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Home >> Lexus >> 2004 >> LX 470 >> Repair and Diagnosis >> Body & Frame >> Windows >> Body Electrical (Troubleshooting) >> Problem Symptoms Table >> Ignition Switch And Key Unlock Warning Switch:
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Ignition Switch And Key Unlock Warning Switch:

This system uses the body control system, so check the body control system before you proceed with troubleshooting (See HOW TO PROCEED WITH TROUBLESHOOTING ).

PROBLEM SYMPTOMS REFERENCE

Symptom Suspect Area Action
Ignition switch is not set to each position.
  1. Ignition switch
  2. Power source circuit
  1. INSPECTION
  2. -
Ignition key illumination does not comes on.
  1. Transponder key amplifier with coil
  2. Wire Harness
  3. Body ECU (Main)
  1. INSPECTION
  2. -
  3. HOW TO PROCEED WITH TROUBLESHOOTING
Key unlock warning system does not operate. (The buzzer does not sound when the driver's door is opened with the ignition OFF and key inserted)
  1. Key Unlock Warning Switch
  2. Door Courtesy Switch
  3. Wire Harness
  1. INSPECTION
  2. INSPECTION
  3. -
Key unlock warning system does not operate. (The buzzer sounds when the ignition key is in ACC or ON)
  1. Ignition Switch
  2. Wire Harness
  1. INSPECTION
  2. -