DTC U0155: F-CAN Malfunction (PCM-Gauge Control Module)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2015 Honda Crosstour, 2014 Honda Crosstour, 2013 Honda Crosstour, 2012 Honda Crosstour, and 2011 Honda Accord Crosstour. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Turn the ignition switch to ON (II).
Clear the DTC with the HDS.
Check for Pending or Confirmed DTCs with the HDS.
Is DTC U0155 indicated?

YES -Go to next step.

NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the gauge control module and the PCM.
Check for body electrical DTCs in the DTCs MENU with the HDS.
Is DTC U0029 and/or U0100 indicated?

YES -Go to next step.

NO -Do the gauge control module input test (see GAUGE CONTROL MODULE INPUT TEST ).
Turn the ignition switch to LOCK (0).
Jump the SCS line with the HDS.
Remove the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ).
Disconnect the gauge control module 32P connector.
Disconnect PCM connector A (49P).
Check for continuity between PCM connector terminal A48 and gauge control module 32P connector terminal No. 19.

Fig 1: Checking Continuity Between PCM A48 And Gauge Control Module 32P Connector Terminal Location
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to next step.

NO -Repair an open in the wire between the PCM (A48) and the gauge control module, then go to step 12.
Check for continuity between PCM connector terminal A49 and gauge control module 32P connector terminal No. 20.

Fig 2: Identifying PCM A49 And Gauge Control Module 32P Connector Terminal Location
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Substitute a known-good gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ), then go to step 12 and recheck. If DTC U0155 is not indicated after substitution, replace the original gauge control module, then go to step 12.

NO -Repair an open in the wire between the PCM (A49) and the gauge control module, then go to step 12.
Reconnect all connectors.
Turn the ignition switch to ON (II).
Reset the PCM with the HDS.
Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).
Check for Pending or Confirmed DTCs with the HDS.
Is DTC U0155 indicated?

YES -Check for poor connections or loose terminals at the gauge control module and the PCM, then go to step 1.

NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.