Acuralink Control Unit

DTC Troubleshooting: U0155 (AcuraLink Control Unit), U128D

DTC U0155: Gauge Control Module Lost F-CAN Communication with AcuraLink Control Unit (XM Receiver)

DTC U128D: AcuraLink Control Unit (XM Receiver) Lost B-CAN Communication with Gauge Control Module

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN system diagnosis test mode A. Troubleshooting - B-CAN System Diagnosis Test Mode A

1. Connect the HDS to the DLC. How to Troubleshoot the Acura Link

2. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

3. Check for DTCs with the HDS and DTC log data in the navigation system diagnostic mode. How to Enter the Self-Diagnostic Function

Is DTC U0155 or U128D indicated with HDS and on the navigation display?
YES - Go to step 4.

NO - Intermittent failure, the F-CAN communication line is OK at this time. Check for poor connections or loose terminals at the AcuraLink control unit (XM receiver).


4. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

5. Disconnect AcuraLink control unit (XM receiver) connector A (32P) and the gauge control module 32P connector.

6. Check for continuity between AcuraLink control unit (XM receiver) connector A (32P) terminals No. 6 and No. 7 and gauge control module 32P connector terminals No. 9 and No. 10 individually.

Is there continuity?
YES - Check for poor connections or loose terminals at the AcuraLink control unit (XM receiver). If all connections are OK, update the AcuraLink control unit Programming and Relearning if it does not have the latest software, then recheck. If the software is the latest, replace the AcuraLink control unit (XM receiver). Acura Link Control Unit (XM Receiver) Removal/Installation

NO - Repair open in the wire between AcuraLink control unit (XM receiver) and gauge control module.