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.
1997 Lexus LX 450FACTORY OEM SERVICE PROCEDURE
Fuel Pump Relay
- Ensure ignition is off. Remove fuel pump relay. Fuel pump relay is bolted to fender on driver's side of engine compartment, just above fenderwell and contains a Black 4-pin electrical connector.NOTE: Fuel pump relay may be identified using appropriate illustration in THEORY/OPERATION article.
- To check fuel pump relay continuity, use ohmmeter to check continuity between specified terminals. See Fig 1.
- To test fuel pump relay operation, apply battery voltage and ground to specified terminals on fuel pump relay and use ohmmeter to check continuity between specified terminals. See Fig 1. Replace fuel pump relay if defective.
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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