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.
1995 Infiniti J30FACTORY OEM SERVICE PROCEDURE
Fuel Pump Control System Wiring
- Unplug fuel pump relay. Turn ignition on. Check for battery voltage at fuel pump relay connector terminals No. 2 (Red/Green wire) and No. 3 (Light Green wire).
- If battery voltage is present at terminals No. 2 and 3, go to next step. If battery voltage is not present, check wiring connectors, 7.5-amp fuse in interior fuse box and 15-amp fuse in relay block.
- Disconnect fuel pump harness connector. Check continuity of Yellow/Black wire between fuel pump relay and fuel pump. Check continuity of Black/Red wire between fuel pump relay and ECM connector terminal No. 18. See Fig 1 .
- Repair wiring as necessary. If no faults are found in wiring, test fuel pump relay. See RELAYS under RELAYS & SOLENOIDS. Also test fuel pump and inspect ECM connector pin terminals.
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.