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SEAT BELT WARNING SYSTEM > Front Passenger Side Seat Belt Warning Light Malfunction

for Preparation Click here


DESCRIPTION

When the front passenger side seat belt is not fastened with the power switch on (IG) and the front passenger side seat occupied, the front passenger side seat belt warning light blinks. The occupant detection sensor detects if the front passenger side seat is occupied and sends signals to the combination meter assembly. The front seat inner belt assembly detects the front passenger side seat belt condition and sends signals to the combination meter assembly. After receiving the signals from the occupant detection sensor and front seat inner belt assembly, the combination meter illuminates the front passenger side seat belt warning light.

WIRING DIAGRAM


B230300E01


INSPECTION PROCEDURE

1.READ VALUE USING INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the intelligent tester on.

  1. Enter the following menus: Body / Combination Meter / Data List.

  1. Read the Data List according to the display on the intelligent tester.

    Combination Meter (Combination Meter Assembly) 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    P-Seatbelt Buckle SW
    		Front passenger side seat belt buckle switch signal/ON or OFF
    		ON: Front passenger side seat belt fastened.
    OFF: Front passenger side seat belt not fastened.
    		-

    OK:
    ON or OFF appears on the tester screen according to the front passenger side seat belt condition.



NG
Go to step 3
OK


2.PERFORM ACTIVE TEST USING INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the intelligent tester on.

  1. Enter the following menus: Body / Combination Meter / Active Test.

  1. Perform the Active Test according to the display on the intelligent tester.

    Combination Meter (Combination Meter Assembly) 
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Front Passenger Side Seat Belt
    		Front passenger side seat belt warning light
    		OFF or ON
    		Confirm that the vehicle is stopped with the engine idling.

    OK:
    The front passenger side seat belt warning light on the air conditioning control assembly operates normally.



NG
Go to step 6
OK

REPLACE NO. 3 METER CIRCUIT PLATE (Click here)  

3.CHECK HARNESS AND CONNECTOR (FRONT PASSENGER SIDE SEAT INNER BELT - COMBINATION METER)


    B230301E01

  1. Disconnect the L27 meter connector.

  1. Disconnect the S22*1 or R5*2 belt connector.

    1. *1: for LHD
    2. *2: for RHD

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    L27-24 (SW) - S22-3 (+)*1
    L27-24 (SW) - R5-3 (+)*2
    		Always
    		Below 1 Ω
    L27-24 (SW) - Body ground
    		Always
    		10 kΩ or higher
    S22-2 (E) - Body ground*1
    R5-2 (E) - Body ground*2
    		Always
    		Below 1 Ω

    1. *1: for LHD
    2. *2: for RHD
    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Combination Meter Assembly)
    *2
    		Front view of wire harness connector
    (to Front Seat Inner Belt Assembly (Front Passenger Side))
    *3
    		for LHD
    *4
    		for RHD



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.INSPECT OCCUPANT DETECTION SENSOR (SEPARATE TYPE FRONT SEAT CUSHION PAD)


    B202362E04

  1. Remove the front seat assembly (Click here).

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    B-1 - B-3
    		Front passenger side seat occupied
    		Below 100 Ω
    B-1 - B-3
    		Front passenger side seat not occupied
    		1 MΩ or higher

    Text in Illustration 
    *1
    		Component without harness connected
    (Occupant Detection Sensor (Separate Type Front Seat Cushion Pad))



NG
REPLACE OCCUPANT DETECTION SENSOR (SEPARATE TYPE FRONT SEAT CUSHION PAD) (Click here)
OK


5.INSPECT FRONT SEAT INNER BELT ASSEMBLY (FRONT PASSENGER SIDE)


    B202370E09

  1. Remove the front seat inner belt assembly (front passenger side) (Click here).

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    S22-3 (+) - B-1*1
    R5-3 (+) - B-1*2
    		Always
    		Below 1 Ω
    S22-2 (E) - B-3*1
    R5-2 (E) - B-3*2
    		Front passenger side seat belt unfastened
    		Below 1 Ω
    S22-2 (E) - B-3*1
    R5-2 (E) - B-3*2
    		Front passenger side seat belt fastened
    		10 kΩ or higher

    1. *1: for LHD
    2. *2: for RHD
    Text in Illustration 
    *1
    		Component without harness connected
    (Front Seat Inner Belt Assembly (Front Passenger Side))
    *2
    		Front view of wire harness connector
    (to Occupant Detection Sensor (Separate Type Front Seat Cushion Pad))
    *3
    		for LHD
    *4
    		for RHD



NG
REPLACE FRONT SEAT INNER BELT ASSEMBLY (FRONT PASSENGER SIDE) (Click here)
OK

REPLACE NO. 3 METER CIRCUIT PLATE (Click here)  

6.CHECK HARNESS AND CONNECTOR (PASSENGER SEAT BELT WARNING LIGHT - BATTERY)


    B230277E01

  1. Disconnect the M2 connector.

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    M2-6 (IG+) - Body ground
    		Power switch on (IG)
    		11 to 14 V
    M2-6 (IG+) - Body ground
    		Power switch off
    		Below 1 V

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Passenger Seat Belt Warning Light Assembly)



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


7.CHECK HARNESS AND CONNECTOR (COMBINATION METER - PASSENGER SEAT BELT WARNING LIGHT)


    B230292E01

  1. Disconnect the L27 connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    L27-21 (PBLT) - M2-3 (PBEW)
    		Always
    		Below 1 Ω
    L27-21 (PBLT)- Body ground
    		Always
    		10 kΩ or higher

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Combination Meter Assembly)
    *2
    		Front view of wire harness connector
    (to Passenger Seat Belt Warning Light Assembly)



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


8.CHECK HARNESS AND CONNECTOR (COMBINATION METER - BATTERY)

  1. Reconnect the M2 connector.



    B203742E03

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    L27-21 (PBLT) - Body ground
    		Power switch on (IG)
    		11 to 14 V
    L27-21 (PBLT) - Body ground
    		Power switch off
    		Below 1 V

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Combination Meter Assembly)



NG
REPLACE PASSENGER SEAT BELT WARNING LIGHT ASSEMBLY (Click here)
OK

REPLACE NO. 3 METER CIRCUIT PLATE (Click here)