Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2003 Lexus LS 430FACTORY OEM SERVICE PROCEDURE
Jam Protection Pulse 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.
- Inspect the jam protection pulse switch operation.
- Connect the positive (+) lead from the TOYOTA electrical tester to terminal No. 3 and the negative (-) lead to terminal No. 5. See CONNECTOR IDENTIFICATION .
- On the rear left door, connect the positive (+) lead from the battery to terminal No. 2 and the negative (-) lead to terminal No. 1.
- On the rear right door, connect the positive (+) lead from the battery to terminal No. 1 and the negative (-) lead to terminal No. 2.
- Check that a pulse is generated while the motor is running.
- Reverse the polarity and check that a pulse is generated.
- If a pulse is not generated, replace the motor. See REAR DOOR POWER WINDOW REGULATOR under COMPONENT TESTS.
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:
- • 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.