2001 Lexus LX 470FACTORY OEM SERVICE PROCEDURE

Pulse Switch (Jam Protection) Test

  1. Slightly lower window glass for window being tested. Disconnect 5-pin connector from power window motor. Using Toyota electrical tester, check for a pulse signal generated between power window motor connector terminals No. 3 and 5. See Figure. Connect jumper wire from positive terminal of 12-volt battery to power window motor connector terminal No. 1.
  2. Connect another jumper wire from negative terminal of battery to power window motor connector terminal No. 4. Ensure pulse signal exists while window raises to fully closed position. Reverse polarity and ensure pulse signal exists while window lowers to fully opened position. If pulse signal exists in both directions, pulse switch is okay at this time. If pulse signal does not exist in one or both directions, replace power window motor.
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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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