DTC Troubleshooting: U1280
DTC U1280: B-CAN Communication Bus Line Error (BUS-OFF)
NOTE:
If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.
The front seat heater control unit does not turn on the front seat heater until the seat core temperature is 185 °F (85 °C) or less. Make sure the seat core temperature is below 185 °F (85 °C) before troubleshooting.

DTC Description
DTC
U1280 B-CAN 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.
Wait for at least 6 seconds.

?4.
Check for DTCs with the HDS.
DTC Description
DTC
U1280 B-CAN Communication Bus Line Error (BUS-OFF)
  

Is DTC U1280 indicated?

     
YES
     
     
     
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Check for loose or poor connections.?