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Wireless Door Lock Control

WARNING: This page is about a different car, the 2004 Lexus GS 430 and 2004 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
PROBLEM SYMPTOMS TABLE - WIRELESS DOOR LOCK CONTROL SYSTEM

Symptom Suspect Area
All function of wireless door lock control system do not operate.
  1. Transmitter
  2. Wireless tuner circuit
  3. Key unlock warning switch circuit
  4. Body ECU No. 2
  5. Body ECU No. 1
Lock (or unlock) function does not operate.
  1. Door key lock and unlock switch circuit
  2. Door unlock detection switch circuit
  3. Any door ECU
  4. Body ECU No. 1
Automatic lock function operates even if any door is opened within 30 seconds after all doors are unlocked by wireless door lock control system.
  1. Door courtesy switch circuit
  2. Any door ECU
  3. Body ECU No. 1
Wireless door lock operates, but the buzzer does not sound,
  1. Wireless door lock buzzer circuit
  2. Body ECU No. 1
Buzzer sound, but wireless door lock function does not operate.
  1. Body ECU No. 1
Luggage compartment door opener.
  1. Luggage compartment door opener motor circuit
  2. Body ECU No. 1
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