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Home >> Lexus >> 2003 >> IS 300 Base, Automatic >> Repair and Diagnosis >> Body & Frame >> Windows >> Troubleshooting (Body Electrical) >> Problem Symptoms Table >> Key Unlock Warning Switch
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Key Unlock Warning Switch

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

PROBLEM SYMPTOMS - KEY UNLOCK WARNING SYSTEM DOESN'T OPERATE

Symptom Suspect Area Go To
Key unlock warning system does not operate. (The buzzer sounds when the ignition key is ACC or ON)
  1. Ignition Switch
  2. Key Unlock Warning Switch
  3. Body ECU
  4. Combination Meter
  5. Wire Harness
  1. INSPECTION
  2. INSPECTION
  3. BODY CONTROL SYSTEM
  4. CIRCUIT TESTS
  5. -

w/o Daytime running light system: 

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