DTC U0155: Lost Communication With Gauge Control Module (VSP/NE Frame)

WARNING: This page is about a different variant/trim than selected.

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 ).

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 U0155 indicated?

YES -Go to step 5.

NO -Intermittent failure, the system is OK at this time. Check for loose or poor connections between the power seat control unit and the gauge control module. ■
From the BODY ELECTRICAL SYSTEM SELECT menu, select B-CAN CONTROL UNITS INFORMATION, and then select CHECK CONNECTED CONTROL UNITS.
Is the gauge control module detected?

YES -Go to step 10

NO -Go to step 6.
Measure the voltage between body ground and gauge control module 32P connector terminals No. 16 and No. 32 individually.

Fig 1: Body Ground And Gauge Control Module 32P Connector Terminals No. 16 And No. 32
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is the gauge control module detected?

YES -Go to step 9

NO -Go to step 7.
Turn the ignition switch to LOCK (0)
Check the No. 15 (10 A) fuse in the under-hood fuse/relay box and the No. 5 (7.5 A) fuse in the driver's under-dash fuse relay box.
Are the fuses OK?

YES -Repair an open or high resistance in the No. 15 (10A) and/or No. 5 (7.5 A) fuse circuit.

NO -Replace the fuses. If the fuse blows again, repair a short to ground on the No. 15 (10 A) and/or No. 5 (7.5 A) fuse circuit.
Measure the voltage between body ground and gauge control module 32P connector terminals No. 13 and No. 17 individually.

Fig 2: Body Ground And Gauge Control Module 32P Connector Terminals No. 13 And No. 17
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there less than 0.2V?

YES -Go to step 10

NO -Repair an open or high resistance in the ground wires or poor ground (G501) and /or (G502).
Turn the ignition switch to LOCK (0).
Disconnect power seat control unit connector B (40P).
Disconnect the gauge control module 32P connector.
Check for continuity between power seat control unit connector B (40P) terminals No. 39 and No. 40 and gauge control module 32P connector terminals No. 18 and No. 19 respectively.

Fig 3: Checking Continuity Between Power Seat Control Unit Connector B (40P) Terminals No. 39, 40 And Gauge Control Module 32P Connector Terminals No. 18, 19
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Replace the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ). ■

NO -An open or poor connection in the wire between the gauge control module and the power seat control unit. ■