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Home >> Acura >> 2012 >> MDX >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Multiplex Integrated Control System >> DTC Troubleshooting >> DTC U1280: Communication Bus Line Error (BUS-OFF)

DTC U1280: 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 
  1. Clear the DTCs with the HDS.
  2. Turn the ignition switch to LOCK (0) and then back ON (M).
  3. Wait for more than 6 seconds.
  4. 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
  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.