Toyota CH-R Service Manual: Front Passenger Side Seat Belt Warning Light Malfunction

Toyota CH-R Service Manual / Seat Belt / Seat Belt Warning System(w/o Occupant Classification System) / Front Passenger Side Seat Belt Warning Light Malfunction

DESCRIPTION

When the ignition switch is ON, the combination meter assembly monitors the state of the front passenger side seat and the front seat inner belt assembly (front passenger seat) and also whether the front passenger seat is occupied. If the front passenger side seat belt is not fastened, the seat belt warning light of the combination meter assembly blinks. If the seat belt is fastened, the warning light goes off.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

HINT:

  • The seat belt warning light on the combination meter assembly is used for both the driver seat and front passenger seat. Check that the operation of the seat belt warning light is normal first.

    Click here

  • If the seat belt warning light does not operate for both the driver seat and front passenger seat, replace the combination meter assembly.

    Click here

PROCEDURE

1.

READ VALUE USING TECHSTREAM (P-SEATBELT BUCKLE SW)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Combination Meter / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Combination Meter > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

P-Seatbelt Buckle SW

Front passenger seat belt buckle switch signal

ON or OFF

ON: Front passenger seat belt not fastened

OFF: Front passenger seat belt fastened

Perform the inspection while sitting in the front passenger side seat.
Body Electrical > Combination Meter > Data List

Tester Display

P-Seatbelt Buckle SW

Result

Proceed to

ON or OFF is displayed on the Techstream screen according to the front passenger side seat belt condition and front passenger seat condition (occupied or unoccupied)

A

ON or OFF is not displayed normally on the Techstream screen according to the front passenger side seat belt condition

B
A

REPLACE COMBINATION METER ASSEMBLY

B

2.

CHECK HARNESS AND CONNECTOR (FRONT SEAT INNER BELT ASSEMBLY (FRONT PASSENGER SEAT) - COMBINATION METER ASSEMBLY AND BODY GROUND)

(a) Disconnect the F4 combination meter assembly connector.

(b) Disconnect the M53 front seat inner belt assembly (front passenger seat) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F4-7 (PKBI) - M53-3 (+)

Always

Below 1 Ω

F4-7 (PKBI) or M53-3 (+) - Body ground

Always

10 kΩ or higher

M53-2 (E) - Body ground

Always

Below 1 Ω
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

INSPECT FRONT SEAT INNER BELT ASSEMBLY (FRONT PASSENGER SEAT)

(a) Remove the front seat inner belt assembly (front passenger seat).

Click here

(b) Inspect the front seat inner belt assembly (front passenger seat).

Click here

NG

REPLACE FRONT SEAT INNER BELT ASSEMBLY (FRONT PASSENGER SEAT)

OK

4.

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

(a) Remove the separate type front seat cushion pad (occupant detection sensor).

Click here

(b) Inspect the separate type front seat cushion pad (occupant detection sensor).

Click here

OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPLACE SEPARATE TYPE FRONT SEAT CUSHION PAD (OCCUPANT DETECTION SENSOR)

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