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.
2001 Lexus LS 430FACTORY OEM SERVICE PROCEDURE
Bench Testing: Rotor
- Check rotor for open field windings by measuring resistance across slip rings. Resistance should be within specifications. See ROTOR RESISTANCE SPECIFICATIONS table. Check rotor for short circuit to ground by connecting ohmmeter between one slip ring and rotor. Continuity should not exist. If resistance and continuity are not as specified, replace rotor.
- Check slip rings for wear or damage. Turn rotor/slip rings on lathe if necessary. Ensure slip ring diameter is not less than .504" (12.8 mm). Check bearing and replace if necessary.
ROTOR RESISTANCE SPECIFICATIONS
| Application | (1) Ohms | ||
|---|---|---|---|
| ES300, IS300 & RX300 | 2.1-2.5 | ||
| GS300 & GS430 | 2.2-2.4 | ||
| LS430 | 2.3-2.7 | ||
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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.
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