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.
1999 Infiniti Q45 BaseFACTORY OEM SERVICE PROCEDURE
Automatic Transmission Shift Interlock System
- Description
- Operation
- Symptom Tests
- ALTIMA, Pathfinder & QX4
- Frontier, G20, I30, Maxima, SENTRA & Quest
- Q45
- Notes
- Selector Lever Cannot Be Moved From Park Position With Key In & With Brake Pedal Applied Or, Selector Lever Can Be Moved From Park Position When Key Is Removed From Key Cylinder
- Key Cannot Be Removed From Ignition Switch With Shift Lever In Park Position Or Key Can Be Removed From Ignition Switch With Shift Lever In Any Position Other Than Park
- Component Tests
- Removal & Installation
- Wiring Diagrams
Factory Service Tools
Use the Manual With the Right Hardware
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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.