DTC U0029: F-CAN Communication Line Error
NOTE:
- SRS components are located in this area. Review the SRS component locations (see COMPONENT LOCATION INDEX ), and precautions and procedures (see PRECAUTIONS AND PROCEDURES ) before doing repairs or servicing.
- If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).
- Make sure the HDS communicates with the PCM and other vehicle systems. If it does not, go to DLC Circuit Troubleshooting (see DLC CIRCUIT TROUBLESHOOTING ).
- Clear the DTCs with the HDS.
- Turn the ignition switch to LOCK (0), and then back to ON (II).
- Wait for at least 6 seconds.
- Check for DTCs with the HDS.
Is DTC U0029 indicated?
YES -Go to step 5.
NO -Intermittent failure, the system is OK at this time. Check for loose or poor connections, or worn/shorted wires. If the connections are good, check the battery condition (see BATTERY TEST ) and the charging system.
- Turn the ignition switch to LOCK (0).
- Disconnect the appropriate connector at each control unit in the table one at a time. Clear the DTC, then recheck for DTCs after each unit is disconnected.CONNECTOR REFERENCE CHART
Control Unit Connector Gauge control module 32P connector PCM Connector A (49P) VSA modulator-control unit 32P connector SRS unit Connector A (39P) TPMS control unit 20P connector Yaw rate-acceleration sensor 4P connector Steering angle sensor 5P connector Is DTC U0029 indicated after each individual unit was disconnected?
YES -Go to step 7.
NO -Replace the control unit that was disconnected when DTC U0029 did not set.
- Turn the ignition switch to LOCK (0).
- Disconnect all the control units' connectors in the following table.CONNECTOR REFERENCE CHART
Control Unit Connector Gauge control module 32P connector PCM Connector A (49P) VSA modulator-control unit 32P connector SRS unit Connector A (39P) TPMS control unit 20P connector Yaw rate-acceleration sensor 4P connector Steering angle sensor 5P connector - Disconnect the HDS from the data link connector (DLC).
- Check for continuity between body ground and gauge control module 32P connector terminals No. 19 and No. 20 individually.Fig 1: Checking Continuity Between Body Ground And Gauge Control Module 32P Connector Terminals No. 19 And No. 20
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Repair a short to ground in the F-CAN wire(s).
NO -Go to step 11.
- Check for continuity between gauge control module 32P connector terminals No. 19 and No. 20.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Repair a short in the F-CAN wires.
NO -Replace the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ).