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Home >> Honda >> 2011 >> Pilot EX, 3.5 4 >> Repair and Diagnosis >> Brakes >> Traction Control >> VSA (Vehicle Stability Assist) System Components >> DTC Troubleshooting >> DTC 86-31: F-CAN Communication With Gauge Control Module Malfunction

DTC 86-31: F-CAN Communication With Gauge Control Module Malfunction

  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 86-31 indicated? 

    YES  - If DTC 86-01 is indicated at the same time, do the DTC 86-01 troubleshooting first (see DTC 86-01: F-CAN BUS-OFF MALFUNCTION  ). If the DTC 86-01 is not indicated, go to step  5.

    NO  - If any other DTCs are indicated, go to the indicated DTC's troubleshooting. If DTCs are not indicated, there was an intermittent failure, the system is OK at this time. Check for loose terminals between the gauge control module 32P connector and the VSA modulator-control unit 36P connector. Refer to INTERMITTENT FAILURES  . ■

  5. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.

    Does the gauge indicators come on? 

    YES  - Go to step  6.

    NO  - Do the gauge control module troubleshooting (see SELF-DIAGNOSTIC FUNCTION ). ■

  6. Turn the ignition switch to LOCK (0).
  7. Disconnect the gauge control module 32P connector.
  8. Disconnect the VSA modulator-control unit 36P connector (see step  4 ).
  9. Check for continuity between the VSA modulator-control unit 36P connector terminal and gauge control module 32P connector terminal (see table below).
    CONNECTOR TERMINAL REFERENCE TABLE

    Sign VSA Modulator-control Unit 36P Connector Terminal Gauge Control Module 32P Connector Terminal
    CAN-L No. 1 No. 29
    CAN-H No. 14 No. 30

    Is there continuity? 

    YES  - Check for loose terminals in the gauge control module 32P connector. If necessary, substitute a known-good gauge control module, then go to step  1, and recheck. If no DTCs are indicated, replace the original gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ). If DTC 86-31 resets, go to step  10.

    NO  - Repair open in the wire between the gauge control module and the VSA modulator-control unit. ■

    Fig 1: Checking Continuity Between VSA Modulator-Control Unit 36P Connector Terminal & Gauge Control Module 32P Connector Terminal
    G05962987Courtesy of AMERICAN HONDA MOTOR CO., INC.
  10. Reconnect all connectors.
  11. Update the VSA modulator-control unit if it does not have the latest software (see VSA MODULATOR-CONTROL UNIT UPDATE  ). If the unit already has the latest software, substitute a known-good VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION  ).
  12. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.
  13. Check for DTCs with the HDS.

    Is DTC 86-31 indicated? 

    YES  - Check for loose terminals in the VSA modulator-control unit 36P connector. If the VSA modulator-control unit was updated, substitute a known-good VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION  ), then retest. If the VSA modulator-control unit was substituted, go to step  1.

    NO  - If the VSA modulator-control unit was updated, troubleshooting is complete. If the VSA modulator-control unit was substituted, replace the original VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION  ). If any other DTCs are indicated, go to the indicated DTC's troubleshooting. ■

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