BLIND SPOT MONITOR SYSTEM, Diagnostic DTC:U1331

DTC Code DTC Name
U1331 Software Incompatibility with Body Control Module "B"

DESCRIPTION

This DTC is stored when the destination information of the main body ECU (multiplex network body ECU) does not match that of the blind spot monitor sensors.

DTC No. DTC Detection Condition Trouble Area
U1331 Destination information of the main body ECU (multiplex network body ECU) and blind spot monitor sensor do not match.

  • Main body ECU (multiplex network body ECU)

  • Blind spot monitor sensor LH

  • Blind spot monitor sensor RH

CAUTION / NOTICE / HINT

Note


  • When checking for DTCs, make sure that the blind spot monitor main switch (steering pad switch assembly [multi-function switch]) is on.

  • When replacing the main body ECU (multiplex network body ECU), perform the Service Bulletin.

PROCEDURE


  1. CONFIRM PART NUMBER (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU])


    1. Check the main body ECU (multiplex network body ECU) part number.


      1. Check if the part number of the main body ECU (multiplex network body ECU) installed on the vehicle is correct.

        Result
        Result Proceed to
        The part number is correct. A
        The part number is incorrect (for LHD). B
        The part number is incorrect (for RHD). C

    B

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    C

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    A

  2. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Recheck for DTCs and check if the same DTC is output again.

      Result
      Result Proceed to
      No DTCs are output. A
      DTC U1331 is output ("Blind Spot Monitor Master"). B
      DTC U1331 is output ("Blind Spot Monitor Slave"). C

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE BLIND SPOT MONITOR SENSOR LH Click here

    C

    REPLACE BLIND SPOT MONITOR SENSOR RH Click here