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.
Fuel Pump Control System
- Unplug fuel pump relay. See Fig 1 . Turn ignition on. Check for battery voltage between ground and fuel pump relay connector terminals No. 1 (White wire) and terminal No. 3 (Black/White wire).
- If battery voltage is present, go to next step. If battery voltage is not present, check wiring connectors, 15-amp fuse No. 29 and No. 33 in fuse box.
- Turn ignition off. Disconnect fuel pump. Disconnect dropping resistor harness connector, located in luggage compartment. See Fig 2
. Check continuity as follows: See Fig 3
.
- Between dropping resistor harness connector terminal No. 1 (Green/Red wire) and fuel pump harness connector terminal No. 3. (Green/Red wire).
- Between fuel pump harness connector terminal No. 1 (Black/Yellow wire) and fuel pump relay harness connector terminal No. 5 (Black/Yellow wire).
- Between ground and dropping resistor harness connector terminal No. 2 (Black wire).
If continuity exists, go to next step. If continuity does not exists, repair fault in circuit.
- Leave ignition off. Disconnect ECM harness connector. Check continuity between fuel pump relay terminal No. 2 (Black/Pink wire) and ECM harness connector terminal No. 11 (Black/Pink wire). If continuity does not exists, repair fault in circuit. If continuity exists, check fuel pump. If fuel pump is okay, test fuel pump relay. See RELAYS under RELAYS & SOLENOIDS.
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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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