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 (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A )

Connect the HDS to the DLC (see GENERAL TROUBLESHOOTING INFORMATION )
Turn the ignition switch to ON (II)
Check for DTCs with the HDS and DTC log data in the navigation system diagnostic mode (see SYSTEM DIAGNOSTIC MODE )
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)
Turn the ignition switch to LOCK (0)
Disconnect AcuraLink control unit (XM receiver) connector A (32P) and the gauge control module 32P connector
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 21 and No 22 individually

Fig 1: Checking Continuity Between Acuralink Control Unit Connector A (32P) Terminals And Gauge Control Module 32P Connector Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.

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 if it does not have the latest software, then recheck If the software is the latest, replace the AcuraLink control unit (see STEREO AMPLIFIER REMOVAL/INSTALLATION )

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