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 Test
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.
NOTE:
Test for 1.4 and 2 kilowatt field coil type starters only.
- Using an ohmmeter, verify that there is continuity between the lead wire and field coil brush lead. If there is no continuity, replace the field frame. See Fig 1.
- Using an ohmmeter, verify that there is no continuity between the field coil end and field frame. If continuity is present, replace the field frame. See Fig 1.
- Using an ohmmeter, measure the resistance between shunt coil terminals "A" and "B". See Fig 2. Verify coil resistance is within specification. See STARTER SPECIFICATIONS . If the resistance is not as specified, replace the starter yoke 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:
- • 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.