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Home >> Toyota >> 2022 >> Avalon XLE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 64 (Occupant Classification System - Diagnostic Codes & Symptom Tests (Hybrid)) >> OCCUPANT CLASSIFICATION SYSTEM (for HV Model) >> Trouble in Passenger Airbag ON/OFF Indicator [04/2018 - ] >> Procedure

Trouble in Passenger Airbag ON/OFF Indicator [04/2018 - ]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK SRS WARNING LIGHT 
    1. Turn the power switch on (IG), and check the SRS warning light condition.

      OK

      After the primary check period, the SRS warning light turns off.

      HINT: 

      The primary check is performed for approximately 6 seconds after the power switch is turned on (IG).

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    GO TO AIRBAG SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [04/2018 - ] 

    Result: 

    OK 

    See step  2

  2. PERFORM ZERO POINT CALIBRATION 
    1. Using the Techstream, perform Zero Point Calibration.

      Refer to INITIALIZATION [04/2018 - ]

      OK

      "Zero Point Calibration is complete." is displayed.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END 

    Result: 

    NG 

    See step  3

  3. RETIGHTEN FRONT SEAT ASSEMBLY RH BOLT 
    1. Loosen the 4 installation bolts of the front seat assembly RH.
    2. Tighten the 4 installation bolts of the front seat assembly RH to the specified torque.

      Refer to INSTALLATION [04/2018 - 08/2020] , or refer to INSTALLATION [08/2020 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  4

  4. PERFORM ZERO POINT CALIBRATION 
    1. Using the Techstream, perform Zero Point Calibration.

      Refer to INITIALIZATION [04/2018 - ]

      OK

      "Zero Point Calibration is complete." is displayed.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END 

    Result: 

    NG 

    See step  5

  5. READ VALUE USING TECHSTREAM 
    1. Turn the power switch off.
    2. Connect the Techstream to the DLC3.
    3. Turn the power switch on (IG).
    4. Turn the Techstream on.
    5. Enter the following menus: Body Electrical / Occupant Detection / Data List.
    6. Read the Data List according to the display on the Techstream.

      Body Electrical > Occupant Detection > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Passenger Buckle SW Front passenger side buckle switch NG, Set or Unset Set: Front passenger seat belt is fastened
      Unset: Front passenger seat belt is not fastened      		 "NG" will be displayed immediately after the power switch is turned on (IG).

      Body Electrical > Occupant Detection > Data List 

      Tester Display
      Passenger Buckle SW

      OK

      The Techstream display changes correctly in accordance with the operation of the front passenger side buckle switch.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  9

    Result: 

    OK 

    See step  6

  6. CHECK CONNECTORS 
    1. Turn the power switch off.
    2. Disconnect the cable from the negative (-) auxiliary battery terminal.
    3. Disconnect the connectors from the occupant detection ECU, front occupant classification sensor LH and rear occupant classification sensor LH.
    4. Check that the terminals of the connectors are not deformed or damaged.

      OK

      The terminals are not deformed or damaged.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE FRONT SEAT WIRE RH 

    Result: 

    OK 

    See step  7

  7. REPLACE OCCUPANT DETECTION ECU 
    1. Connect the connectors to the front occupant classification sensor LH and rear occupant classification sensor LH.
    2. Replace the occupant detection ECU.

      Refer to REMOVAL [04/2018 - 08/2021] , or refer to REMOVAL [08/2021 - ]

    3. Connect the cable to the negative (-) auxiliary battery terminal.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  8

  8. PERFORM ZERO POINT CALIBRATION 
    1. Using the Techstream, perform Zero Point Calibration.

      Refer to INITIALIZATION [04/2018 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    END 

  9. CHECK CONNECTORS 
    1. Turn the power switch off.
    2. Disconnect the cable from the negative (-) auxiliary battery terminal.
    3. Disconnect the connectors from the occupant detection ECU and front seat inner belt assembly RH.
    4. Check that the terminals of the connectors are not deformed or damaged.

      OK

      The terminals are not deformed or damaged.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE FRONT SEAT WIRE RH 

    Result: 

    OK 

    See step  10

  10. REPLACE FRONT SEAT INNER BELT ASSEMBLY RH 
    1. Turn the power switch off.
    2. Disconnect the cable from the negative (-) auxiliary battery terminal.
    3. Replace the front seat inner belt assembly RH.

      Refer to REMOVAL [04/2018 - 08/2021] , or refer to REMOVAL [08/2021 - ]

    4. Connect the cable to the negative (-) auxiliary battery terminal.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  11

  11. PERFORM ZERO POINT CALIBRATION 
    1. Using the Techstream, perform Zero Point Calibration.

      Refer to INITIALIZATION [04/2018 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    END 

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