DTC U0029: F-CAN Communication Line Error
WARNING: This page is about a different car, the 2011 Acura TL, 2010 Acura TL, and 2009 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
- Make sure the HDS communicates with the ECM/PCM and other vehicle systems If it does not, go to DLC Circuit Troubleshooting (see DLC CIRCUIT TROUBLESHOOTING )
- 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 )
- Clear the DTCs with the HDS
- Turn the ignition switch to LOCK (0) and then back to ON (II), or press the engine start/stop button to select the OFF mode and then the ON mode
- 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), or press the engine start/stop button to select the OFF mode
- 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 disconnectedCONTROL UNIT CONNECTOR REFERENCE
Control Unit Connector Gauge control module 32P connector PCM Connector A (49P) VSA modulator-control unit 47P connector SRS unit Connector A (39P) Audio-navigation unit(1) Connector H (28P) TPMS control unit 20P connector EPS control unit 28P connector Yaw rate-lateral acceleration sensor(2) 4P connector Yaw rate-lateral longitudinal/acceleration sensor(3) Steering angle sensor 5P connector SH-AWD control unit Connector A (20P) AcuraLink control unit(4) Connector B(14P) (1) With navigation system (2) Without SH-AWD (3) With SH-AWD (4) With AcuraLink 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), or press the engine start/stop button to select the OFF mode
- Disconnect all the control units connectors in the following tableCONTROL UNIT CONNECTOR REFERENCE
Control Unit Connector Gauge control module 32P connector PCM Connector A (49P) VSA modulator-control unit 47P connector SRS unit Connector A (39P) Audio-navigation unit(1) Connector H (28P) TPMS control unit 20P connector EPS control unit 28P connector Yaw rate-lateral acceleration sensor(2) 4P connector Yaw rate-lateral longitudinal/acceleration sensor(3) Steering angle sensor(3) 5P connector SH-AWD control unit(3) Connector A (20P) AcuraLink control unit(4) Connector B(14P) (1) With navigation system (2) Without SH-AWD (3) With SH-AWD (4) With Acura Link - Disconnect the HDS from the data link connector
- Check for continuity between body ground and gauge control module 32P connector terminals No 9 and No 10 individuallyFig 1: Checking Continuity Between Body Ground And Gauge Control Module 32P Connector Terminals No 9 And No 10
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Repair short to ground in the wire
NO -Go to step 11
- Check for continuity between gauge control module 32P connector terminals No 9 and No 10
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Repair short in the F-CAN wires
NO -Replace the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT )