Front Passenger Side Seat Belt Warning Light Malfunction

SEAT BELT: SEAT BELT WARNING SYSTEM: Front Passenger Side Seat Belt Warning Light Malfunction
- 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 occupant classification sensor when the front passenger side seat is occupied with the power switch on (IG). If the front passenger side seat belt is not fastened, the front passenger side seat belt warning light blinks. If the seat belt is fastened, the warning light goes off.

WIRING DIAGRAM





INSPECTION PROCEDURE

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 How To Proceed With Troubleshooting.

PROCEDURE

1. CHECK DTC OUTPUT (OCCUPANT CLASSIFICATION SYSTEM)

(a) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

(b) Recheck for DTCs.

Result:





B -- GO TO OCCUPANT CLASSIFICATION SYSTEM Occupant Classification System
A -- Continue to next step.

2. CHECK DTC OUTPUT (AIRBAG SYSTEM)

(a) Clear the DTC DTC Check / Clear.

(b) Recheck for DTCs.

Result:





B -- GO TO AIRBAG SYSTEM Airbag System
A -- Continue to next step.

3. PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(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)





OK:

The front passenger side seat belt warning light operates normally.

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

OK -- REPLACE NO. 3 METER CIRCUIT PLATE Disassembly

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

(a) Disconnect the M2 connector.





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

Standard Voltage:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

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

(a) Disconnect the L27 connector.





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

Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

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

(a) Reconnect the M2 connector.

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





Standard Voltage:





Text in Illustration





NG -- REPLACE PASSENGER SEAT BELT WARNING LIGHT ASSEMBLY Removal

OK -- REPLACE NO. 3 METER CIRCUIT PLATE Disassembly