FixVault
Home › Acura › 2004 › MDX Base › Repair and Diagnosis › Engine Performance › System › PGM-FI System › DTC Troubleshooting › DTC U0114: F-CAN Malfunction (VTM-4 Control Unit-PCM)

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

NOTE:
  • Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).
  • If the 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.

    Are any Temporary DTCs or DTCs indicated? 

    1. YES  - Go to step 4.
    2. NO  - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the VTM-4 control unit and the PCM.
  4. Check for the DTCs of the VTM-4 system (see GENERAL TROUBLESHOOTING INFORMATION ).

    Is DTC 41 stored? 

    1. YES  - Go to step 5.
    2. NO  - Check the VTM-4 system, then go to step  11.
  5. Turn the ignition switch OFF.
  6. Jump the SCS line with the HDS.
  7. Disconnect PCM connector B (56P).
  8. Disconnect VTM-4 control unit connector A (22P).
  9. Connect VTM-4 control unit connector terminals A11 and A22 to body ground with a jumper wires.
    Fig 1: Connecting VTM - 4 Control Unit Connector Terminals A11 And A22 To Body Ground With Jumper Wires
    G03639804Courtesy of AMERICAN HONDA MOTOR CO., INC.
  10. Check for continuity between PCM connector terminals B15, B16 and body ground, one at a time.
    Fig 2: Checking Continuity Between PCM Connector Terminals B15, B16 And Body Ground
    G03639805Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    1. YES  - VTM-4 control unit internal circuit failure; replace the VTM-4 control unit (see VTM-4 CONTROL UNIT REPLACEMENT ), then go to step  11.
    2. NO  - Repair open in the wire between the PCM and the VTM-4 control unit, then go to step  11.
  11. Turn the ignition switch ON (II).
  12. Clear the DTC with the HDS.
  13. Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).
  14. Check for Temporary DTCs or DTCs with the HDS.

    Are any Temporary DTCs or DTCs indicated? 

    1. YES  - If DTC U0114 is indicated, check for poor connections or loose terminals at 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.
    2. NO  - Troubleshooting is complete.
About FixVault