2003 Infiniti Q45FACTORY OEM SERVICE PROCEDURE

DISTRIBUTORLESS Ignition System: Spark

Remove each ignition coil, leaving harness connected. Connect a known good spark plug to ignition coil. Place end of Spark plug against a suitable ground. Crank engine and check for spark. If spark does not exist, check ignition coil, power transistor and circuits.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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