2005 Lexus LS 430FACTORY OEM SERVICE PROCEDURE

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE - POWER WINDOW CONTROL SYSTEM

Symptoms Suspected Area
Power window does not operate at all
  • 1. Driver door power source circuit
  • 2. Power window regulator master switch circuit
  • 3. Driver door ECU
Driver side power window does not operate
  1. Driver door power source circuit
  2. Power window motor circuit (driver side)
  3. Power window regulator master switch circuit
  4. Driver door ECU
Passenger side power window does not operate
  1. Passenger door power source circuit
  2. Power window motor circuit (passenger side)
  3. Power window regulator switch circuit (passenger side)
  4. Passenger door ECU
Rear LH power window does not operate
  1. Rear door LH power source circuit
  2. Power window motor circuit (rear LH)
  3. Power window regulator switch circuit (rear LH)
  4. Rear door LH ECU
Rear RH power window does not operate
  1. Rear door RH power source circuit
  2. Power window motor circuit (rear RH)
  3. Power window regulator switch circuit (rear RH)
  4. Rear door RH ECU
Jam protection function and AUTO UP/DOWN function do not operate on driver side
  1. Power window regulator master switch circuit
  2. Limit switch circuit
  3. Pulse sensor circuit
Jam protection function and AUTO UP/DOWN function do not operate on passenger side
  1. Power window regulator switch circuit (passenger side)
  2. Limit switch circuit
  3. Pulse sensor circuit
Jam protection function and AUTO UP/DOWN function do not operate at rear LH
  1. Power window regulator switch circuit (rear LH)
  2. Limit switch circuit
  3. Pulse sensor circuit
Jam protection function and AUTO UP/DOWN function do not operate at rear RH
  1. Power window regulator switch circuit (rear RH)
  2. Limit switch circuit
  3. Pulse sensor circuit
Window lock function does not operate
  1. Power window regulator master switch circuit
  2. Window lock switch circuit
  3. Power window regulator switch circuit (passenger side)
  4. Power window regulator switch circuit (rear LH)
  5. Power window regulator switch circuit (rear RH)
  6. Driver door ECU
  7. Passenger door ECU
  8. Rear door LH ECU
  9. Rear door RH ECU
Window control function does not operate
  1. Power window regulator master switch circuit
  2. Window lock switch circuit
  3. Power window motor circuit (passenger side)
  4. Power window motor circuit (rear LH)
  5. Power window motor circuit (rear RH)
  6. Driver door ECU
  7. Passenger door ECU
  8. Rear door LH ECU
  9. Rear door RH ECU
Transmitter cannot open power windows
  1. Transmitter (w/Smart key system)

    (w/o Smart key system)

  2. Door control receiver (w/Smart key system)

    (w/o Smart key system)

  3. Theft warning ECU
Door key linked power window operation does not function
  1. Door key lock and unlock warning switch
  2. Door lock control system
  3. Driver door ECU
Key-off operation does not function
  1. Power window master switch circuit
  2. Power window regulator motor circuit (driver side)
  3. Power window regulator motor circuit (passenger side)
  4. Power window regulator motor circuit (rear LH)
  5. Power window regulator motor circuit (rear RH)
  6. Door courtesy switch circuit
  7. Driver door ECU
  8. Passenger door ECU
  9. Rear door LH ECU
  10. Rear door RH ECU
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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