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DTC 86: F-CAN Communication

  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with the HDS.
  3. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.
  4. Check for DTCs with the HDS.

    Is DTC 86 indicated? 

    YES  -Go to step 5.

    NO  -The system is OK at this time.

  5. Clear the DTC with the HDS.
  6. Start and run the engine for at least 5 seconds.
  7. Check for DTCs with the HDS.

    Is DTC 86 indicated? 

    YES  -Go to step 8.

    NO  -Intermittent failure, the F-CAN communication line is OK at this time.

  8. Turn the ignition switch to LOCK (0).
  9. Short the SCS line with the HDS.
  10. Disconnect ECM connector E (31P).
  11. Disconnect the VSA modulator-control unit 47P connector (see step 2 on VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ).
  12. Check for continuity between VSA modulator-control unit 47P connector terminals No. 11, No. 15 and ECM connector E(31P) terminals No. 11, No. 24 individually.
    Fig 1: Checking Continuity Between VSA Modulator-Control Unit 47P Connector Terminals No. 11, No. 15 And ECM Connector E(31P) Terminals No. 11, No. 24
    G06232161Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step 13.

    NO  -Repair open in the wire between the VSA modulator-control unit and the ECM.

  13. Remove and check the No. 6 (15 A) fuse in the under-dash fuse/relay box.

    Is the fuse blown? 

    YES  -Go to step 14.

    NO  -Reinstall the checked fuse, then go to step  21.

  14. Disconnect the steering angle sensor 5P connector.
  15. Check for continuity between steering angle sensor 5P connector terminal No. 5 and body ground.
    Fig 2: Checking Continuity Between Steering Angle Sensor 5P Connector Terminal No. 5 And Body Ground
    G06232162Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair short to body ground in the wire between the No. 6 (15 A) fuse in the under-dash fuse/relay box and the steering angle sensor or the VSA modulator-control unit.

    NO  -Install a new No. 6(15 A) fuse in the under-dash fuse/relay box, then go to step 16.

  16. Reconnect all connectors.
  17. Turn the ignition switch to ON (II).
  18. Clear the DTC with the HDS.
  19. Start and run the engine for at least 5 seconds.
  20. Check for DTCs with the HDS.

    Is DTC 86 indicated? 

    YES  -Replace the VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ).

    NO  -Troubleshooting is complete.

  21. Turn the ignition switch to ON (II).
  22. Measure the voltage between steering angle sensor 5P connector terminal No. 5 and body ground.
    Fig 3: Measuring Voltage Between Steering Angle Sensor 5P Connector Terminal No. 5 And Body Ground
    G06232163Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step 23.

    NO  -Repair open in the wire between the No. 6 (15 A) fuse in the under-dash fuse/relay box and the steering angle sensor.

  23. Turn the ignition switch to LOCK (0).
  24. Check for continuity between steering angle sensor 5P connector terminal No. 1 and body ground.
    Fig 4: Checking Continuity Between Steering Angle Sensor 5P Connector Terminal No. 1 And Body Ground
    G06232164Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Replace the steering angle sensor (see REPLACEMENT ).

    NO  -Repair open in the wire between the steering angle sensor and body ground (G401).

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