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.
Ignition Coil
Ignition coil is located in distributor. Turn ignition off. Disconnect distributor 2-pin harness connector (ignition coil connector). Remove distributor cap. For primary coil, measure resistance between distributor 2-pin connector terminals (component side). For secondary coil, measure resistance between distributor 2-pin connector terminal No. 7 and coil tower. See Fig 1. See IGNITION COIL RESISTANCE table. Replace distributor assembly, if resistance is not as specified.
| Application | Primary | Secondary | |
|---|---|---|---|
| Altima | About 1 Ohm @ 68°F (20°C) | About 10 K/Ohms @ 68°F (20°C) | |
| Frontier & Xterra | |||
| 2.4L | Less Than 1 Ohm @ 77°F (25°C) | 7-13 K/Ohms @ 77°F (25°C) | |
| 3.3L | .5-1.0 Ohm @ 77°F (25°C) | About 12 K/Ohms @ 77°F (25°C) | |
| Quest | .5-1.0 Ohm @ 77°F (25°C) | About 12 K/Ohms @ 77°F (25°C) | |
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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.