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DTC Troubleshooting: P0971 (29)

DTC P0971:
 A/T Clutch Pressure Control Solenoid Valve C
NOTE:
  • 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. Clear the DTC with the HDS.
  1. Check that DTC P0971 recurs.
Is DTC P0971 indicated?
YES -
Go to Step 6 .
NO -
Go to Step 3 .
  1. Select Clutch Pressure Control (Linear) Solenoid Valve C in the Miscellaneous Test Menu, and test A/T clutch pressure control solenoid valve C with the HDS.
Does the HDS indicate NORMAL?
YES -
Go to Step 4 .
NO -
Go to Step 6 .
  1. In the Clutch Pressure Control Solenoid Control menu, select Clutch Pressure Control Solenoid Valve C at 0.2 A.
  1. Monitor the OBD status for P0971 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.
Does the HDS indicate FAILED?
YES -
Go to Step 6 .
NO -
Intermittent failure, the system is OK at this time. Check for poor connections and loose terminals at A/T clutch pressure control solenoid valve C and the PCM. If the HDS indicates NOT COMPLETED, return to Step 3 and recheck.
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the A/T clutch pressure control solenoid valve C connector.
  1. Measure the resistance between A/T clutch pressure control solenoid valve C connector terminals No. 1 and No. 2.
Is there 3−10 Ω?
YES -
Go to Step 9 .
NO -

  1. 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 10 .
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 12 .
  1. Connect the A/T clutch pressure control solenoid valve C connector.
  1. Start the engine, and wait for at least 1 second.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0971 indicated?
YES -
If the PCM was updated, substitute a known-good PCM, then recheck. If the PCM was substituted, go to Step 1 .
NO -
Go to Step 14 .
  1. Monitor the OBD status for P0971 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 13 , go to the indicated DTC's troubleshooting.■
NO -
Check for poor connections and loose terminals at A/T clutch pressure control solenoid valve C and the PCM. If the PCM was updated, substitute a known-good PCM, then recheck. If the PCM was substituted, go to Step 1 . If the HDS indicates NOT COMPLETED, return to Step 12 and recheck.
  1. Connect the A/T clutch pressure control solenoid valve C connector.
  1. Clear the DTC with the HDS.
  1. Start the engine, and wait for at least 1 second.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0971 indicated?
YES -
Check for poor connections and loose terminals at A/T clutch pressure control solenoid valve C and the PCM, then go to Step 1 .
NO -
Go to Step 19 .
  1. Monitor the OBD status for P0971 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 18 , go to the indicated DTC's troubleshooting.■
NO -
Check for poor connections and loose terminals at A/T clutch pressure control solenoid valve C and the PCM, then go to Step 1 . If the HDS indicates NOT COMPLETED, return to Step 17 and recheck.