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 QX4FACTORY OEM SERVICE PROCEDURE
Engine Controls - System & Component Testing
- 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.
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