DTC U0114: F-CAN Malfunction (PCM-VTM-4 Control Unit)
- Turn the ignition switch to ON (II).
- Check for Pending DTCs or Confirmed DTCs with the HDS.
Are DTC U0029 and U0114 indicated at the same time?
YES -Go to troubleshooting for DTC U0029 (see DTC U0029: F-CAN MALFUNCTION (BUS-OFF (PCM)) ).
NO -Go to step 3.
- Clear the DTC with the HDS.
- Check for Pending DTCs or Confirmed DTCs with the HDS.
Is DTC U0114 indicated?
YES -Go to step 5.
NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the VTM-4 control unit and the PCM.
- Check for communication to the VTM-4 system with the HDS.
Is DTC U0114 indicated?
YES -Go to step 6.
NO -Go to symptom troubleshooting for VTM-4 LOCK indicator comes on when the ignition switch is turned ON (II) and does not go off (see THE VTM-4 LOCK INDICATOR COMES ON WHEN THE IGNITION SWITCH IS TURNED ON (II) AND DOES NOT GO OFF ).
- Check for VTM-4 system DTCs in the DTCs MENU with the HDS.
Is TCS DTC 41 indicated?
YES -Go to the VTM-4 system's DTC troubleshooting (see GENERAL TROUBLESHOOTING INFORMATION ).
NO -Go to step 7.
- Turn the ignition switch to LOCK (0).
- Jump the SCS line with the HDS.
- Disconnect VTM-4 control unit connector A (22P).
- Disconnect PCM connector A (49P).
- Check for continuity between PCM connector terminal A48 and VTM-4 control unit connector A (22P) terminal No. 11.Fig 1: Connecting VTM-4 Control Unit Connector A (22P) Terminal No. 11 To Body Ground With Jumper Wire
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Go to step 12.
NO -Repair open in the wire between the PCM (A48) and the VTM-4 control unit, then Go to step 13.
- Check for continuity between PCM connector terminal A49 and VTM-4 control unit connector A (22P) terminal No. 22.Fig 2: Checking For Continuity Between Pcm Connector Terminal A49 And Vtm-4 Control Unit Connector A (22P) Terminal No. 22
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Substitute a known-good VTM-4 control unit (see VTM-4 CONTROL UNIT REPLACEMENT ), then Go to step 13 and recheck. If DTC U0114 is not indicated after substitution, replace the original VTM-4 control unit (see VTM-4 CONTROL UNIT REPLACEMENT ), then Go to step 13.
NO -Repair open in the wire between the PCM (A49) and the VTM-4 control unit, then Go to step 13.
- Reconnect all connectors.
- Turn the ignition switch to ON (II).
- Reset the PCM with the HDS.
- Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).
- Check for Pending DTCs or Confirmed DTCs with the HDS.
Is DTC U0114 indicated?
YES -Check for poor connections or loose terminals at the VTM-4 control unit and the PCM, then Go to step 1.
NO -Troubleshooting is complete. If any other Pending DTCs or Confirmed DTCs are indicated, Go to the indicated DTC's troubleshooting. ■