DTC : U0230, U1281, U1288, U128F (Gauge Control Module) (2019 2020 2021)

DTC U0230  : Gauge Control Module Lost Communication with PTG

DTC U1281  : Gauge Control Module Lost Communication with MICU (MICU frame)

DTC U1288  : Gauge Control Module Lost Communication with PARKSR

DTC U128F  : Gauge Control Module Lost Communication with BSI Unit

NOTE: 

• If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks .
• Refer to the DTC code shown on the display, and then inspect the connectors and terminals based on the instructions in the table 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).

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
   U0230 Gauge Control Module Lost Communication with PTG
   U1281 Gauge Control Module Lost Communication with MICU (MICU frame)
   U1288 Gauge Control Module Lost Communication with PARKSR
   U128F Gauge Control Module Lost Communication with BSI 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 (B-CAN_H, B-CAN_L line)

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

   - 2. Disconnect the receiving control unit connector.

   Gauge control module connector A (32P)

   - 3. Disconnect the transmitting control unit connectors.

   Refer to the DTC shown on the display, then disconnect the connector(s) based on the instructions (see table).

   DTC	Connector
   U0230	Power tailgate control unit connector A (24P)
   U1281	Under-dash fuse/relay box connector M (12P)
   U1288	Parking and back-up sensor control unit 16P connector
   U128F	Left side BSI radar unit 6P connector

   - 4. Check for continuity between the receiving control unit and the transmitting control unit on the B-CAN_H circuit and the B-CAN_L circuit as specified in the table while in the vehicle OFF (LOCK) mode.

   DTC	CIRCUIT NAME	RECEIVING CONTROL UNIT	TRANSMITTING CONTROL UNIT
   U0230	B-CAN_H	Gauge control module connector A (32P) No. 30 - Refer to:  Gauge Control Module Connector for Inputs and Outputs (2016 2017 218) Gauge Control Module Connector for Inputs and Outputs (2019) or Gauge Control Module Connector for Inputs and Outputs (2020 2021) .	Power tailgate control unit connector A (24P) No. 6 - Refer to:  Power Tailgate Control Unit Connector for Inputs and Outputs (2019 2020 2021)
   	B-CAN_L	Gauge control module connector A (32P) No. 31 - Refer to:  Gauge Control Module Connector for Inputs and Outputs (2019) or Gauge Control Module Connector for Inputs and Outputs (2020 2021) .	Power tailgate control unit connector A (24P) No. 7 - Refer to:  Power Tailgate Control Unit Connector for Inputs and Outputs (2019 2020 2021)
   U1281	B-CAN_H	Gauge control module connector A (32P) No. 30 - Refer to:  Gauge Control Module Connector for Inputs and Outputs (2019) or Gauge Control Module Connector for Inputs and Outputs (2020 2021) .	Under-dash fuse/relay box connector M (12P) No. 7
   	B-CAN_L	Gauge control module connector A (32P) No. 31 - Refer to:  Gauge Control Module Connector for Inputs and Outputs (2019) or Gauge Control Module Connector for Inputs and Outputs (2020 2021) .	Under-dash fuse/relay box connector M (12P) No. 1
   U1288	B-CAN_H	Gauge control module connector A (32P) No. 30 - Refer to:  Gauge Control Module Connector for Inputs and Outputs (2019) or Gauge Control Module Connector for Inputs and Outputs (2020 2021) .	Parking and back-up sensor control unit 16P connector No. 9 - Refer to:  Parking and Back-Up Sensor Control Unit Connector for Inputs and Outputs (2019 2020 2021)
   	B-CAN_L	Gauge control module connector A (32P) No. 31 - Refer to:  Gauge Control Module Connector for Inputs and Outputs (2019) or Gauge Control Module Connector for Inputs and Outputs (2020 2021) .	Parking and back-up sensor control unit 16P connector No. 2 - Refer to:  Parking and Back-Up Sensor Control Unit Connector for Inputs and Outputs (2019 2020 2021)
   U128F	B-CAN_H	Gauge control module connector A (32P) No. 30 - Refer to:  Gauge Control Module Connector for Inputs and Outputs (2019) or Gauge Control Module Connector for Inputs and Outputs (2020 2021) .	Left side BSI radar unit 6P connector No. 3
   	B-CAN_L	Gauge control module connector A (32P) No. 31 - Refer to:  Gauge Control Module Connector for Inputs and Outputs (2019) or Gauge Control Module Connector for Inputs and Outputs (2020 2021) .	Left side BSI radar unit 6P connector No. 5

   Is there continuity?

   YES 

   The B-CAN_L to B-CAN_H wire is OK.

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

   DTC	Operation for Transmitting Control Unit
   U0230	Power Tailgate Control Unit
   U1281	Under-dash Fuse/Relay Box
   U1288	Parking and Back-Up Sensor Control Unit
   U128F	Left Side BSI Radar Unit

   NO 

   Repair an open or high resistance in the B-CAN_H and/or B-CAN_L wire.