DTC U0155 (Parking/Back-Up Sensor Control Unit) (2014 2015)

DTC U0155  : Lost Communication With Gauge Control Module

DTC (Parking and Back-Up Sensor Control Unit)

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

1. Problem verification

   -1. Clear the DTCs with the HDS.

   -2. Turn the vehicle to the OFF (LOCK) mode and then the ON mode.

   -3. Wait for at least 6 seconds.

   -4. Check for DTCs with the HDS.

   DTC Description	DTC
   U0155 Lost Communication With Gauge Control Module

   Is DTC U0155 indicated?

   YES 

   Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Check for loose or poor connections.

2. Determine possible failure area (gauge control module power and ground, B CAN line)

   -1. Select B-CAN CONTROL UNITS INFORMATION from the BODY ELECTRICAL SYSTEM SELECT menu, and then select CHECK CONNECTED CONTROL UNITS.

   -2. Check the DETECT/NOT AVAILABLE information of the GAUGE CONTROL MODULE.

   Is DETECT indicated?

   YES 

   Go to step 8.

   NO 

   Go to step 3.

3. Fuse check

   -1. Check the following fuses.

   Fuse	No. C16 (10 A)
   Location	Under-hood fuse/relay box

   Fuse	No. D11 (10 A)
   Location	Driver's under-dash fuse/relay box

   Is each fuse OK?

   YES 

   Go to step 4.

   NO 

   Replace the fuse. If the fuse blows again, repair a short to ground in the No. C16 (10 A) and/or No. D11 (10 A) fuse circuit (s).

4. Open wire check (+B BACK UP line)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Disconnect the following connector.

   Gauge control module connector A (32P)

   -3. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode Gauge control module connector A (32P): disconnected
   Test circuit	+B BACK UP
   Test point 1	Gauge control module connector A (32P) No. 1 (PNK)
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there battery voltage?

   YES 

   The +B BACK UP wire is OK. Go to step 5.

   NO 

   Repair an open or high resistance in the wire.

5. Open wire check (IG1 METER line)

   -1. Turn the vehicle to the ON mode.

   -2. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode Gauge control module connector A (32P): disconnected
   Test circuit	IG1 METER
   Test point 1	Gauge control module connector A (32P) No. 2 (ORN)
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there battery voltage?

   YES 

   The IG1 METER wire is OK. Go to step 6.

   NO 

   Repair an open or high resistance in the wire.

6. Open wire check (GND lines)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Check for continuity between test points 1 and 2 individually.

   Test condition	Vehicle OFF (LOCK) mode Gauge control module connector A (32P): disconnected
   Test circuit	GND
   Test point 1	Gauge control module connector A (32P) No. 16 (BLK)
   Test point 2	Body ground

   Test circuit	GND
   Test point 1	Gauge control module connector A (32P) No. 32 (BLK)
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The GND wires are OK. Go to step 7.

   NO 

   Repair an open or high resistance in the ground wire or poor ground (G501).

7. Open wire check (B CAN lines)

   -1. Disconnect the following connector.

   Parking and back-up sensor control unit 24P connector

   -2. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode Gauge control module connector A (32P): disconnected Parking and back-up sensor control unit 24P connector: disconnected
   Test circuit	B CAN-H
   Test point 1	Parking and back-up sensor control unit 24P connector No. 22 (RED)
   Test point 2	Gauge control module connector A (32P) No. 25 (RED)

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   An open or poor connection in the B CAN-L wire between the parking and back-up sensor control unit and the gauge control module.

   NO 

   An open or poor connection in the B CAN-H wire between the parking and back-up sensor control unit and the gauge control module.

8. Open wire check (B CAN lines)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Disconnect the following connectors.

   Parking and back-up sensor control unit 24P connector

   Gauge control module connector A (32P)

   -3. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode Parking and back-up sensor control unit 24P connector: disconnected Gauge control module connector A (32P): disconnected
   Test circuit	B CAN-H
   Test point 1	Parking and back-up sensor control unit 24P connector No. 22 (RED)
   Test point 2	Gauge control module connector A (32P) No. 25 (RED)

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   An open or poor connection in the B CAN-L wire between the parking and back-up sensor control unit and the gauge control module.

   NO 

   An open or poor connection in the B CAN-H wire between the parking and back-up sensor control unit and the gauge control module.