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DTC 23-02: CAN Vehicle Speed Data

NOTE: Clear the DTC related to the VSA.
  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with the HDS.
  3. Turn the ignition switch to LOCK (0).
  4. Start the engine.
  5. Check for DTCs with the HDS.

    Is DTC 23-02 indicated? 

    YES  -Go to step  6.

    NO  -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the EPS control unit.

  6. Turn the ignition switch to LOCK (0).
  7. Short the SCS line with the HDS.
  8. Disconnect ECM/PCM connector A (44P) (see step 14 on ECM/PCM REPLACEMENT ).
  9. Disconnect EPS control unit connector A (11P) (see step  3 ).
  10. Check for continuity between EPS control unit connector A (11P) terminals and ECM/PCM connector A (44P) terminals (see table).
    CONNECTOR TERMINAL DESCRIPTION

    Sign EPS Control Unit Connector A (11P) Terminal ECM/PCM Connector A (44P) Terminal
    F-CAN L No. 9 No. 37
    F-CAN H No. 7 No. 36
    Fig 1: Checking Continuity Between EPS Control Unit Connector A (11P) Terminals And ECM/PCM Connector A (44P) Terminals
    G06952889Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step  11.

    NO  -Repair an open in the wire between the EPS control unit and the ECM/PCM.

  11. Reconnect ECM/PCM connector A (44P).
  12. Reconnect EPS control unit connector A (11P).
  13. Raise and support the vehicle (see LIFT AND SUPPORT POINTS ), and allow all wheels to rotate freely.
  14. Start the engine.
  15. Turn off the VSA function by using the VSA OFF switch.
  16. Run the vehicle in 4th gear (MT) or D (CVT).
  17. Check the VEHICLE SPEED in the EPS DATA LIST with the HDS.

    Is the vehicle speed indicated? 

    YES  -Check for loose terminals in the EPS control unit connectors, and repair if necessary. If no poor connections are found, replace the EPS control unit (see EPS CONTROL UNIT REMOVAL/INSTALLATION  ).

    NO  -Update the ECM/PCM if it does not have the latest software (see ELD REPLACEMENT ), or substitute a known-good ECM/PCM (see SUBSTITUTING THE ECM/PCM ), then go to step  1 and recheck. If the ECM/PCM was updated and DTCs are not indicated, troubleshooting is complete. If the ECM/PCM was substituted and DTCs are not indicated, replace the original ECM/PCM (see ECM/PCM REPLACEMENT ).

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