DTC: U1281, U1286, U128D, U128E (2019 2020 2021)

DTC U1281  : Wireless Charger Unit Lost Communication with MICU

DTC U1286  : Wireless Charger Unit Lost Communication with Keyless Access Control Unit

DTC U128D  : Wireless Charger Unit Lost Communication with Gauge Control Module

DTC U128E  : Wireless Charger Unit Lost Communication with Audio-Navigation Unit

NOTE: 

• If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A - Refer to:

  Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks .

• According to the detected DTC(s), check for the power circuit and the ground circuit of the control unit which cannot communicate with the wireless charger.
• Refer to the DTC shown on the display, then inspect the connectors and terminals based on the instructions.

DTC (Wireless Charger)

1. Problem verification

   -1. Clear the DTC 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
   U1281 Wireless Charger Unit Lost Communication with MICU
   U1286 Wireless Charger Unit Lost Communication with Keyless Access Control Unit
   U128D Wireless Charger Unit Lost Communication with Gauge Control Module
   U128E Wireless Charger Unit Lost Communication with Audio-Navigation Unit

   Are any DTCs indicated?

   YES 

   Go to step 2.

   NO 

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

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.

   Wireless charger 7P connector

   - 3. Disconnect the transmitting control unit connector(s).

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

   DTC	Connector
   U1281	Under-dash fuse/relay box connector M (12P)
   U1286	Keyless access/TPMS control unit connector C (20P)
   U128DU128E	Gauge control module connector A (32P)

   - 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 Wireless charger 7P connector: disconnected Transmitting control unit connector(s) for indicated DTCs: disconnected

   DTC	Circuit name	Receiving control unit		Transmitting control unit
   		Connector	Terminal	Connector	Terminal
   U1281	B-CAN_H	Wireless charger 7P connector	No. 3	Under-dash fuse/relay box connector M (12P)	No. 7
   	B-CAN_L		No. 2		No. 1
   U1286	B-CAN_H	Wireless Charger 7P Connector	No. 3	Keyless access/TPMS control unit connector C (20P) - Refer to: Keyless Access/TPMS Control Unit Connector for Inputs and Outputs (2019 2020 2021)	No. 1
   	B-CAN_L		No. 2		No. 11
   U128DU128E	B-CAN_H	Wireless Charger 7P Connector	No. 3	Gauge Control Module Connector A (32P)	No. 30
   	B-CAN_L		No. 2		No. 31

   Is there continuity?

   YES 

   The B-CAN_H wire and the B-CAN_L wire are OK, According to the detected DTC on the following table replace the correspond control unit.

   DTC	Operation for transmitting control unit
   U1281	Under-dash fuse/relay box
   U1286	Keyless access/TPMS control unit
   U128DU128E	Gauge control module

   NO 

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