DTC U1281, U1286, U128D, U128E

DTC U1281  : Wireless Charger Unit Lost Communication with MICU (Body Control Module)DTC U1286  : Wireless Charger Unit Lost Communication with Keyless Access Control Unit (Body Control Module)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 .
• 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.

   -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 (body control module)
   U1286 Wireless charger unit lost communication with keyless access control unit (body control module)
   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. According to the detected DTC on the following table, disconnect the transmitting control unit connector (s).

   DTC	Connector
   U1281U1286	Body control module connector A (66P)
   U128D	Gauge control module connector A (32P)
   U128E *1	Audio unit connector A (24P)
   U128E *2	Audio-navigation unit connector A (24P)

   *1: Without navigation

   *2: With navigation

   -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
   U1281U1286	B-CAN_H	Wireless charger 7P connector	No. 3	Body control module connector A (66P)	No. 54
   	B-CAN_L		No. 2		No. 55
   U128D	B-CAN_H	Wireless charger 7P connector	No. 3	Gauge control module connector A (32P)	No. 22
   	B-CAN_L		No. 2		No. 23
   U128E *1	B-CAN_H	Wireless charger 7P connector	No. 3	Audio unit connector A (24P)	No. 14
   	B-CAN_L		No. 2		No. 24
   U128E *2	B-CAN_H	Wireless charger 7P connector	No. 3	Audio-navigation unit connector A (24P)	No. 14
   	B-CAN_L		No. 2		No. 24

   *1: Without navigation

   *2: With navigation

   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, substitute or replace the control unit based on the instructions (see table).

   DTC	Operation for transmitting control unit
   U1281U1286	Substitute a known-good body control module , then recheck. If DTC U1281/U1286 goes away after substitution, replace the original body control module .
   U128D	Substitute a known-good gauge control module , then recheck. If DTC U128D goes away after substitution, replace the original gauge control module .
   U128E *1	Substitute a known-good audio unit , then recheck. If DTC U128E goes away after substitution, replace the original audio unit .
   U128E *2	Substitute a known-good audio-navigation unit , then recheck. If DTC U128E goes away after substitution, replace the original audio-navigation unit .

   *1: Without navigation

   *2: With navigation

   NO 

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