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Wireless Door Lock Control

WARNING: This page is about a different car, the 2004 Lexus IS 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. Key unlock warning switch circuit
  3. Wireless door lock ECU
  4. Body ECU
Lock (or unlock) function does not operate.
  1. Door key lock and unlock switch circuit
  2. Door unlock detection switch circuit
  3. Body ECU
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. Body ECU
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