OCCUPANT CLASSIFICATION SYSTEM Trouble in Passenger Airbag ON/OFF Indicator

DESCRIPTION

The occupant classification system detects the front passenger seat condition. It then displays the front passenger airbag and front passenger side knee airbag condition (activated/not activated) using the passenger airbag ON/OFF indicator.

Tech Tips

Approximately 6 seconds after the power switch is turned on (IG), the passenger airbag ON/OFF indicator will indicate ON/OFF depending on the conditions listed below.

Front Passenger Seat Condition Passenger Airbag ON/OFF Indicator SRS Warning Light
ON Indicator OFF Indicator
Vacant OFF ON OFF
Adult is seated. ON OFF OFF
Child is seated. OFF ON OFF
Child restraint system is installed.
Occupant classification system failure OFF ON ON

INSPECTION PROCEDURE

Note

After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work Click here.

PROCEDURE


  1. CHECK SRS WARNING LIGHT


    1. Turn the power switch on (IG), and check the SRS warning light condition.

      Tech Tips

      If passenger airbag ON/OFF indicator trouble occurs, the SRS warning light does not illuminate. If the light comes on, a DTC is stored. Troubleshoot for the DTC.

      OK
      After the primary check period, the SRS warning light goes off.

      Tech Tips

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


    NG

    GO TO AIRBAG SYSTEM Click here

    OK

  2. PERFORM ZERO POINT CALIBRATION AND SENSITIVITY CHECK


    1. Using the Techstream, perform Zero Point Calibration and Sensitivity Check Click here.

      OK
      "Zero Point Calibration is complete." and "Sensitivity Check is complete." are displayed.

    NG

    RETIGHTEN FRONT SEAT ASSEMBLY RH BOLT Click here

    OK

    END

  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 Click here for Manual Seat, Click here for Power Seat).


    NEXT

  4. PERFORM ZERO POINT CALIBRATION AND SENSITIVITY CHECK


    1. Using the Techstream, perform Zero Point Calibration and Sensitivity Check Click here.

      OK
      "Zero Point Calibration is complete." and "Sensitivity Check is complete." are displayed.

    NG

    READ VALUE USING TECHSTREAM Click here

    OK

    END

  5. READ VALUE USING TECHSTREAM


    1. Using the Techstream, read Data List Click here.


      1. Read the display when the passenger side buckle switch is operated.

        Occupant Detection
        Tester Display Measurement Item / Range Normal Condition Diagnostic Note
        Passenger Buckle SW

        Passenger side buckle switch/

        Set: The seat belt is fastened

        Unset: The seat belt is not fastened

        NG: Data is not determined

        		 Set/Unset -
        OK
        The Techstream display changes correctly in accordance with the operation of the buckle switch.

    NG

    CHECK CONNECTORS Click here

    OK

  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 and 2 rear occupant classification sensors.

    4. Check that the terminals of the connectors are not damaged.

      OK
      The terminals are not deformed or damaged.

    NG

    REPLACE FRONT SEAT WIRE RH

    OK

  7. REPLACE OCCUPANT DETECTION ECU


    1. Connect the connectors to the 2 rear occupant classification sensors.

    2. Replace the occupant detection ECU Click here.

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


    NEXT

  8. PERFORM ZERO POINT CALIBRATION AND SENSITIVITY CHECK


    1. Using the Techstream, perform Zero Point Calibration and Sensitivity Check Click here.


    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 damaged.

      OK
      The terminals are not deformed or damaged.

    NG

    REPLACE FRONT SEAT WIRE RH

    OK

  10. REPLACE FRONT SEAT INNER BELT ASSEMBLY RH


    1. Connect the connector to the occupant detection ECU.

    2. Replace the front seat inner belt assembly RH Click here.

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


    NEXT

  11. PERFORM ZERO POINT CALIBRATION AND SENSITIVITY CHECK


    1. Using the Techstream, perform Zero Point Calibration and Sensitivity Check Click here.


    NEXT

    END