2000 Infiniti Q45 BaseFACTORY OEM SERVICE PROCEDURE

Key Switch

Disconnect key switch 4-pin connector. Check continuity between terminals No. 3 and 4. See Fig 1 . Continuity should be present only with key in ignition lock cylinder. If continuity is as specified, switch is okay. If continuity is not as specified, replace switch.

Fig 1: Testing Key Switch
G00012493Courtesy of NISSAN MOTOR CO., USA
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:

  • 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.