DTC Troubleshooting: U1280 (D-A1), U1280 (80)
DTC U1280 or DTC screen D-A1 or DTC indicator 80: Communication Bus Line Error (BUS-OFF)
DTC Description
DTC
U1280 Communication bus line error (BUS-OFF)
  

1.
Problem verification:

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


?2.
Turn the vehicle to the OFF (LOCK) mode and then the ON mode.

?3.
Do the Self-Diagnostic Function with the climate control unit.

?4.
Wait for at least 6 seconds.

?5.
Check for DTCs.
DTC Description
DTC
U1280 Communication bus line error (BUS-OFF)
  

Is DTC U1280 or Error on the DTC screen D-A1 (climate control panel without display) or 80 (climate control panel with display) indicated?

     
YES
     
     
     
     
NO
     
     
     
Intermittent failure, the system is OK at this time.?