DTC U0230, U1281, U1288, U128F (Gauge Control Module) (2018 2019 2020 2021 2022 2023 2024)

DTC U0230  : Gauge Control Module Lost Communication with PTG DTC U1281  : Gauge Control Module Lost Communication with MICU (Body Control Module) (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 .
• 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. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   -3. Turn the vehicle to the OFF (LOCK) mode and then the ON mode.

   -4. Wait for at least 6 seconds.

   -5. 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 (Body Control Module) (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 poor connections or loose terminals at the transmitting control units and the gauge control module.

2. Open wire check (B-CAN H line, 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. According to the detected DTC on the following table, disconnect the transmitting control unit connector (s).

   DTC	Connector
   U0230	Power tailgate control unit connector A (24P)
   U1281	Body control module connector B (36P)
   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.

   Test condition

   Vehicle OFF (LOCK) mode Gauge control module connector A (32P): disconnected Transmitting control unit connector (s) for indicated DTCs: disconnected

   DTC	Circuit name	Receiving control unit		Transmitting control unit
   		Connector	Terminal	Connector	Terminal
   U0230	B-CAN H	Gauge control module connector A (32P)	No. 30	Power tailgate control unit connector A (24P)	No. 6
   	B-CAN L		No. 31		No. 7
   U1281	B-CAN H	Gauge control module connector A (32P)	No. 30	Body control module connector B (36P)	No. 20
   	B-CAN L		No. 31		No. 21
   U1288	B-CAN H	Gauge control module connector A (32P)	No. 30	Parking and back-up sensor control unit 16P connector	No. 9
   	B-CAN L		No. 31		No. 2
   U128F	B-CAN H	Gauge control module connector A (32P)	No. 30	Left side BSI radar unit 6P connector	No. 3
   	B-CAN L		No. 31		No. 5

   Is there continuity?

   YES 

   The B-CAN H wire and the B-CAN L wire are OK. Refer to the DTC shown on the display, then substitute or replace the control unit based on the instructions (see table).

   DTC	Operation for transmitting control unit
   U0230	Substitute a known-good power tailgate control unit , then recheck. If DTC U0230 goes away after substitution, replace the original power tailgate control unit .
   U1281	Substitute a known-good body control module , then recheck. If DTC U1281 goes away after substitution, replace the original body control module .
   U1288	Substitute a known-good parking and back-up sensor control unit , then recheck. If DTC U1288 goes away after substitution, replace the original parking and back-up sensor control unit .
   U128F	Substitute a known-good left side BSI radar unit , then recheck. If DTC U128F goes away after substitution, replace the original left side BSI radar unit .

   NO 

   Repair an open in the B-CAN H wire and/or the B-CAN L wire between the gauge control module and the transmitting control unit.