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Home >> Toyota >> 2015 >> Avalon Hybrid Limited >> Repair and Diagnosis >> Restraints >> Seat Belts >> Pre-Collision System - Diagnostic Codes & Circuit Tests - (Hybrid) >> Pre-Collision System >> DTC B2074: Driver Side Seat Belt Buckle Switch Circuit Malfunction; DTC B2075: Passenger Side Seat Belt Buckle Switch Circuit Malfunction [10/2014 - 10/2015] >> Procedure

DTC B2074: Driver Side Seat Belt Buckle Switch Circuit Malfunction; DTC B2075: Passenger Side Seat Belt Buckle Switch Circuit Malfunction [10/2014 - 10/2015]: Procedure

  1. CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM) 
    1. Clear the DTCs (Refer to DIAGNOSIS SYSTEM [10/2014 - 10/2015] ).
    2. Recheck for DTCs.

      OK

      CAN communication system DTCs are not output.

    Result: 

    NG 

    GO TO CAN COMMUNICATION SYSTEM 

    (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 10/2015] )

    Result: 

    OK 

    See step  2

  2. CHECK DTC OUTPUT (AIRBAG SYSTEM) 
    1. Check for airbag system DTCs (Refer to DTC CHECK / CLEAR [10/2014 - ] ).

      OK

      Airbag system DTCs are not output.

    Result: 

    NG 

    GO TO AIRBAG SYSTEM 

    (Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2014 - ] )

    Result: 

    OK 

    See step  3

  3. CHECK DTC OUTPUT (OCCUPANT CLASSIFICATION SYSTEM) 
    1. Check for occupant classification system DTCs (Refer to DTC CHECK / CLEAR [10/2014 - ] ).

      OK

      Occupant classification system DTCs are not output.

    Result: 

    NG 

    GO TO OCCUPANT CLASSIFICATION SYSTEM 

    (Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2014 - ] )

    Result: 

    OK 

    See step  4

  4. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Enter the following menus: Body Electrical / Pre-Collision / Trouble Codes.
    4. Clear the DTCs (Refer to DTC CHECK / CLEAR [10/2014 - 10/2015] ).
    5. Recheck for DTCs.

      OK

      DTC B2074 or B2075 is not output.

    Result: 

    OK 

    CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) 

    (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 10/2015] )

    Result: 

    NG 

    REPLACE SEAT BELT CONTROL ECU 

    (Refer to COMPONENTS [10/2014 - 10/2015] )