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DTC P0970: A/T Clutch Pressure Control Solenoid Valve C (Open or Short)

WARNING: This page is about a different car, the 2013 Honda Odyssey, 2012 Honda Odyssey, and 2011 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review General Troubleshooting Information (see GENERAL TROUBLESHOOTING INFORMATION  ).
  • This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
  • Check the label on the PCM to see if it was made by Keihin or Continental. Refer to the GENERAL TROUBLESHOOTING INFORMATION .

Keihin PCM 

  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with the HDS.
  3. Start the engine, and wait for at least 1 second.
  4. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P0970 indicated? 

    YES  -Go to step  8.

    NO  -Go to step 5.

  5. 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 6.

    NO  -Go to step  8.

  6. In the Clutch Pressure Control Solenoid Valve Control menu, set A/T Clutch Pressure Control Solenoid Valve Cat 1.0 A.
  7. Monitor the OBD status for P0970 in the DTCs MENU with the HDS.

    Does the HDS indicate FAILED? 

    YES  -Go to step 8.

    NO  -If the HDS indicates PASSED, 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 HDS indicates NOT COMPLETED, go to step  5.

  8. Turn the ignition switch to LOCK (0).
  9. Disconnect the A/T clutch pressure control solenoid valve C connector.
  10. Measure the resistance between A/T clutch pressure control solenoid valve C connector terminals No. 1 and No. 2.
    Fig 1: Measuring Resistance Between A/T Clutch Pressure Control Solenoid Valve C Connector Terminals No. 1 And No. 2
    G06966879Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there 3-10 Ω? 

    YES  -Go to step 11.

    NO  -Replace A/T clutch pressure control solenoid valve C (see A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE C REPLACEMENT  ), then go to step  19.

  11. Check for continuity between A/T clutch pressure control solenoid valve C connector terminal No. 1 and body ground.
    Fig 2: Checking Continuity Between A/T Clutch Pressure Control Solenoid Valve C Connector Terminal No. 1 And Body Ground
    G06966880Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step 12.

    NO  -Repair an open in the wire between A/T clutch pressure control solenoid valve C and body ground (G101) (see GROUND TO COMPONENTS INDEX ), or repair poor body ground (G101), then go to step  16.

  12. Jump the SCS line with the HDS.
  13. Disconnect PCM connector B (49P).
  14. Check for continuity between PCM connector terminal B21 and A/T clutch pressure control solenoid valve C connector terminal No. 2.
    Fig 3: Checking Continuity Between PCM Connector Terminal B21 And A/T Clutch Pressure Control Solenoid Valve C Connector Terminal No. 2
    G06966881Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step 15.

    NO  -Repair an open in the wire between A/T clutch pressure control solenoid valve C connector terminal No. 2 and PCM connector terminal B21, then go to step  16.

  15. Check for continuity between A/T clutch pressure control solenoid valve C connector terminal No. 2 and body ground.
    Fig 4: Checking Continuity Between A/T Clutch Pressure Control Solenoid Valve C Connector Terminal No. 2 And Body Ground
    G06966882Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short to body ground in the wire between PCM connector terminal B21 and A/T clutch pressure control solenoid valve C, then go to step 16.

    NO  -Go to step  22.

  16. Reconnect all connectors.
  17. Turn the ignition switch to ON (II).
  18. Clear the DTC with the HDS.
  19. Start the engine, and wait for at least 1 second.
  20. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P0970 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 21.

  21. Monitor the OBD status for P0970 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 A/T clutch pressure control solenoid valve C and the PCM, 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 (see PCM UPDATE ), or substitute a known-good PCM (see SUBSTITUTING THE PCM ).
  24. Start the engine, and wait for at least 1 second.
  25. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P0970 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 (see SUBSTITUTING THE 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 P0970 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 (see PCM REPLACEMENT ). 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 A/T clutch pressure control solenoid valve C and the PCM. If the PCM was updated, substitute a known-good PCM (see SUBSTITUTING THE 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.



NOTE:
  • Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review General Troubleshooting Information (see GENERAL TROUBLESHOOTING INFORMATION ).
  • This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
  • Check the label on the PCM to see if it was made by Keihin or Continental. Refer to the GENERAL TROUBLESHOOTING INFORMATION .

Continental PCM 

  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with the HDS.
  3. Start the engine, and wait for at least 1 second.
  4. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P0970 indicated? 

    YES  -Go to step  8.

    NO  -Go to step 5.

  5. 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 6.

    NO  -Go to step  8.

  6. In the Clutch Pressure Control Solenoid Valve Control menu, set A/T Clutch Pressure Control Solenoid Valve Cat 1.0 A.
  7. Monitor the OBD status for P0970 in the DTCs MENU with the HDS.

    Does the HDS indicate FAILED? 

    YES  -Go to step 8.

    NO  -If the HDS indicates PASSED, 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 HDS indicates NOT COMPLETED, go to step  5.

  8. Turn the ignition switch to LOCK (0).
  9. Disconnect the A/T clutch pressure control solenoid valve C connector.
  10. Measure the resistance between A/T clutch pressure control solenoid valve C connector terminals No. 1 and No. 2.
    Fig 1: Measuring Resistance Between A/T Clutch Pressure Control Solenoid Valve C Connector Terminals No. 1 And No. 2
    G06966879Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there 3-10 Ω? 

    YES  -Go to step 11.

    NO  -Replace A/T clutch pressure control solenoid valve C (see A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE C REPLACEMENT ), then go to step  22.

  11. Check for continuity between A/T clutch pressure control solenoid valve C connector terminal No. 1 and body ground.
    Fig 2: Checking Continuity Between A/T Clutch Pressure Control Solenoid Valve C Connector Terminal No. 1 And Body Ground
    G06966880Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step 12.

    NO  -Repair an open in the wire between A/T clutch pressure control solenoid valve C connector terminal No. 1 and body ground (G101) (see GROUND TO COMPONENTS INDEX ), or repair poor body ground (G101), then go to step 19 19.

  12. Jump the SCS line with the HDS.
  13. Disconnect PCM connector B (49P).
  14. Check for continuity between PCM connector terminal B21 and A/T clutch pressure control solenoid valve C connector terminal No. 2.
    Fig 3: Checking Continuity Between PCM Connector Terminal B21 And A/T Clutch Pressure Control Solenoid Valve C Connector Terminal No. 2
    G06966881Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step 15.

    NO  -Repair an open in the wire between A/T clutch pressure control solenoid valve C connector terminal No. 2 and PCM connector terminal B21, then go to step  19.

  15. Check for continuity between A/T clutch pressure control solenoid valve C connector terminal No. 2 and body ground.
    Fig 4: Checking Continuity Between A/T Clutch Pressure Control Solenoid Valve C Connector Terminal No. 2 And Body Ground
    G06966882Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short to body ground in the wire between PCM connector terminal B21 and A/T clutch pressure control solenoid valve C connector terminal No. 2, then go to step  19.

    NO  -Go to step 16.

  16. Disconnect PCM connector A (49P).
  17. Turn the ignition switch to ON (II).
  18. Measure the voltage between PCM connector terminal A1 and body ground.
    Fig 5: Measuring Voltage Between PCM Connector Terminal A1 And Body Ground
    G00522709Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step  25.

    NO  -Check for a blown No. B5 (7.5 A) fuse in the under-hood fuse/relay box If the fuse is blown, replace it. If the fuse blows again, repair a short in the No. B5 (7.5 A) fuse circuit. If the fuse is OK, repair an open in the wire between PCM connector terminal A1 and the under-hood fuse/relay box, then go to step 19.

  19. Reconnect all connectors.
  20. Turn the ignition switch to ON (II).
  21. Clear the DTC with the HDS.
  22. Start the engine, and wait for at least 1 second.
  23. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P0970 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 24.

  24. Monitor the OBD status for P0970 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  23, go to the INDICATED DTC'S TROUBLESHOOTING .

    NO  -If the HDS 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 HDS indicates NOT COMPLETED, go to step  22.

  25. Reconnect all connectors.
  26. Update the PCM if it does not have the latest software (see PCM UPDATE ), or substitute a known-good PCM (see SUBSTITUTING THE PCM ).
  27. Start the engine, and wait for at least 1 second.
  28. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P0970 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 (see SUBSTITUTING THE 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 P0970 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 (see PCM REPLACEMENT ). If any other Pending or Confirmed 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 A/T clutch pressure control solenoid valve C and the PCM. If the PCM was updated, substitute a known-good PCM (see SUBSTITUTING THE 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.

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