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
To test fuel pump, disconnect fuel pump connector, accessible through trunk (Maxima and 240SX), under rear seat (Altima, Sentra and 200SX), or under vehicle body (Pathfinder, QX4, Frontier and Quest). At fuel pump connector, check resistance between fuel pump terminals specified in FUEL PUMP RESISTANCE TEST table. If resistance is not as specified, replace fuel pump.
| Application | Terminals (Wire Colors) | Ohms |
|---|---|---|
| Altima | Black & Black/Red | 0.2-5.0 |
| Maxima | Black/Yellow & Green/Red | 0.2-5.0 |
| Sentra & 200SX | Black & Black/Yellow | 0.2-5.0 |
| Pathfinder & QX4 | Black & White/Blue | 0.2-5.0 |
| Frontier | Black & White/Blue | 0.2-5.0 |
| Quest | Black/White & Light Green/Red | 0.7 |
| 240SX | Black & Black/Yellow | 0.2-5.0 |
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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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