2001 Lexus LS 430FACTORY OEM SERVICE PROCEDURE

Driver's Window

Disconnect window motor harness connector. Connect voltmeter positive lead to window motor harness connector terminal No. 6 (Violet/Green wire) and negative voltmeter lead to terminal No. 3 (Brown/White wire). Apply positive battery voltage to window motor harness connector terminal No. 4 (Red/Green wire) and connect negative battery lead to terminal No. 5 (Green wire). See Figure. Pulse should be generated with window motor running. Reverse polarity of battery leads. Pulse should be generated with window motor running in opposite direction. If generated pulse is not as specified, replace window motor assembly.

Factory Service Tools

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When to See a Mechanic

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

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

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