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

DESCRIPTION

The combination meter detects the state of the front seat inner belt RH*1 (or LH*2) when the front passenger seat is occupied with the ignition switch ON. If the front passenger seat belt is not fastened, the front passenger side seat belt warning light of the telltale light blinks. If the seat belt is fastened, the warning light goes off.


WIRING DIAGRAM

A01INNCE06

INSPECTION PROCEDURE

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (FRONT PASSENGER SIDE SEAT BELT WARNING LIGHT)


    1. Operate the intelligent tester according to the steps on the display and select Active Test Click here.

      Combination Meter
      Item Test Part Control Range Diagnostic Note
      Front passenger side seat belt Front passenger side seat belt warning light ON/OFF Confirm that the vehicle is stopped and the engine is idling.
      Result
      Result Proceed to
      Front passenger side seat belt warning light condition cannot be switched by Active Test A
      Front passenger side seat belt warning light condition can be switched by Active Test B

    B

    REPLACE FRONT SEAT INNER BELT ASSEMBLY Click here

    A

  2. CHECK HARNESS AND CONNECTOR (TELLTALE LIGHT - COMBINATION METER, BATTERY AND BODY GROUND)


    1. A01IPEDE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Telltale Light [w/o TOYOTA Parking Assist-sensor System])
      *2

      Front view of wire harness connector

      (to Telltale Light [w/ TOYOTA Parking Assist-sensor System])
      *3

      Front view of wire harness connector

      (to Combination Meter)

      Disconnect the H67 telltale light connector (w/o TOYOTA Parking Assist-sensor System).

    2. Disconnect the H98 telltale light connector (w/ TOYOTA Parking Assist-sensor System).

    3. Disconnect the H62 meter connector.

    4. Measure the resistance and voltage according to the value(s) in the table below.

      Standard Resistance
      w/o TOYOTA Parking Assist-sensor System
      Tester Connection Condition Specified Condition
      H67-3 (L) - H62- 7 (WRNP) Always Below 1 Ω
      H67-2 (E) - Body ground
      H67-3 (L) - Body ground Always 10 kΩ or higher
      w/ TOYOTA Parking Assist-sensor System
      Tester Connection Condition Specified Condition
      H98-14 (L) - H62- 7 (WRNP) Always Below 1 Ω
      H98-13 (E) - Body ground
      H98-14 (L) - Body ground Always 10 kΩ or higher
      Standard Voltage
      w/o TOYOTA Parking Assist-sensor System
      Tester Connection Switch Condition Specified Condition
      H67-4 (B) - Body ground Ignition switch ON 11 to 14 V
      w/ TOYOTA Parking Assist-sensor System
      Tester Connection Switch Condition Specified Condition
      H98-4 (B) - Body ground Ignition switch ON 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT TELLTALE LIGHT ASSEMBLY


    1. A01IOHSE01
      Text in Illustration
      *1 w/o TOYOTA Parking Assist-sensor System
      *2 w/ TOYOTA Parking Assist-sensor System

      Remove the telltale light Click here.

    2. Apply battery voltage to the telltale light connector.

    3. Check that the front passenger side seat belt warning light comes on.

      OK (w/o TOYOTA Parking Assist-sensor System)
      Measurement Connection Specified Condition

      Battery positive (+) → 4 (B)

      Battery negative (-) → 3 (L)

      Battery negative (-) → 2 (E)

      		 Front passenger side seat belt warning light comes on
      OK (w/ TOYOTA Parking Assist-sensor System)
      Measurement Connection Specified Condition

      Battery positive (+) → 4 (B)

      Battery negative (-) → 14 (L)

      Battery negative (-) → 13 (E)

      		 Front passenger side seat belt warning light comes on

    NG

    REPLACE TELLTALE LIGHT ASSEMBLY Click here

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

  4. REPLACE FRONT SEAT INNER BELT ASSEMBLY


    1. Temporarily replace the front seat inner belt RH*1 or LH*2 with a new or normally functioning one Click here.


      • *1: for LHD

      • *2: for RHD


    NEXT

  5. INSPECT SEPARATE TYPE FRONT SEAT CUSHION PAD


    1. A01IU0XE02

      Remove the front seat assembly Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 3 More than 147 N (15 kgf, 33.0 lbf) applied to occupant detection sensor Below 100 Ω

    NG

    REPLACE SEPARATE TYPE FRONT SEAT CUSHION PAD Click here

    OK

  6. CHECK FRONT PASSENGER SIDE SEAT BELT WARNING LIGHT


    1. Check the operation of the front passenger side seat belt warning light Click here.

      OK
      Front passenger side seat belt warning light operates normally.

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

    END (FRONT SEAT INNER BELT IS DEFECTIVE)