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Problem Symptoms Table

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

Problem symptom Suspected area
Door lock switch circuit on driver's door.
  1. Power window regulator master switch assembly
  2. Mutiplex network door ECU
  3. Wire harness
  4. Front door lock assembly
Door lock switch circuit on passenger's door.
  1. Door lock control switch assembly
  2. Mutiplex network door ECU
  3. Wire harness
  4. Front door lock assembly
Key confinement prevention function does not work properly.
  1. Key unlock warning switch assembly
  2. Door courtesy switch
  3. Door lock motor
  4. Mutiplex network door ECU
  5. Transponder key ECU
Door lock system does not operate at all.
  1. Power window regulator master switch assembly
  2. Door lock control switch
  3. Mutiplex network door ECU (driver's and passenger's)
  4. Theft warning ECU
Automatic locking function.
  1. Speedometer assembly
  2. Theft warning ECU
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