DTC Troubleshooting: U128E
DTC U128E: Wireless Charger Unit Lost Communication With Audio-Navigation Unit
DTC Description
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.

1.
Problem verification:

Problem verification
?1.
Clear the DTCs with the HDS.


?2.
Press the engine start/stop button to select the OFF mode and then the ON mode.

?3.
Wait for at least 6 seconds.

?4.
Check for DTCs with the HDS.
DTC Description
DTC
U128E Wireless charger unit lost communication with Audio-Navigation Unit
  

Is DTC U128E indicated?

     
YES
     
     
     
Go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Check for loose or poor connections.?
2.
Audio-navigation unit check:

Audio-navigation unit check
?1.
Check the function of the audio-navigation unit.

Does the audio-navigation unit function properly?

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
3.
Open wire check (B-CAN_H lines):

Open wire check (B-CAN_H lines)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following connector.

?3.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
Wireless charger 7P connector: disconnected
Audio-navigation unit connector B (20P): disconnected
Test circuit
B-CAN_H
Test point 1
Wireless charger 7P connector No. 3 (PNK)
Test point 2
Audio-navigation unit connector B (20P) No. 13 (PNK)


Is there continuity?

     
YES
     
     
     
The B-CAN_H wire is OK. Go to step 4
     
NO
     
     
     
An open or poor connection in the B-CAN_H wire between the wireless charger and the keyless access control unit.?
4.
Open wire check (B-CAN_L lines):

Open wire check (B-CAN_L lines)
?1.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
Wireless charger 7P connector: disconnected
Audio-navigation unit connector B (20P): disconnected
Test circuit
B-CAN_L
Test point 1
Wireless charger 7P connector No. 2 (BLU)
Test point 2
Audio-navigation unit connector B (20P) No. 3 (BLU)


Is there continuity?

     
YES
     
     
     
The B-CAN_L wire is OK. Replace the audio-navigation unit.?
     
NO
     
     
     
An open or poor connection in the B-CAN_L wire between the wireless charger and the audio-navigation unit.?