DTC : U0100, U0101, U0122, U0127, U0131, U0151 (Gauge Control Module: 9-Speed A/T Without CAN Gateway) (2019 2020 2021)

DTC U0100  : Gauge Control Module Lost Communication with ENG/AT

DTC U0101  : Gauge Control Module Lost Communication With AT

DTC U0122  : Gauge Control Module Lost Communication with VSA Modulator-Control Unit

DTC U0127  : Gauge Control Module Lost Communication with TPMS Control Unit

DTC U0131  : Gauge Control Module Lost Communication with EPS Unit

DTC U0151  : Gauge Control Module Lost Communication with SRS Unit

NOTE: 

• Before you troubleshoot, review the general troubleshooting information. Go to: How to Troubleshoot the Body Electrical .
• According to the detected DTC(s), check for the power circuit and the ground circuit of the control unit which cannot communicate with the gauge control module.
• Refer to the DTC shown on the display, then inspect the connectors and terminals based on the instructions.

DTC (Gauge Control Module)

1. Problem verification

   - 1. Clear the DTCs with the HDS.

   Clear DTCs

   - 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 ENG/AT
   U0101 Gauge Control Module Lost Communication with AT
   U0122 Gauge Control Module Lost Communication with VSA Modulator-Control Unit
   U0127 Gauge Control Module Lost Communication with TPMS Control Unit
   U0131 Gauge Control Module Lost Communication with EPS Unit
   U0151 Gauge Control Module Lost Communication with SRS Unit

   Are any DTCs 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 A_L, F-CAN A_H lines)

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

   - 2. U0100: Jump the SCS line with the HDS, and wait more than 1 minute.

   SCS short

   - 3. Disconnect the receiving control unit connector.

   Gauge control module connector A (32P)

   - 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 table below.)

   PCM connector A (50P)

   TCM 58P connector

   VSA Modulator-Control Unit 38P connector

   Keyless access/TPMS control unit connector C (20P)

   EPS control unit connector B (8P)

   SRS unit connector A (39P)

   - 5. Check for continuity between the receiving control unit and the transmitting control unit on the F-CAN A_H circuit and the F-CAN A_L circuit as specified in the table while in the vehicle OFF (LOCK) mode.

   DTC	CIRCUIT NAME	RECEIVING CONTROL UNIT	TRANSMITTING CONTROL UNIT
   U0100	F-CAN A_H	Gauge control module connector A (32P) No. 19 - Refer to:  Gauge Control Module Connector for Inputs and Outputs (2019) or Gauge Control Module Connector for Inputs and Outputs (2020 2021) .	PCM connector A (50P) No. 11 - Refer to:  PCM Connector for Inputs and Outputs (9-Speed A/T) (2019 2020 2021) .
   	F-CAN A_L	Gauge control module connector A (32P) No. 20 - Refer to:  Gauge Control Module Connector for Inputs and Outputs (2019) or Gauge Control Module Connector for Inputs and Outputs (2020 2021) .	PCM connector A (50P) No. 10 - Refer to:  PCM Connector for Inputs and Outputs (9-Speed A/T) (2019 2020 2021) .
   U0101	F-CAN A_H	Gauge control module connector A (32P) No. 19 - Refer to:  Gauge Control Module Connector for Inputs and Outputs (2019) or Gauge Control Module Connector for Inputs and Outputs (2020 2021) .	TCM 58P connector No. 34 - Refer to:  A/T Control System Connector for Inputs and Outputs (9-Speed A/T) (2019) or A/T Control System Connector for Inputs and Outputs (9-Speed A/T) (2020 2021) .
   	F-CAN A_L	Gauge control module connector A (32P) No. 20 - Refer to:  Gauge Control Module Connector for Inputs and Outputs (2019) or Gauge Control Module Connector for Inputs and Outputs (2020 2021) .	TCM 58P connector No. 47 - Refer to:  A/T Control System Connector for Inputs and Outputs (9-Speed A/T) (2019) or A/T Control System Connector for Inputs and Outputs (9-Speed A/T) (2020 2021) .
   U0122	F-CAN A_H	Gauge control module connector A (32P) No. 19 - Refer to:  Gauge Control Module Connector for Inputs and Outputs (2019) or Gauge Control Module Connector for Inputs and Outputs (2020 2021) .	VSA Modulator-Control Unit 38P connector No. 6 - Refer to:  VSA Modulator-Control Unit Connector for Inputs and Outputs (2019 2020 2021) .
   	F-CAN A_L	Gauge control module connector A (32P) No. 20 - Refer to:  Gauge Control Module Connector for Inputs and Outputs (2019) or Gauge Control Module Connector for Inputs and Outputs (2020 2021) .	VSA Modulator-Control Unit 38P connector No. 7 - Refer to:  VSA Modulator-Control Unit Connector for Inputs and Outputs (2019 2020 2021) .
   U0127	F-CAN A_H	Gauge control module connector A (32P) No. 19 - Refer to:  Gauge Control Module Connector for Inputs and Outputs (2019) or Gauge Control Module Connector for Inputs and Outputs (2020 2021) .	Keyless access/TPMS control unit connector C (20P) No. 2 - Refer to:  Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2019 2020 2021)
   	F-CAN A_L	Gauge control module connector A (32P) No. 20 - Refer to:  Gauge Control Module Connector for Inputs and Outputs (2019) or Gauge Control Module Connector for Inputs and Outputs (2020 2021) .	Keyless access/TPMS control unit connector C (20P) No. 12 - Refer to:  Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2016 2017 2018) Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2019 2020 2021)
   U0131	F-CAN A_H	Gauge control module connector A (32P) No. 19 - Refer to:  Gauge Control Module Connector for Inputs and Outputs (2019) or Gauge Control Module Connector for Inputs and Outputs (2020 2021) .	EPS control unit connector B (8P) No. 3 - Refer to:  EPS Control Unit Connector for Inputs and Outputs (2019 2020 2021) .
   	F-CAN A_L	Gauge control module connector A (32P) No. 20 - Refer to:  Gauge Control Module Connector for Inputs and Outputs (2019) or Gauge Control Module Connector for Inputs and Outputs (2020 2021) .	EPS control unit connector B (8P) No. 8 - Refer to:  EPS Control Unit Connector for Inputs and Outputs (2019 2020 2021) .
   U0151	F-CAN A_H	Gauge control module connector A (32P) No. 19 - Refer to:  Gauge Control Module Connector for Inputs and Outputs (2019) or Gauge Control Module Connector for Inputs and Outputs (2020 2021) .	SRS unit connector A (39P) No. 34 - Refer to:  SRS Unit Connector for Inputs and Outputs (2019 2020 2021) .
   	F-CAN A_L	Gauge control module connector A (32P) No. 20 - Refer to:  Gauge Control Module Connector for Inputs and Outputs (2019) or Gauge Control Module Connector for Inputs and Outputs (2020 2021) .	SRS unit connector A (39P) No. 35 - Refer to:  SRS Unit Connector for Inputs and Outputs (2019 2020 2021) .

   Is there continuity?

   YES 

   The F-CAN A_H wire and the F-CAN A_L wire are OK.

   According to the detected DTC on the following table replace the correspond control unit.

   DTC	Operation for Transmitting Control Unit
   U0100	PCM (9-Speed A/T) (2019 2020 2021)
   U0101	TCM
   U0122	VSA Modulator-Control Unit
   U0127	Keyless access/TPMS control unit
   U0131	EPS control unit
   U0151	SRS (2017 2018 2019 2020 2021)

   NO 

   Repair an open in the F-CAN A_L and/or F-CAN A_H wire.