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 SC 430FACTORY OEM SERVICE PROCEDURE
Load Test
NOTE:
If battery is fully charged, generator load test results may be less than 30 amps.
- Connect an ammeter as described in NO-LOAD TEST, step 1. Start engine. Turn on high beam headlights and place heater blower switch on HI. Increase engine speed to 2000 RPM.
- Check ammeter reading. See GENERATOR SPECIFICATIONS . If amperage is less than specified, repair or replace generator.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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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