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
Go to step 2.
NO
Intermittent failure, the system is OK at this time. Check for loose or poor connections.?
2.
B-CAN related units check:
B-CAN related units check
?1.
Turn the vehicle to the OFF (LOCK) mode.
?2.
Disconnect the appropriate connector at each control unit in the table one at a time. Clear the DTC, then recheck for DTCs after each unit is disconnected.
Control Unit
Connector
Gauge control module
Connector A (32P)
Climate control unit
Connector A (32P)
Immobilizer-keyless control unit
7P connector
Power window master switch
37P connector
Automatic lighting control unit-sensor
5P connector
Audio unit
Connector A (24P)
Audio-navigation unit
Connector A (24P)
Front seat heater control unit
24P connector
Power seat control unit
Connector A (20P)
Power tailgate control unit
Connector A (24P)
Relay control module
Connector A (6P)
BSI radar unit
6P connector
DTC Description
DTC
U1280 B-CAN communication bus line error (BUS-OFF)
Is DTC U1280 indicated with each individual unit disconnected?
YES
Leave the connectors disconnected, and go to step 3.
NO
Replace the control unit that was disconnected when DTC U1280 did not reset.?
3.
Shorted wire check (B-CAN lines):
Shorted wire check (B-CAN lines)
?1.
Turn the vehicle to the OFF (LOCK) mode.
?2.
Disconnect the following connector.
Body control module connector B (36P)
?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode Body control module connector B (36P): disconnected