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.
2000 Lexus ES 300FACTORY OEM SERVICE PROCEDURE
Fuel Pump Operation (Using Lexus Scan Tool)
- Connect Lexus scan tool to Data Link Connector (DLC) No. 3. See Figure or Figure. Turn ignition on. Turn scan tool on. DO NOT start engine.
- Select ACTIVE TEST mode on scan tool. Using Lexus scan tool manufacturer's instructions, activate electric fuel pump. Fuel pump is operating if fuel pump operating sound can be heard or pulsations can be felt in fuel line near fuel rail.
- If fuel pump does not operate, check for faulty fusible link/fuses. See appropriate wiring diagram in WIRING DIAGRAMS article. Check for faulty circuit opening relay or EFI main relay in fuse/relay box at left front of engine compartment. Check for faulty fuel pump, ECM or poor wiring connections.
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.