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Power Window Control System:

WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
PROBLEM SYMPTOMS

Symptom Suspect Area See Section
Passenger side power window does not operate.
  1. Power window motor circuit
  2. Passenger door ECU
  1. POWER WINDOW MOTOR CIRCUIT 
  2. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Jam protection function and auto up or down function does not operate.
  1. Jam protection limit switch circuit
  2. Jam protection pulse switch circuit
  3. Passenger door ECU
  4. Theft deterrent ECU
  1. DTC B1233 JAM PROTECTION LIMIT SWITCH CIRCUIT ON PASSENGER DOOR 
  2. DTC B1234 JAM PROTECTION PULSE SWITCH CIRCUIT ON PASSENGER DOOR 
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
  4. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Window moves down without being ordered during the up operation.
  1. Jam protection limit switch circuit
  2. Power window motor circuit
  3. Is the window regular installation correctly?
  4. Passenger door ECU
  1. DTC B1233 JAM PROTECTION LIMIT SWITCH CIRCUIT ON PASSENGER DOOR 
  2. POWER WINDOW MOTOR CIRCUIT 
  3. -
  4. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
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