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. Detection Item DTC Detection Condition Trouble Area
U1331 Software Incompatibility with Body Control Module "B" Destination information of the main 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 system is turned on.

  • Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

  • The vehicle battery supplies power to the main body ECU (multiplex network body ECU) via the door control battery. Therefore, before proceeding with troubleshooting, perform an on-vehicle inspection and confirm that the main body ECU (multiplex network body ECU) power source circuit is normal.*

    Click here


    • *: w/o Canister Pump Module with Door Ajar Warning Buzzer Function

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 to the vehicle is correct.

        OK
        The part number is correct.
      Result
      Proceed to
      OK
      NG

    NG

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

    OK

  2. CHECK DTC


    1. Turn the engine switch off.

    2. Turn the engine switch on (IG).

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


      Body Electrical > Blind Spot Monitor Master > Trouble Codes
      Body Electrical > Blind Spot Monitor Slave > Trouble Codes
      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