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Problem Symptoms Table

PROBLEM SYMPTOMS TABLE - SEAT BELT WARNING SYSTEM

Symptom Suspected Area
Driver side seat belt warning lamp does not blink
  1. DOME fuse
  2. GAUGE fuse
  3. D-IG1 relay
  4. Combination meter
  5. Front seat inner belt assy LH
  6. Wire harness
Passenger side seat belt warning lamp does not blink
  1. DOME fuse
  2. GAUGE fuse
  3. P-IG fuse
  4. P-IG1 relay
  5. Front seat inner belt assy RH
  6. Occupant detection sensor
  7. Multi-display (w/LEXUS navigation)
  8. Clock (w/o LEXUS navigation)
  9. Airbag sensor assy
  10. 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 MULTIPLEX COMMUNICATION SYSTEM ).

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