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Home >> Acura >> 2009 >> CSX Base, Standard >> 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 ON (II).
  2. Clear the DTC with the HDS:
  3. Turn the ignition switch OFF, then turn it ON (II) again.
  4. Check for DTCs with the HDS.

    Is 86-31 DTC indicated? 

    YES  -If the DTC 86-01 is indicated at the same time, do the DTC 86-01 troubleshooting (see DTC 84-21: VSA SENSOR NEUTRAL POSITION NOT WRITING ). If 86-01 is not indicated, go to step 5.

    NO  -If any DTCs are indicated, go to the indicated DTCs troubleshooting. If DTCs are not indicated, intermittent failure, the system is OK at this time. Check for loose terminals between the gauge control module (tach) 36P connector and the VSA modulator-control unit 37P connector. Refer to intermittent failures troubleshooting (see DIAGNOSTIC TROUBLE CODE (DTC) ).

  5. Turn the ignition switch ON (II).

    Do 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 OFF.
  7. Disconnect the gauge control module (tach) 36P connector.
  8. Disconnect the VSA modulator-control unit 37P connector.
  9. Check for continuity between the VSA modulator-control unit 37P connector terminal and gauge control module (tach) 36P connector terminal (see table).
    VSA MODULATOR-CONTROL UNIT REFERENCE

    Sign Connector Terminal No.
    VSA Modulator-control Unit Gauge Control Module (Tach)
    CAN-L 1 19
    CAN-H 15 1
    Fig 1: Checking Continuity Between VSA Modulator-Control Unit 37P Connector Terminal And Gauge Control Module (TACH) 36P Connector Terminal
    G06267955Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Check for loose terminals in the gauge control module (tach) 36P connector. If necessary, substitute a known-good gauge control module (tach), then go to step 1 and recheck. If no DTCs are indicated, replace the original gauge control module (tach) (see GAUGE CONTROL MODULE REPLACEMENT ). If DTC 86-31 resets, replace the VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ).

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

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