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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
Rear left side power window does not operate.
  1. Power window motor circuit
  2. Rear door LH 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. Rear door LH ECU
  4. Theft deterrent ECU
  1. POWER SOURCE CIRCUIT 
  2. DTC B1238 JAM PROTECTION PULSE SWITCH CIRCUIT ON REAR LEFT 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 installed correctly?
  4. Rear door LH ECU
  1. POWER SOURCE CIRCUIT 
  2. POWER WINDOW MOTOR CIRCUIT 
  3. -
  4. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
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