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Home >> Lexus >> 2004 >> GS 430 >> Repair and Diagnosis >> Electrical >> Body Electrical >> Body Electrical (Troubleshooting) >> Problem Symptoms Table >> Defogger System

Defogger System

This system uses the multiplex communication system, so check diagnosis system of the multiplex communication system before you proceed with troubleshooting.

SYMPTOM

Symptom Suspect Area See
Rear window defogger does not operate.
  1. HTR Fuse
  2. DEF M-Fuse
  3. Defogger Relay Circuit
  4. Defogger Switch (in A/C Panel Switch)
  5. Defogger Wire
  6. Wire Harness
  7. Body No. 1 ECU
 INSPECTION
INSPECTION
REAR DEFOGGER RELAY CIRCUIT
INSPECTION
INSPECTION
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HOW TO PROCEED WITH TROUBLESHOOTING
Mirror defogger does not operate.
  1. MIR-HTR Fuse (Passenger Side J/B)
  2. Mirror Heater Relay
  3. Mirror Heater
  4. Wire Harness
 INSPECTION
INSPECTION
INSPECTION
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