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

INSPECTION PROCEDURE

Note


  • When checking for DTCs, make sure that the blind spot monitor main switch (warning canceling switch assembly) is on.

  • When replacing the main body ECU (multiplex network body ECU), refer to 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.

        OK
        The part number is correct.

    NG

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

    OK

  2. CHECK 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 DTC is output A
      DTC is output from the blind spot monitor sensor LH (Master) B
      DTC is output from the blind spot monitor sensor RH (Slave) C

    B

    REPLACE BLIND SPOT MONITOR SENSOR LH Click here

    C

    REPLACE BLIND SPOT MONITOR SENSOR RH Click here

    A

    USE SIMULATION METHOD TO CHECK Click here