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DTC U0114: F-CAN Malfunction (VTM-4 Control Unit)

NOTE: If DTC U0073 is stored at the same time as DTC U0114, troubleshoot DTC U0073 first, then recheck for DTC U0114.
  1. Turn the ignition switch ON (II).
  2. Clear the DTC with the HDS.
  3. Check for Temporary DTCs or DTCs with the HDS.

    Is DTC U0114 indicated? 

    YES  - Go to step 4.

    NO  - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the gauge assembly, the VTM-4 control unit, and the PCM.

  4. Check for the DTCs of the VTM-4 system.

    Is VTM-4 DTC 41 indicated? 

    YES  - Go to step 5.

    NO  - Go to step  9.

  5. Turn the ignition switch OFF.
  6. Disconnect VTM-4 control unit Connector A (22P).
  7. Check for continuity between VTM-4 control unit 22P Connector terminals A11 and A22*.
    Fig 1: Checking Continuity Between VTM-4 Control Unit 22P Connector Terminals A11 And A22
    G04545999Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  - Go to step 8.

    NO  - Repair open in the wire between the VTM-4 control unit (A11 (A22)*) and the PCM (A36 (A1)*), then go to step  16.

  8. Check for a poor connection at the dashboard wire harness B/left side wire harness 20P Connector.

    Is the connection OK? 

    YES  - Substitute a known-good VTM-4 control unit, then go to step  16 and recheck. If no DTCs are indicated, replace the original VTM-4 control unit, then go to step  16.

    NO  - Repair the poor connection at the dashboard wire harness B/left side wire harness 20P Connector, then go to step  16.

  9. Turn the ignition switch OFF.
  10. Disconnect VTM-4 control unit Connector A (22P).
  11. Turn the ignition switch ON (II).
  12. Measure voltage between VTM-4 control unit 22P Connector terminal A1 and body ground.
    Fig 2: Measuring Voltage Between VTM-4 Control Unit 22P Connector Terminal A1 And Body Ground
    G04546000Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  - Go to step 13.

    NO  - Check the No. 11 IG1 VTM-4 (7.5 A) fuse in the under-dash fuse/relay box. If the fuse is OK, repair open in the wire between the No. 11 IG1 VTM-4 (7.5 A) fuse and the VTM-4 control unit, then go to step  16.

  13. Turn the ignition switch OFF.
  14. Disconnect VTM-4 control unit Connector B (12P).
  15. Check for continuity between VTM-4 control unit 12P Connector terminal B5 and body ground.
    Fig 3: Checking Continuity Between VTM-4 Control Unit 12P Connector Terminal B5 And Body Ground
    G04546001Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  - Substitute a known-good VTM-4 control unit, then go to step 16 and recheck. If no DTCs are indicated, replace the original VTM-4 control unit, then go to step 16.

    NO  - Repair open in the wire between the VTM-4 control unit and G203, then go to step 16.

  16. Turn the ignition switch ON (II).
  17. Reset the PCM with the HDS.
  18. Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).
  19. Check for Temporary DTCs or DTCs with the HDS.

    Are any Temporary DTCs or DTCs indicated? 

    YES  - If DTC U0114 is indicated, check for poor connections or loose terminals at the gauge assembly, the VTM-4 control unit, and the PCM, then go to step  1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC'S TROUBLESHOOTING .

    NO  - Troubleshooting is complete.

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