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
Field Coil
WARNING: This page is about a different car, the 2004 Toyota 4Runner and 2003 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
- Check whether the pull-in coil has an open circuit. Using an ohmmeter, check that there is continuity between terminal No. 50 and terminal "C". See Fig 1. If there is no continuity, check and replace the magnetic switch.
- Check whether the pull-in coil has an open circuit. Using an ohmmeter, check that there is continuity between terminals No. 50 and the switch body. See Fig 1. If there is no continuity, check and replace the magnetic switch.
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.