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.
2000 Infiniti Q45 BaseFACTORY OEM SERVICE PROCEDURE
Section 5 (Engine Controls - System & Component Testing)
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2000 Nissan Xterra, 2000 Nissan Sentra, 2000 Nissan Quest, 2000 Nissan Pathfinder, and 2000 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
- Introduction
- Computerized Engine Controls
- Engine Sensors & Switches
- Notes
- A/C High Pressure Switch (Quest)
- Camshaft Position (CMP) Sensor
- Crankshaft Position (CKP) Sensor
- EGR Temperature Sensor
- Engine Coolant Temperature (ECT) Sensor
- Front Heated Oxygen Sensor (Ho2S)
- Fuel Level Sensor
- Fuel Tank Temperature Sensor (FTTS)
- Ignition Switch (Start Signal)
- Intake Air Temperature (IAT) Sensor
- Knock Sensor (KS)
- Mass Airflow (MAF) Sensor
- Power Steering Pressure Switch
- Power Steering Pressure Switch System Test
- Rear Heated Oxygen Sensor (Ho2S)
- Refrigerant Pressure Sensor - Maxima & SENTRA
- Throttle Position (TP) Sensor
- Vehicle Speed Sensor (VSS)
- Relays & Solenoids
- Fuel System
- Idle Control System
- Ignition System
- Emission Systems & Sub-Systems
- Exhaust Gas RECIRCULATION (EGR)
- Fuel Evaporation (EVAP) Control System
- On Board Refueling Vapor Recovery (ORVR) System (ALTIMA, Maxima & SENTRA)
- Notes
- Refueling Control Valve Test (Altima)
- Refueling Control Valve Test (Maxima & Sentra)
- Refueling EVAP Vapor Cut Valve Test (Altima)
- Refueling EVAP Vapor Cut Valve Test (Maxima & Sentra)
- Refueling One-Way Fuel Valve Test (Altima, Maxima & Sentra)
- Strong Fuel Odor From EVAP Canister (Altima, Maxima & Sentra)
- Cannot Refuel/Strong Fuel Odor From Fuel Filler While Refueling (Altima & Maxima)
- Cannot Refuel/Strong Fuel Odor From Fuel Filler While Refueling (Sentra)
- Positive Crankcase Ventilation (PCV)
- Miscellaneous Controls
- Component Locations
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.