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 (driver side junction block) does not match that of the blind spot monitor sensors.

DTC Code DTC Detection Condition Trouble Area
U1331 Destination information of the main body ECU (driver side junction block) and blind spot monitor sensor do not match.

  • Main body ECU (driver side junction block)

  • 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 (outer mirror switch assembly) is on.

PROCEDURE


  1. CONFIRM PART NUMBER (MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK))


    1. Check the main body ECU (driver side junction block) part number.


      1. Check if the part number of the main body ECU (driver side junction block) installed on the vehicle is correct.

        OK
        The part number is correct.

    NG

    REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK)

    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