DTC U0029: F-CAN Communication Line Error
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 Honda Odyssey, 2016 Honda Odyssey, 2015 Honda Odyssey, 2014 Honda Odyssey, and 2013 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.
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 ).