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DTC P0500: VSS Circuit Malfunction

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).
  1. Turn the ignition switch ON (II).
  2. Clear the DTC with the HDS.
  3. Test-drive under these conditions:
    • Transmission in 3rd gear
    • Engine speed between 2,000-4,000 rpm
    • Drive for several minutes, then decelerate (with the throttle fully closed) for 5 seconds
  4. Check for Temporary DTCs or DTCs with the HDS.

    Is DTC P0500 indicated? 

    YES  - Go to step  5.

    NO  - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the VSS and the ECM.

  5. Turn the ignition switch OFF.
  6. Disconnect the VSS 3P connector.
  7. Turn the ignition switch ON (II).
  8. Measure voltage between VSS 3P connector terminal No. 2 and body ground.
    Fig 1: Measuring Voltage Between VSS 3P Connector Terminal No. 2 And Body Ground
    G05454554Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  - Go to step  11.

    NO  - Go to step  9.

  9. Turn the ignition switch OFF.
  10. Check the No. 3 IG METER (10 A) fuse in under-dash fuse/relay box.

    Is the fuse blown? 

    YES  - Repair short in the wire between the VSS and the No. 3 IG METER (10 A) fuse, and replace the No. 3 IG METER (10 A) fuse, then go to step  27.

    NO  - Repair open in the wire between the VSS and the No. 3 IG METER (10 A) fuse, then go to step  27.

  11. Turn the ignition switch OFF.
  12. Disconnect EPS control unit connector D (28P) (see EPS CONTROL UNIT REMOVAL/INSTALLATION ).
  13. Disconnect the gauge control module 40P connector (see GAUGE CONTROL MODULE REPLACEMENT ).
  14. Disconnect the audio system 17P connector (see AUDIO UNIT REMOVAL/INSTALLATION ).
  15. Turn the ignition switch ON (II).
  16. Measure voltage between VSS 3P connector terminal No. 3 and body ground.
    Fig 2: Measuring Voltage Between VSS 3P Connector Terminal No. 3 And Body Ground
    G05454555Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 5 V? 

    YES  - Go to step  23.

    NO  - Go to step  17.

  17. Turn the ignition switch OFF.
  18. Jump the SCS line with the HDS.
  19. Disconnect ECM connector A (31P).
  20. Check for continuity between VSS 3P connector terminal No. 3 and body ground.
    Fig 3: Checking Continuity Between VSS 3P Connector Terminal No. 3 And Body Ground
    G05454556Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  - Repair short in the wire between the ECM (A18), the gauge control module, the EPS control unit, the audio system, and the VSS, then go to step  27.

    NO  - Go to step  21.

  21. Connect VSS 3P connector terminal No. 3 to body ground with a jumper wire.
    Fig 4: Identifying VSS 3P Connector Terminal No. 3 To Body Ground With A Jumper Wire
    G05454557Courtesy of AMERICAN HONDA MOTOR CO., INC.
  22. Check for continuity between ECM connector terminal A18 and body ground.
    Fig 5: Checking Continuity Between ECM Connector Terminal A18 And Body Ground
    G05454558Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  - Go to step  34.

    NO  - Repair open in the wire between the ECM (A18) and the VSS, then go to step  27.

  23. Turn the ignition switch OFF.
  24. Check for continuity between VSS 3P connector terminal No. 1 and body ground.
    Fig 6: Checking Continuity Between VSS 3P Connector Terminal No. 1 And Body Ground
    G05454559Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  - Go to step  25.

    NO  - Repair open in the wire between the VSS and G101, then go to step  27.

  25. Turn the ignition switch OFF.
  26. Replace the VSS (see VSS REPLACEMENT ).
  27. Reconnect all connectors.
  28. Turn the ignition switch ON (II).
  29. Reset the ECM with the HDS.
  30. Do the ECM idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE ).
  31. Test-drive under these conditions:
    • Transmission in 3rd gear
    • Engine speed between 2,000-4,000 rpm
    • Drive for several minutes, then decelerate (with the throttle fully closed) for 5 seconds
  32. Check for Temporary DTCs or DTCs with the HDS.

    Is DTC P0500 indicated? 

    YES  - Check for poor connections or loose terminals at the VSS and the ECM, then go to step  1.

    NO  - Go to step  33.

  33. Monitor the OBD STATUS for DTC P0500 in the DTCs MENU with the HDS.

    Does the screen indicate PASSED? 

    YES  - Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 32, go to the indicated DTCs troubleshooting.

    NO  - If the screen indicates FAILED, check for poor connections or loose terminals at the VSS and the ECM, then go to step  1. If the screen indicates NOT COMPLETED, go to step  31.

  34. Reconnect all connectors.
  35. Update the ECM/PCM if it does not have the latest software (see UPDATING THE ECM/PCM ), or substitute a known-good ECM/PCM (see SUBSTITUTING THE ECM/PCM ).
  36. Test-drive under these conditions:
    • Transmission in 3rd gear
    • Engine speed between 2,000-4,000 rpm
    • Drive for several minutes, then decelerate (with the throttle fully closed) for 5 seconds
  37. Check for Temporary DTCs or DTCs with the HDS.

    Is DTC P0500 indicated? 

    YES  - Check for poor connections or loose terminals at the VSS and the ECM. If the ECM was updated, substitute a known-good ECM (see SUBSTITUTING THE ECM/PCM ), then go to step  36. If the ECM was substituted, go to step  1.

    NO  - Go to step  38.

  38. Monitor the OBD STATUS for DTC P0500 in the DTCs MENU with the HDS.

    Does the screen indicate PASSED? 

    YES  - If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM (see ECM/PCM REPLACEMENT ). If any other Temporary DTCs or DTCs were indicated in step 37, go to the indicated DTCs troubleshooting.

    NO  - If the screen indicates FAILED, check for poor connections or loose terminals at the VSS and the ECM. If the ECM was updated, substitute a known-good ECM (see SUBSTITUTING THE ECM/PCM ), then go to step  36. If the ECM was substituted, go to step  1. If the screen indicates NOT COMPLETED, go to step  36.

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