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BLIND SPOT MONITOR SYSTEM, Diagnostic DTC:U1331

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DTC Code DTC Name
U1331 Software Incompatibility with Body Control Module "B"
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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
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CAUTION / NOTICE / HINT

Note:

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

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

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PROCEDURE


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    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.
      Result
      Proceed to
      OK
      NG

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    CHECK DTC


    1. Clear the DTCs.

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      1. Body Electrical > Blind Spot Monitor Master > Clear DTCs



      1. Body Electrical > Blind Spot Monitor Slave > Clear DTCs


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


      1. Body Electrical > Blind Spot Monitor Master > Trouble Codes



      1. 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