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 instrument panel passenger airbag assembly and front seat cushion airbag assembly RH condition (activated/not activated) using the passenger airbag ON/OFF indicator.

• *1: The system judges a person of average adult weight or more as an adult. If a smaller adult sits in the front passenger seat, the system may not recognize them as an adult depending on their physique and posture.

• *2: The system may not recognize a child or a child in a child restraint system as a child depending on factors such as the positioning of the child restraint system or the child's physique or posture.

CAUTION / NOTICE / HINT

PROCEDURE

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 goes off.

      Tech Tips

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

      Result
      Proceed to OK NG

   
   

   NG

   GO TO AIRBAG SYSTEM Click here

   OK

2. PERFORM ZERO POINT CALIBRATION

   
   

   1. Using the GTS, perform Zero Point Calibration.

      Click here

      
      Body Electrical > Occupant Detection > Utility

      Tester Display
      Zero Point Calibration

      OK
      "Zero Point Calibration is complete." is displayed.

      Result
      Proceed to OK NG

   
   

   OK

   END (NORMAL AFTER PERFORMING ZERO POINT CALIBRATION)

   NG

3. RETIGHTEN FRONT SEAT ASSEMBLY RH BOLT

   
   

   1. Loosen the 4 installation bolts of the front seat assembly RH.

      Click here

   2. Tighten the 4 installation bolts of the front seat assembly RH to the specified torque.

      Click here

      Result
      Proceed to NEXT

   
   

   NEXT

4. PERFORM ZERO POINT CALIBRATION

   
   

   1. Using the GTS, perform Zero Point Calibration.

      Click here

      
      Body Electrical > Occupant Detection > Utility

      Tester Display
      Zero Point Calibration

      OK
      "Zero Point Calibration is complete." is displayed.

      Result
      Proceed to OK NG

   
   

   OK

   END (THE 4 INSTALLATION BOLTS WAS LOOSEN)

   NG

5. READ VALUE USING GTS

   
   

   1. Turn the power switch off.

   2. Connect the GTS to the DLC3.

   3. Turn the power switch on (IG).

   4. Turn the GTS on.

   5. Enter the following menus: Body Electrical / Occupant Detection / Data List.

   6. Read the Data List according to the display on the GTS.

      
      Body Electrical > Occupant Detection > Data List

      Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
      Passenger Buckle SW	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.

      
      Body Electrical > Occupant Detection > Data List

      Tester Display
      Passenger Buckle SW

      OK
      The GTS display changes correctly in accordance with the operation of the passenger side buckle switch.

      Result
      Proceed to OK NG

   
   

   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, 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

   
   

   NG

   REPLACE FRONT SEAT WIRE RH

   OK

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 with a new one.

      Click here

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

      Result
      Proceed to NEXT

   
   

   NEXT

8. PERFORM ZERO POINT CALIBRATION

   
   

   1. Using the GTS, perform Zero Point Calibration.

      Click here

      
      Body Electrical > Occupant Detection > Utility

      Tester Display
      Zero Point Calibration

      Result
      Proceed to NEXT

   
   

   NEXT

   END (OCCUPANT DETECTION ECU WAS DEFECTIVE)

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

   
   

   NG

   REPLACE FRONT SEAT WIRE RH

   OK

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 with a new one.

       Click here

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

       Result
       Proceed to NEXT

    
    

    NEXT

11. PERFORM ZERO POINT CALIBRATION

    
    

    1. Using the GTS, perform Zero Point Calibration.

       Click here

       
       Body Electrical > Occupant Detection > Utility

       Tester Display
       Zero Point Calibration

       Result
       Proceed to NEXT

    
    

    NEXT

    END (FRONT SEAT INNER BELT ASSEMBLY RH WAS DEFECTIVE)