DTC U1281, U1286, U128D, U128E (Wireless Charger)

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 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 (Wireless Charger)

1. Problem verification

   -1. Clear the DTC 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
   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 or loose terminals.

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	Body control module connector B (36P)
   U1286	Body control module connector B (36P)
   U128D	Gauge control module connector A (32P)
   U128E	Audio unit connector A (24P) (display audio type without navigation) Audio-navigation unit connector A (24P) (with navigation)

   -4. Measure the resistance 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) modeWireless 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	Body control module connector B (36P)	No. 20
   	B-CAN_L		No. 2		No. 21
   U1286	B-CAN_H	Wireless charger 7P connector	No. 3	Body control module connector B (36P)	No. 20
   	B-CAN_L		No. 2		No. 21
   U128D	B-CAN_H	Wireless charger 7P connector	No. 3	Gauge control module connector A (32P)	No. 30
   	B-CAN_L		No. 2		No. 31

   DTC	Circuit name	Receiving control unit		Transmitting control unit
   		Connector	Terminal	Connector	Terminal
   U128E	B-CAN_H	Wireless charger 7P connector	No. 3	Audio unit connector A (24P) (display audio type without navigation) Audio-navigation unit connector A (24P) (with navigation)	No. 14
   	B-CAN_L		No. 2		No. 24

   Is there 1.0 Ω or less?

   YES 

   The B-CAN_H wire and the B-CAN_L wire are OK. Refer to the DTC shown on the display, then replace the control unit based on the instructions (see table).

   DTC	Operation for transmitting control unit
   U1281	Body control module
   U1286	Body control module
   U128D	Gauge control module
   U128E	Audio unit (display audio type without navigation) Audio-navigation unit (with navigation)

   NO 

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