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Home >> Honda >> 2012 >> CR-Z Base, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (CVT) >> CVT >> DTC Troubleshooting >> DTC P0502: CVT Speed Sensor Circuit Open/Short
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DTC P0502: CVT Speed Sensor Circuit Open/Short

WARNING: This page is about a different variant/trim than selected.
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  22.
  2. Turn the ignition switch to ON (II).
  3. Clear the DTC with the HDS.
  4. Raise the vehicle on a lift, or apply the parking brake, 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.
  5. Start the engine, disable the VSA by pressing the VSA OFF button, 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. Slow down and stop the wheels.
  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. Disconnect the vehicle speed sensor 3P connector.
  9. Turn the ignition switch to ON (II).
  10. Measure the voltage between vehicle speed sensor 3P connector terminal No. 3 and body ground.
    Fig 1: Measuring Voltage Between Vehicle Speed Sensor 3P Connector Terminal No. 3 And Body Ground
    G06950917Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 5 V? 

    YES  -Go to step  15.

    NO  -Go to step  11.

  11. Turn the ignition switch to LOCK (0).
  12. Jump the SCS line with the HDS.
  13. Disconnect PCM connector B (44P).
  14. Check for continuity between PCM connector terminal B6 and vehicle speed sensor 3P connector terminal No. 3.
    Fig 2: Checking For Continuity Between PCM Connector Terminal B6 And Vehicle Speed Sensor 3P Connector Terminal No. 3
    G06950918Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step  28.

    NO  -Repair an open in the wire between PCM connector terminal B6 and vehicle speed sensor 3P connector, then go to step  22.

  15. Measure the voltage between vehicle speed sensor 3P connector terminals No. 1 and No. 2.
    Fig 3: Measuring Voltage Between Vehicle Speed Sensor 3P Connector Terminals No. 1 And No. 2
    G06950919Courtesy 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  22.

    NO  -Go to step  16.

  16. Turn the ignition switch to LOCK (0).
  17. Jump the SCS line with the HDS.
  18. Disconnect PCM connector B (44P).
  19. Check for continuity between vehicle speed sensor 3P connector terminal No. 2 and body ground.
    Fig 4: Checking For Continuity Between Vehicle Speed Sensor 3P Connector Terminal No. 2 And Body Ground
    G06950920Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short in the wire between PCM connector terminal B34 and the vehicle speed sensor 3P connector, then go to step  22.

    NO  -Go to step  20.

  20. Check for continuity between PCM connector terminal B41 and vehicle speed sensor 3P connector terminal No. 1.
    Fig 5: Checking For Continuity Between Pcm Connector Terminal B41 And Vehicle Speed Sensor 3P Connector Terminal No. 1
    G06950921Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step  21.

    NO  -Repair an open in the wire between PCM connector terminal B41 and the vehicle speed sensor 3P connector, then go to step  22.

  21. Check for continuity between PCM connector terminal B34 and vehicle speed sensor 3P connector terminal No. 2.
    Fig 6: Checking For Continuity Between PCM Connector Terminal B34 And Vehicle Speed Sensor 3P Connector Terminal No. 2
    G06950922Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step  28.

    NO  -Repair an open in the wire between PCM connector terminal B34 and the vehicle speed sensor 3P connector, then go to step  22.

  22. Reconnect all connectors.
  23. Turn the ignition switch to ON (II).
  24. Clear the DTC with the HDS.
  25. Start the engine, disable the VSA by pressing the VSA OFF button, run the vehicle with the shift lever in D, and keep the vehicle at speeds over 25 mph (40 km/h) while monitoring the Output shaft (Driven pulley) Speed RPM in the Data List with the HDS, then release the accelerator without pressing it again, for at least 7 seconds. Slow down and stop the wheels.
  26. 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  27.

  27. 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  26, 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  25.

  28. Reconnect all connectors.
  29. Update the PCM if it does not have the latest software (see ELD REPLACEMENT ), or substitute a known-good PCM (see SUBSTITUTING THE ECM/PCM ).
  30. Start the engine, disable the VSA by pressing the VSA OFF button, run the vehicle with the shift lever in D, and keep the vehicle at speeds over 25 mph (40 km/h) while monitoring the Output shaft (Driven pulley) Speed RPM in the Data List with the HDS, then release the accelerator without pressing it again, for at least 7 seconds. Slow down and stop the wheels.
  31. 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 ECM/PCM ), then go to step  30. If the PCM was substituted, go to step  2.

    NO  -Go to step  32.

  32. 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 ECM/PCM REPLACEMENT ). If any other Pending or Confirmed DTCs were indicated in step  31, 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 ECM/PCM ), then go to step  30. If the PCM was substituted, go to step  1. If the HDS indicates NOT COMPLETED, go to step  30.

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