DTC U1280: Communication Bus Line Error (BUS-OFF)

WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A

Clear the DTCs with the HDS.
Turn the ignition switch to LOCK (0) and then back ON (M).
Wait for more than 6 seconds.

Check for DTCs with the HDS.

Is DTC U1280 indicated?

YES -Go to step 5.

NO -Intermittent failure, the system is OK at this time. Check for loose or poor connections at the MICU and B-CAN connected units in the table.

Under-dash fuse/relay box connector	B-CAN connected unit connector
Connector N (45P) terminal No. 28	HandsFreeLink control unit 28P connector terminal No. 18
Connector G (6P) terminal No. 1	AcuraLink control unit (XM receiver) connector A (32P) terminal No. 10
Connector G (6P) terminal No. 1	BSI control unit 16P connector terminal No. 5

Check for DTCs with the HDS.
Is DTC B1000 also indicated?

YES -Troubleshoot DTC B1000.

NO -Intermittent failure, the system is OK at this time. Check for loose or poor connections at the MICU and B-CAN connected units in the table.