LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2009 >> SC 430 >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Seat Belt Warning System (With OCS) (Diagnostics) >> SEAT BELT WARNING SYSTEM (w/ Occupant Classification System) >> Problem Symptoms Table >> Problem Symptoms Table (From 10/2008)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Problem Symptoms Table (From 10/2008)

HINT: 

Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

SEAT BELT WARNING SYSTEM:

Symptom Suspected Area See
Driver seat belt warning light does not operate Multiplex communication system Refer to Driver Side Seat Belt Warning Light does not Operate 
Meter/gauge system Refer to Driver Side Seat Belt Warning Light does not Operate 
Main body ECU Refer to Driver Side Seat Belt Warning Light does not Operate 
Front seat inner belt LH Refer to Driver Side Seat Belt Warning Light does not Operate 
Wire harness Refer to Driver Side Seat Belt Warning Light does not Operate 
Front seat warning light does not operate Multiplex communication system Refer to Front Passenger Side Seat Belt Warning Light Malfunction 
Airbag system Refer to Front Passenger Side Seat Belt Warning Light Malfunction 
Occupant classification system Refer to Front Passenger Side Seat Belt Warning Light Malfunction 
P-IG fuse Refer to Front Passenger Side Seat Belt Warning Light Malfunction 
Front passenger warning light Refer to Front Passenger Side Seat Belt Warning Light Malfunction 
Front seat inner belt RH Refer to Front Passenger Side Seat Belt Warning Light Malfunction