Front Passenger Side Seat Belt Warning Light Malfunction

DESCRIPTION

The occupant classification ECU detects the state of the front seat inner belt assembly RH and load sensor when the front passenger side seat is occupied with the ignition switch ON. If the front passenger side seat belt is not fastened, the front passenger side seat belt warning light on the accessory meter assembly blinks. If the seat belt is fastened, the warning light goes off.

WIRING DIAGRAM
CAUTION / NOTICE / HINT

NOTICE:

• Inspect the fuses for circuits related to this system before performing the following inspection procedure.
• The seat belt warning system uses the CAN communication system. First, confirm that there is no malfunction in the CAN communication system. Refer to the How to Proceed with Troubleshooting procedure (See page ).

PROCEDURE

1. CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM)

(a) Clear the DTC (See page ).

(b) Recheck for DTCs.

Result	Proceed to
DTC is not output	A
DTC is output	B

B

GO TO CAN COMMUNICATION SYSTEM

A

1. CHECK DTC OUTPUT (OCCUPANT CLASSIFICATION SYSTEM)

(a) Clear the DTC (See page ).

(b) Recheck for DTCs.

Result	Proceed to
DTC is not output	A
DTC is output	B

B

GO TO OCCUPANT CLASSIFICATION SYSTEM

A

1. CHECK DTC OUTPUT (AIRBAG SYSTEM)

(a) Clear the DTC (See page ).

(b) Recheck for DTCs.

Result	Proceed to
DTC is not output	A
DTC is output	B

B

GO TO AIRBAG SYSTEM

A

1. PERFORM ACTIVE TEST USING TECHSTREAM

(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 / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

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 stopped with the engine idling

OK:

The front passenger side seat belt warning light on the accessory meter assembly operates normally.

OK

REPLACE COMBINATION METER ASSEMBLY

NG

1. CHECK HARNESS AND CONNECTOR (BATTERY AND BODY GROUND)

(a) Disconnect the F2 connector.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
F2-1 (B) - Body ground	Always	11 to 14 V
F2-13 (IG+) - Body ground	Ignition switch ON	11 to 14 V
F2-13 (IG+) - Body ground	Ignition switch off	Below 1 V

Standard Resistance:

Tester Connection	Condition	Specified Condition
F2-12 (E) - Body ground	Always	Below 1 Ω

Text in Illustration

*1	Front view of wire harness connector (to Accessory Meter Assembly)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

1. CHECK HARNESS AND CONNECTOR (COMBINATION METER - ACCESSORY METER)

(a) Disconnect the E1 connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
E1-5 (P/SB) - F2-20 (PBEW)	Always	Below 1 Ω
F2-20 (PBEW) - Body ground	Always	10 kΩ or higher

Text in Illustration

*1	Front view of wire harness connector (to Accessory Meter Assembly)
*2	Front view of wire harness connector (to Combination Meter Assembly)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

1. REPLACE ACCESSORY METER ASSEMBLY

(a) Replace the accessory meter assembly (See page ).

NEXT

1. CHECK FRONT PASSENGER SIDE SEAT BELT WARNING LIGHT

(a) Check the front passenger side seat belt warning light operation (See page ).

OK

END (ACCESSORY METER ASSEMBLY WAS DEFECTIVE)

NG

REPLACE COMBINATION METER ASSEMBLY