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Defogger System

This system uses the multiplex communication system, so check diagnosis system of the multiplex communication system before you proceed with troubleshooting. Refer to MULTIPLEX COMMUNICATION SYSTEM .

DEFOGGER SYSTEM PROBLEM SYMPTOM

Symptom Suspect Area Action
Rear window defogger does not operate. 1. HTR Fuse POWER SOURCE
2. DEFM-Fuse POWER SOURCE
3. Defogger Relay Circuit REAR DEFOGGER RELAY CIRCUIT
4. Defogger Switch (in A/C Panel Switch) DEFOGGER SWITCH CIRCUIT
5. Defogger Wire DEFOGGER WIRE
6. Wire Harness -
7. Body No. 1 ECU BODY ECU NO. 1 CONTROL SYSTEM OPERATION CHECK
Mirror defogger does not operate. 1. MIR-HTR Fuse (Passenger Side J/B) POWER SOURCE
2. Mirror Heater Relay MIRROR DEFOGGER RELAY CIRCUIT
3. Mirror Heater MIRROR DEFOGGER
4. Wire Harness -