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DTC P0974: Shift Solenoid Valve A (Open)

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 in P, and wait for at least 1 second.
  4. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P0974 indicated? 

    YES  -Go to step  8.

    NO  -Go to step 5.

  5. Select Shift Solenoid Valve A in the Miscellaneous Test Menu, and test shift solenoid valve A with the HDS.

    Is a clicking sound heard? 

    YES  -Go to step 6.

    NO  -Go to step  8.

  6. Start the engine in P, and wait for at least 1 second.
  7. Monitor the OBD status for P0974 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 shift solenoid valve A and the PCM. If the HDS indicates NOT COMPLETED, go to step  5.

  8. Turn the ignition switch to LOCK (0).
  9. Jump the SCS line with the HDS.
  10. Disconnect PCM connectors B (49P) and C (49P).
  11. Turn the ignition switch to ON (II).
  12. Measure the voltage between PCM connector terminal B2 and body ground.
    Fig 1: Measuring Voltage Between PCM Connector Terminal B2 And Body Ground
    G06966887Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step 13.

    NO  -Check for a blown No. B3 (15 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. B3 (15 A) fuse circuit. If the fuse is OK, repair an open in the wire between PCM connector terminal B2 and the under-hood fuse/relay box, then go to step  19.

  13. Turn the ignition switch to LOCK (0).
  14. Measure the resistance between PCM connector terminal C28 and body ground.
    Fig 2: Measuring Resistance Between PCM Connector Terminal C28 And Body Ground
    G06966888Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there 12-25Ω? 

    YES  -Go to step  25.

    NO  -Go to step 15.

  15. Disconnect the shift solenoid wire harness connector.
  16. Check for continuity between PCM connector terminal C28 and shift solenoid wire harness connector terminal No. 3.
    Fig 3: Checking Continuity Between PCM Connector Terminal C28 And Shift Solenoid Wire Harness Connector Terminal No. 3
    G06966889Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step 17.

    NO  -Repair an open in the wire between PCM connector terminal C28 and the shift solenoid wire harness connector terminal, then go to step  19.

  17. Remove the shift solenoid wire harness (see SHIFT SOLENOID VALVE TEST, REPLACEMENT, AND SHIFT SOLENOID WIRE HARNESS REPLACEMENT  ).
  18. Check for continuity between shift solenoid wire harness connector terminal No. 3 and the shift solenoid valve A connector terminal.
    Fig 4: Checking Continuity Between Shift Solenoid Wire Harness Connector Terminal No. 3 And Shift Solenoid Valve A Connector Terminal
    G06966890Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Replace shift solenoid valve A (see SHIFT SOLENOID VALVE TEST, REPLACEMENT, AND SHIFT SOLENOID WIRE HARNESS REPLACEMENT  ), then go to step  22.

    NO  -Replace the shift solenoid wire harness (see SHIFT SOLENOID VALVE TEST, REPLACEMENT, AND SHIFT SOLENOID WIRE HARNESS REPLACEMENT  ), then go to step  22.

  19. Reconnect all connectors.
  20. Turn the ignition switch to ON (II).
  21. Clear the DTC with the HDS.
  22. Start the engine in P. With the brake pedal pressed, shift to R, and wait for at least 1 second, then move the shift lever back into P.
  23. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P0974 indicated? 

    YES  -Check for poor connections or loose terminals between shift solenoid valve A and the PCM, then go to step  1.

    NO  -Go to step 24.

  24. Monitor the OBD status for P0974 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 shift solenoid valve A 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 in P. With the brake pedal pressed, shift to R, and wait for at least 1 second, then move the shift lever back into P.
  28. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P0974 indicated? 

    YES  -Check for poor connections or loose terminals between shift solenoid valve A 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 P0974 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 shift solenoid valve A 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.



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 in P, and wait for at least 1 second.
  4. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P0974 indicated? 

    YES  -Go to step  8.

    NO  -Go to step 5.

  5. Select Shift Solenoid Valve A in the Miscellaneous Test Menu, and test shift solenoid valve A with the HDS.

    Is a clicking sound heard? 

    YES  -Go to step 6.

    NO  -Go to step  8.

  6. Start the engine in P, and wait for at least 1 second.
  7. Monitor the OBD status for P0974 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 shift solenoid valve A and the PCM. If the HDS indicates NOT COMPLETED, go to step  5.

  8. Turn the ignition switch to LOCK (0).
  9. Jump the SCS line with the HDS.
  10. Disconnect PCM connectors B (49P) and C (49P).
  11. Measure the resistance between PCM connector terminal C20 and body ground.
    Fig 1: Measuring Resistance Between PCM Connector Terminal C20 And Body Ground
    G00522710Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there 12-25Ω? 

    YES  -Go to step  22.

    NO  - Go to step 12.

  12. Disconnect the shift solenoid wire harness connector.
  13. Check for continuity between PCM connector terminal C20 and shift solenoid wire harness connector terminal No. 3.
    Fig 2: Checking Continuity Between PCM Connector Terminal C20 And Shift Solenoid Wire Harness Connector Terminal No. 3
    G00522711Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step 14.

    NO  -Repair an open in the wire between PCM connector terminal C20 and the shift solenoid wire harness connector terminal No. 3, then go to step  16.

  14. Remove the shift solenoid wire harness (see SHIFT SOLENOID VALVE TEST, REPLACEMENT, AND SHIFT SOLENOID WIRE HARNESS REPLACEMENT ).
  15. Check for continuity between shift solenoid wire harness connector terminal No. 3 and the shift solenoid valve A connector terminal.
    Fig 3: Checking Continuity Between Shift Solenoid Wire Harness Connector Terminal No. 3 And Shift Solenoid Valve A Connector Terminal
    G06966890Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Replace shift solenoid valve A (see SHIFT SOLENOID VALVE TEST, REPLACEMENT, AND SHIFT SOLENOID WIRE HARNESS REPLACEMENT  ), then go to step  19.

    NO  -Replace the shift solenoid wire harness (see SHIFT SOLENOID VALVE TEST, REPLACEMENT, AND SHIFT SOLENOID WIRE HARNESS REPLACEMENT  ), then go to step  19.

  16. Reconnect all connectors.
  17. Turn the ignition switch to ON (II).
  18. Clear the DTC with the HDS.
  19. Start the engine in P. With the brake pedal pressed, shift to R, and wait for at least 1 second, then move the shift lever back into P.
  20. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P0974 indicated? 

    YES  -Check for poor connections or loose terminals between shift solenoid valve A and the PCM, then go to step  1.

    NO  -Go to step 21.

  21. Monitor the OBD status for P0974 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 shift solenoid valve A 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 in P. With the brake pedal pressed, shift to R, and wait for at least 1 second, then move the shift lever back into P.
  25. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P0974 indicated? 

    YES  -Check for poor connections or loose terminals between shift solenoid valve A 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 P0974 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 shift solenoid valve A 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.

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