2003 Lexus LS 430FACTORY OEM SERVICE PROCEDURE

Jam Protection Limit Switch (Rear)

WARNING: This page is about a different car, the 2002 Lexus GS 430 and 2002 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: If connecting the wire harness wrongly, the sensor might be damaged so caution is necessary.
  1. Inspect the jam protection limit switch operation with the window up.
  2. Connect the positive (+) lead from the ohmmeter to terminal No. 2 and the negative (-) lead to terminal No. 6. See CONNECTOR IDENTIFICATION .
  3. Connect the positive (+) lead from the battery to terminal No. 3 and the negative (-) lead to terminal No. 1.
  4. Check that the continuity exists when the window goes up.
  5. Check that no continuity exists when the window is in the fully closed position.
  6. If the operation is not as specified, replace the motor. See REAR DOOR POWER WINDOW REGULATOR  under COMPONENT TESTS.
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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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