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DTC P0502: Problem in CVT Speed Sensor Circuit

WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. 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.
  1. Check for proper vehicle speed sensor installation (see VEHICLE SPEED SENSOR REPLACEMENT  ). If the sensor is installed incorrectly, reinstall the sensor correctly, then go to step  26.
  2. Turn the ignition switch to ON (II).
  3. Clear the DTC with the HDS.
  4. Block the rear wheels, and raise the front of the vehicle. Make sure it is securely supported, and allow the front wheels to rotate freely, or raise the vehicle on a lift.
  5. Start the engine, disable the VSA by pressing the VSA OFF button (if equipped), run the vehicle with the shift lever in D, and the engine speed at 4,500 rpm or higher, then release the accelerator without pressing it again, for at least 6 seconds.
  6. Monitor the OBD STATUS for P0502 in the DTCs MENU with the HDS.

    Does the HDS indicate FAILED? 

    YES  -Go to step 7.

    NO  -If the HDS indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals between the PCM and the vehicle speed sensor. If the HDS indicates NOT COMPLETED, go to step  5.

  7. Turn the ignition switch to LOCK (0).
  8. Jump the SCS line with the HDS.
  9. Disconnect PCM connector C (44P).
  10. Check for continuity between PCM connector terminal C40 and body ground, and between PCM connector terminal C44 and body ground.
    Fig 1: Checking Continuity Between PCM Connector Terminal C40 And Body Ground
    G06430058Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step 11.

    NO  -Repair an open in the wires between PCM connector terminals C40, C44, and body ground (G101), or repair poor body ground (G101), then go to step  26.

  11. Connect PCM connector C (44P).
  12. Disconnect the vehicle speed sensor connector.
  13. Turn the ignition switch to ON (II).
  14. Measure the voltage between vehicle speed sensor connector terminal No. 1 and body ground.
    Fig 2: Measuring Voltage Between Vehicle Speed Sensor Connector Terminal 1 And Body Ground
    G06430059Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 5 V? 

    YES  -Go to step  19.

    NO  -Go to step 15.

  15. Turn the ignition switch to LOCK (0).
  16. Jump the SCS line with the HDS.
  17. Disconnect PCM connector B (44P).
  18. Check for continuity between PCM connector terminal B6 and vehicle speed sensor connector terminal No. 1.
    Fig 3: Checking Continuity Between PCM Terminal B6 And Vehicle Speed Sensor Connector Terminal 1
    G06430060Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step  32.

    NO  -Repair an open in the wire between PCM connector terminal B6 and vehicle speed sensor, then go to step  26.

  19. Measure the voltage between vehicle speed sensor connector terminals No. 2 and No. 3.
    Fig 4: Measuring Voltage Between Vehicle Speed Sensor Connector Terminals 2 And 3
    G06430061Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 5 V? 

    YES  -Replace the vehicle speed sensor (see VEHICLE SPEED SENSOR REPLACEMENT  ), then go to step  26.

    NO  -Go to step 20.

  20. Turn the ignition switch to LOCK (0).
  21. Jump the SCS line with the HDS.
  22. Disconnect PCM connector B (44P).
  23. Check for continuity between vehicle speed sensor connector terminal No. 2 and body ground.
    Fig 5: Checking Continuity Between Vehicle Speed Sensor Connector Terminal 2 And Body Ground
    G06430062Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short to body ground in the wire between PCM connector terminal B34 and the vehicle speed sensor connector, then go to step  26.

    NO  -Go to step 24.

  24. Check for continuity between PCM connector terminal B41 and vehicle speed sensor connector terminal No. 3.
    Fig 6: Checking Continuity Between PCM Terminal B41 And Vehicle Speed Sensor Connector Terminal 3
    G06430063Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step 25.

    NO  -Repair an open in the wire between the vehicle speed sensor connector and PCM connector terminal B41, then go to step  26.

  25. Check for continuity between PCM connector terminal B34 and vehicle speed sensor connector terminal No. 2.
    Fig 7: Checking Continuity Between PCM Terminal B34 And Vehicle Speed Sensor Connector Terminal 2
    G06430064Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step  32.

    NO  -Repair an open in the wire between PCM connector terminal B34 and the vehicle speed sensor, then go to step 26.

  26. Reconnect all connectors.
  27. Turn the ignition switch to ON (II).
  28. Clear the DTC with the HDS.
  29. Start the engine, disable the VSA by pressing the VSA OFF button (if equipped), run the vehicle with the shift lever in D, and the engine speed at 4,500 rpm or higher, then release the accelerator without pressing it again, for at least 7 seconds.
  30. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P0502 indicated? 

    YES  -Check for poor connections or loose terminals between the vehicle speed sensor and the PCM, then go to step  1.

    NO  -Go to step 31.

  31. Monitor the OBD STATUS for P0502 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 30, go to the indicated DTC's troubleshooting.

    NO  -If the HDS indicates FAILED, check for poor connections or loose terminals between the vehicle speed sensor and the PCM, then go to step  1. If the HDS indicates NOT COMPLETED, go to step  29.

  32. Reconnect all connectors.
  33. Update the PCM if it does not have the latest software (see PCM UPDATE ), or substitute a known-good PCM (see SUBSTITUTING THE PCM ).
  34. Start the engine, disable the VSA by pressing the VSA OFF button (if equipped), run the vehicle with the shift lever in D, and the engine speed at 4,500 rpm or higher, then release the accelerator without pressing it again, for at least 7 seconds.
  35. Check for Pending or Confirmed DTCs with the HDS.

    Is DTC P0502 indicated? 

    YES  -Check for poor connections or loose terminals between the vehicle speed sensor and the PCM. If the PCM was updated, substitute a known-good PCM (see SUBSTITUTING THE PCM ), then go to step  34. If the PCM was substituted, go to step  2.

    NO  -Go to step 36.

  36. Monitor the OBD STATUS for P0502 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 35, go to the indicated DTC's troubleshooting.

    NO  -If the HDS indicates FAILED, check for poor connections or loose terminals between the vehicle speed sensor and the PCM. If the PCM was updated, substitute a known-good PCM (see SUBSTITUTING THE PCM ), then go to step  34. If the PCM was substituted, go to step  1. If the HDS indicates NOT COMPLETED, go to step  34.

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