PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:B2064

DTC Code DTC Name
B2064 Vehicle Type Signal Malfunction

DESCRIPTION

The seat belt control ECU is connected to the main body ECU (multiplex network body ECU) using CAN communication.

The seat belt control ECU receives vehicle model information from the main body ECU (multiplex network body ECU) and determines whether the seat belt buckle switch information is for the driver seat or the passenger seat.

DTC B2064 is stored when CAN communication with the main body ECU (multiplex network body ECU) is normal and communication is available, but the steering wheel position information is not set or varies.

DTC No. DTC Detection Condition Trouble Area
B2064 Communication with the main body ECU is normal and received steering wheel position information is not set (three times in succession).

  • CAN communication system

  • Seat belt control ECU

  • Main body ECU (multiplex network body ECU)

INSPECTION PROCEDURE

Tech Tips

This circuit uses CAN communication. Therefore, be sure to check that the CAN communication system is normal before performing inspection.

PROCEDURE


  1. CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM)


    1. Clear the DTCs Click here.

    2. Recheck for DTCs.

      OK
      CAN communication system DTCs are not output.

    NG

    GO TO CAN COMMUNICATION SYSTEM Click here

    OK

  2. CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Pre-Crash / Trouble Codes.

    5. Clear the DTCs Click here.

    6. Recheck for DTCs.

      OK
      DTC B2064 is not output.

    NG

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

    OK

    CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) Click here

  3. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)


    1. Replace the main body ECU (multiplex network body ECU) Click here.


    NEXT

  4. CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Pre-Crash / Trouble Codes.

    5. Clear the DTCs Click here.

    6. Recheck for DTCs.

      OK
      DTC B2064 is not output.

    NG

    REPLACE SEAT BELT CONTROL ECU Click here

    OK

    END (MAIN BODY ECU WAS DEFECTIVE)