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
Back-Up Light Circuit
NOTE:
If LEXUS scan tool is available, start test from step 1. If this scan tool is not available, start test from step 2.
- Using scan tool, operate back-up lights in ACTIVE TEST. If back-up lights do not operate, go to next step. If back-up lights operate, go to next test listed in appropriate SYMPTOM DIAGNOSIS table under TROUBLE SHOOTING .
- Check back-up light bulbs. Replace bulbs as necessary. If bulbs are okay, check circuits for faults between back-up lights, body No. 4 ECU and battery. See WIRING DIAGRAMS . Repair or replace as necessary. If circuits are okay, go to next test listed in BODY NO. 2 CONTROL SYSTEM table under TROUBLE SHOOTING .
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.