A/T clutch pressure control solenoid valve C and the PCM. If the screen indicates NOT COMPLETED, go to step 4.
7. Turn the ignition switch OFF.
8. Disconnect the A/T clutch pressure control solenoid valve C connector.
9. Measure the resistance between A/T clutch pressure control solenoid valve C connector terminals No. 1 and No. 2.
Is there 3-10 Ohms?
YES - Go to step 10.
NO - Replace A/T clutch pressure control solenoid valve C, then go to step 11.
10. Check for continuity between A/T clutch pressure control solenoid valve C connector terminal No. 2 and body ground.
Is there continuity?
YES - Go to step 17.
NO - Repair open in the wire between A/T clutch pressure control solenoid valve C and ground (G101), or repair poor ground (G101), then go to step 11.
11. Reconnect all connectors.
12. Turn the ignition switch ON (II).
13. Clear the DTC with the HDS.
14. Test-drive the vehicle for several minutes in the D position through all five gears.
15. Check for DTCs with the HDS.
Is DTC P0971 indicated?
YES - Check for poor connections or loose terminals between A/T clutch pressure control solenoid valve C and the PCM, then go to step 1.
NO - Go to step 16.
16. Monitor the OBD STATUS for P0971 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES - Troubleshooting is complete. If any other DTCs were indicated in step 15, go to the indicated DTC's troubleshooting.
NO - If the screen indicates FAILED, check for poor connections or loose terminals between A/T clutch pressure control solenoid valve C and the PCM, then go to step 1. If the screen indicates NOT COMPLETED, go to step 14.
17. Update the PCM if it does not have the latest software, or substitute a known-good PCM.
18. Test-drive the vehicle for several minutes in the D position through all five gears.
19. Check for DTCs with the HDS.
Is DTC P0971 indicated?
YES - Check for poor connections or loose terminals between A/T clutch pressure control solenoid valve C and the PCM. If the PCM was updated, substitute a known-good PCM, then go to step 18. If the PCM was substituted, go to step 1.
NO - Go to step 20.
20. Monitor the OBD STATUS for P0971 in the DTCs MENU with the HDS.
Does the screen 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 in step 19, go to the indicated DTC's troubleshooting.
NO - If the screen indicates FAILED, check for poor connections or loose terminals between A/T clutch pressure control solenoid valve C and the PCM. If the PCM was updated, substitute a known-good PCM, then go to step 18. If the PCM was substituted, go to step 1. If the screen indicates NOT COMPLETED, go to step 18.