Problem Symptoms Table

HINT:

Use 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.

PROBLEM SYMPTOMS TABLE - SEAT BELT WARNING SYSTEM

Symptom	Suspected Area
Driver side seat belt warning lamp does not blink (ignition switch is ON and buckle switch LH is OFF (unfastened))	D-IG fuse MPX-B2 fuse Front seat inner belt assy LH Combination meter assy Driver side J/B ECU Network gateway ECU Turn signal switch assy Multiplex network front lamp ECU Luggage room J/B ECU Multiplex tilt & telescopic ECU Wire harness
Passenger side seat belt warning lamp does not blink (ignition switch is ON, occupant detection sensor is ON and buckle switch RH is OFF (unfastened))	RADIO NO. 2 fuse MPX-B2 fuse Front seat inner belt assy RH Passenger seat belt warning lamp assy Occupant detection sensor Combination meter assy Passenger side J/B ECU Network gateway ECU Airbag sensor assy center Skid control ECU assy Tire pressure monitor receiver assy A/C amplifier assy ECM Wire harness

HINT:

The seat belt warning system is part of the large-scale multiplex communication system. This system features shared communication wiring that reduces the wiring complexity of the communication lines. The first step in any repair is to confirm the proper operation of the communication system. Proceed with troubleshooting after the communication has been verified (see the MULTIPLEX COMMUNICATION SYSTEM - DIAGNOSTICS ).