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DTC P0973: Shift Solenoid Valve A (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. With the brake pedal pressed, shift to R, and wait for at least 1 second.
  4. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P0973 indicated? 

    YES  -Go to step  8.

    NO  -Go to step 5.

  5. Select Shift Solenoid Valve A in the Miscellaneous Test Menu, and test the 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. With the brake pedal pressed, shift to R, and wait for at least 1 second.
  7. Monitor the OBD status for P0973 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 an intermittent short to body ground in the wire between shift solenoid valve A and the PCM. If the HDS indicates NOT COMPLETED, go to step  5.

  8. Check for a blown No. B3 (15 A) fuse in the under-hood fuse/relay box.

    Is the No. B3 (15 A) fuse OK? 

    YES  -Go to step 9.

    NO  -Replace the fuse, then go to step  20. If the fuse blows again, repair short in the B3 (15 A) fuse circuit. Then go to step 9.

  9. Turn the ignition switch to LOCK (0).
  10. Jump the SCS line with the HDS.
  11. Disconnect PCM connector C (49P).
  12. Measure the resistance between PCM connector terminal C28 and body ground.
    Fig 1: Measuring Resistance Between PCM Connector Terminal C28 And Body Ground
    G06966884Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there less than 12 Ω? 

    YES  -Go to step 13.

    NO  -Go to step  25.

  13. Disconnect the shift solenoid wire harness connector.
  14. Check for continuity between PCM connector terminal C28 and body ground.
    Fig 2: Checking Continuity Between PCM Connector Terminal C28 And Body Ground
    G06966885Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short to body ground in the wire between PCM connector terminal C28 and the shift solenoid wire harness connector, then go to step  19.

    NO  -Go to step 15.

  15. Inspect shift solenoid valve A (see SHIFT SOLENOID VALVE TEST, REPLACEMENT, AND SHIFT SOLENOID WIRE HARNESS REPLACEMENT  ).

    Is shift solenoid valve A OK? 

    YES  -Go to step 16.

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

  16. Disconnect PCM connector B (49P).
  17. Turn the ignition switch to ON (II).
  18. Measure the voltage between PCM connector terminal B2 and body ground.
    Fig 3: Measuring Voltage Between PCM Connector Terminal B2 And Body Ground
    G06966886Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step  25.

    NO  -Repair an open in the wire between PCM connector terminal B2 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 in P. With the brake pedal pressed, shift to the 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 P0973 Indicated? 

    YES  -Check for an intermittent short to body ground in the wire between shift solenoid valve A and the PCM, then go to step  1.

    NO  -Go to step 24.

  24. Monitor the OBD status for P0973 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 an intermittent short to body ground in the wire 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 the 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 P0973 indicated? 

    YES  -Check for an intermittent short to body ground in the wire 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 P0973 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 an intermittent short to body ground in the wire 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. With the brake pedal pressed, shift to R, and wait for at least 1 second.
  4. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P0973 indicated? 

    YES  -Go to step  8.

    NO  -Go to step 5.

  5. Select Shift Solenoid Valve A in the Miscellaneous Test Menu, and test the 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. With the brake pedal pressed, shift to R, and wait for at least 1 second.
  7. Monitor the OBD status for P0973 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 an intermittent short to body ground in the wire 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 connector 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 less than 12 Ω? 

    YES  -Go to step 12.

    NO  -Go to step  21.

  12. Disconnect the shift solenoid wire harness connector.
  13. Check for continuity between PCM connector terminal C20 and body ground.
    Fig 2: Checking continuity Between PCM Connector Terminal C20 And Body Ground
    G00522710Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short to body ground in the wire between PCM connector terminal C20 and the shift solenoid wire harness connector, then go to step 15.

    NO  -Go to step 14.

  14. Inspect shift solenoid valve A (see SHIFT SOLENOID VALVE TEST, REPLACEMENT, AND SHIFT SOLENOID WIRE HARNESS REPLACEMENT  ).

    Is shift solenoid valve A OK? 

    YES  -Go to step  21.

    NO  -Replace shift solenoid valve A or the shift solenoid wire harness (see SHIFT SOLENOID VALVE TEST, REPLACEMENT, AND SHIFT SOLENOID WIRE HARNESS REPLACEMENT  ), then go to step  18.

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

    Is DTC P0973 Indicated? 

    YES  -Check for an intermittent short to body ground in the wire between shift solenoid valve A and the PCM, then go to step  1.

    NO  -Go to step 20.

  20. Monitor the OBD status for P0973 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  19, go to the INDICATED DTC'S TROUBLESHOOTING .

    NO  -If the HDS indicates FAILED, check for an intermittent short to body ground in the wire between shift solenoid valve A and the PCM, then go to step  1. If the HDS indicates NOT COMPLETED, go to step  18.

  21. Reconnect all connectors.
  22. Update the PCM if it does not have the latest software (see PCM UPDATE ), or substitute a known-good PCM (see SUBSTITUTING THE PCM ).
  23. Start the engine in P. With the brake pedal pressed, shift to the R, and wait for at least 1 second, then move the shift lever back into P.
  24. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P0973 indicated? 

    YES  -Check for an intermittent short to body ground in the wire 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  23. If the PCM was substituted, go to step  1.

    NO  -Go to step 25.

  25. Monitor the OBD status for P0973 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  24, go to the INDICATED DTC'S TROUBLESHOOTING .

    NO  -If the HDS indicates FAILED, check for an intermittent short to body ground in the wire 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  23. If the PCM was substituted, go to step  1. If the HDS indicates NOT COMPLETED, go to step  23.

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