DTC: U0100(Gauge Control Module) (2013 2014 2015 2016)

DTC U0100  : Gauge Control Module Lost Communication With PCM

DTC (Gauge Control Module)

NOTE: 

• If you have any loss of communication DTCs for the PCM, troubleshoot those DTCs first.
• 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. Press the engine start/stop button to select the OFF mode and then the ON mode.

   -3. Wait for at least 6 seconds.

   -4. Check for DTCs with the HDS.

   DTC Description	DTC
   U0100 Gauge Control Module Lost Communication With PCM

   Is DTC U0100 indicated?

   YES 

   Go to step 2.

   NO 

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

2. Open wire check (F CAN lines)

   -1. Press the engine start/stop button to select the OFF mode.

   -2. Jump the SCS line with the HDS.

   SCS short

   -3. Disconnect the following connectors.

   PCM connector A (49P)

   Gauge control module 32P connector

   -4. Check for continuity between test points 1 and 2 respectively.

   Test condition	OFF modePCM connector A (49P): disconnectedGauge control module 32P connector: disconnected
   Test circuit	F CAN-H
   Test point 1	Gauge control module 32P connector No. 23 (WHT)
   Test point 2	PCM connector A (49P) No. 3 (WHT)

   Test circuit	F CAN-L
   Test point 1	Gauge control module 32P connector No. 24 (RED)
   Test point 2	PCM connector A (49P) No. 4 (RED)

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

   Is there continuity?

   YES 

   The F CAN wires are OK. Replace the gauge control module .

   NO 

   An open or poor connection in the F CAN wires between the PCM and the gauge control module.