DTC Troubleshooting: U0100, U0114, U0122, U0128, U0131, U0151(Gauge Control Module without CAN Gateway) (2019 2020 2021)

DTC U0100  : Gauge Control Module Lost Communication with ECM/PCM DTC U0114  : Gauge Control Module Lost Communication with All Wheel Drive Control Module DTC U0122  : Gauge Control Module Lost Communication with VSA Modulator-Control Unit (VSA message)DTC U0128  : Gauge Control Module Lost Communication with EPB DTC U0131  : Gauge Control Module Lost Communication with EPS Unit DTC U0151  : Gauge Control Module Lost Communication with SRS Unit (SRS message)

NOTE: 

• Refer to the DTC code shown on the display, and then inspect the connectors and terminals based on the instructions in the chart below.
• The DTC may be stored due to the grounding failure or the power source failure at the transmitting control unit (the grounding inspection and the power source inspection on each control unit are required prior to this checking process).
• 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 .

DTC (Gauge Control Module)

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
   U0100 Gauge Control Module Lost Communication with ECM/PCM
   U0114 Gauge Control Module Lost Communication with All Wheel Drive Control Module
   U0122 Gauge Control Module Lost Communication with VSA Modulator-Control Unit (VSA message)
   U0128 Gauge Control Module Lost Communication with EPB
   U0131 Gauge Control Module Lost Communication with EPS Unit
   U0151 Gauge Control Module Lost Communication with SRS Unit (SRS message)

   Is any of DTC indicated?

   YES 

   Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the transmitting control units, and PCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the Freeze data/on-board snapshot.

2. Open wire check (F-CAN_L, F-CAN_H lines)

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

   -2. Jump the SCS line with the HDS.

   SCS short

   -3. Disconnect the receiving control unit connector.

   Gauge control module 32P connector

   -4. Disconnect the transmitting control unit connectors.(Refer to the DTC code shown on the display, and then disconnect the connector(s) based on the instructions in the chart below.)

   PCM connector A (51P)AWD control unit 24P connectorVSA modulator-control unit 21P connectorElectric parking brake control unit 30P connectorEPS control unit connector B (6P)SRS unit connector A (39P)

   -5. Check for continuity between the receiving control unit and the transmitting control unit on the F-CAN_H circuit and the F-CAN_L circuit as specified in the chart while in the vehicle OFF mode.

   DTC	CIRCUIT NAME	RECEIVING CONTROL UNIT	TRANSMITTING CONTROL UNIT
   U0100 Gauge Control Module Lost Communication with ECM/PCM	F-CAN_H	Gauge control module 32P connector No. 21	PCM connector A (51P) No. 3
   	F-CAN_L	Gauge control module 32P connector No. 22	PCM connector A (51P) No. 4
   U0114 Gauge Control Module Lost Communication with All Wheel Drive Control Module	F-CAN_H	Gauge control module 32P connector No. 21	AWD control unit 24P connector No. 14
   	F-CAN_L	Gauge control module 32P connector No. 22	AWD control unit 24P connector No. 24
   U0122 Gauge Control Module Lost Communication with VSA Modulator-Control Unit (VSA message)	F-CAN_H	Gauge control module 32P connector No. 21	VSA modulator-control unit 21P connector No. 8
   	F-CAN_L	Gauge control module 32P connector No. 22	VSA modulator-control unit 21P connector No. 15
   U0128 Gauge Control Module Lost Communication with EPB	F-CAN_H	Gauge control module 32P connector No. 21	Electric parking brake control unit 30P connector No. 30
   	F-CAN_L	Gauge control module 32P connector No. 22	Electric parking brake control unit 30P connector No. 29
   U0131 Gauge Control Module Lost Communication with EPS Unit	F-CAN_H	Gauge control module 32P connector No. 21	EPS control unit connector B (6P) No. 4
   	F-CAN_L	Gauge control module 32P connector No. 22	EPS control unit connector B (6P) No. 3
   U0151 Gauge Control Module Lost Communication with SRS Unit (SRS message)	F-CAN_H	Gauge control module 32P connector No. 21	SRS unit connector A (39P) No. 34 *1/*2
   			SRS unit connector A (39P) No. 20 *3
   	F-CAN_L	Gauge control module 32P connector No. 22	SRS unit connector A (39P) No. 35 *1/*2
   			SRS unit connector A (39P) No. 21 *3

   *1: USA models*2: Canada models*3: Mexico models

   Is there continuity?

   YES 

   The F-CAN_L and F-CAN_H wires are OK at this time, replace the transmitting control unit.(Refer to the DTC code shown on the display, and then replace the control unit based on the instructions in the chart below.)

   DTC	TRANSMITTING CONTROL UNIT
   U0100 Gauge Control Module Lost Communication with ECM/PCM	PCM
   U0114 Gauge Control Module Lost Communication with All Wheel Drive Control Module	AWD control unit
   U0122 Gauge Control Module Lost Communication with VSA Modulator-Control Unit (VSA message)	VSA modulator-control unit
   U0128 Gauge Control Module Lost Communication with EPB	Electric parking brake control unit
   U0131 Gauge Control Module Lost Communication with EPS Unit	EPS control unit

   DTC	TRANSMITTING CONTROL UNIT
   U0151 Gauge Control Module Lost Communication with SRS Unit (SRS message)	SRS unit

   NO 

   Repair an open in the F-CAN_L and/or F-CAN_H wires between the receiving control unit and the transmitting control unit.