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.
1994 Infiniti J30FACTORY OEM SERVICE PROCEDURE
Engine Controls - System/Component Tests
- Introduction
- Computerized Engine Controls
- Engine Sensors & Switches
- Notes
- Mass Airflow (MAF) Sensor
- Coolant Temperature Sensor
- Crankshaft Position Sensor
- Heated Oxygen Sensor (Ho2S)
- Heated Oxygen Sensor Heater
- EGR Temperature Sensor (CALIFORNIA)
- Fuel Temperature Sensor
- Inhibitor Switch
- Knock Sensor
- Power Steering Pressure Switch
- Start Signal
- Throttle Position Sensor (TPS) & Closed Throttle Position Switch
- Vehicle Speed Sensor
- Relays & Solenoids
- Fuel System
- Idle Control System
- Ignition System
- Emission Systems & Sub-Systems
- 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.