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.
2004 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE
Section 118 (Engine Controls - System & Component Testing)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 Nissan Xterra, 2003 Nissan Sentra, 2003 Nissan Pathfinder, 2003 Nissan Murano, and 2003 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
- Introduction
- Air Induction Systems
- Computerized Engine Controls
- Notes
- Engine Control Module
- Power & Ground Circuits (Altima 2.5L)
- Power & Ground Circuits (Altima 3.5L)
- Power & Ground Circuits (Frontier 2.4L & Xterra 2.4L)
- Power & Ground Circuits (Frontier 3.3L & Xterra 3.3L)
- Power & Ground Circuits (Maxima)
- Power & Ground Circuits (Murano)
- Power & Ground Circuits (Pathfinder)
- Power & Ground Circuits (Sentra 1.8L)
- Power & Ground Circuits (Sentra 2.5L)
- Power & Ground Circuits (350Z)
- Emission Systems & Sub-Systems
- Engine Sensors & Switches
- Notes
- Accelerator Pedal Position Sensor
- A/C High Pressure Switch
- Air/Fuel Ratio Sensor (SENTRA 1.8L SULEV Only)
- Automatic Speed Control Indicator
- Brake Switch
- Camshaft Position Sensor
- Crankshaft Position Sensor
- EGR Temperature Sensor
- Engine Coolant Temperature Sensor
- Front Heated Oxygen Sensor
- Fuel Level Sensor
- Fuel Tank Temperature Sensor
- Ignition Switch (Start Signal)
- Intake Air Temperature Sensor
- Knock Sensor
- Mass Airflow Sensor
- Power Steering Pressure Switch
- Power Steering Pressure Switch System Test
- Rear Heated Oxygen Sensor
- Refrigerant Pressure Sensor
- Throttle Position Sensor
- Vehicle Speed Sensor
- Fuel System
- Notes
- Fuel Delivery
- Relieving Fuel Pressure
- Fuel Pressure
- Fuel Pressure Regulator
- Fuel Pump
- Fuel Pump Relay
- Fuel System Condenser
- Fuel Pump Control System (Altima 2.5L)
- Fuel Pump Control System (Altima 3.5L)
- Fuel Pump Control System (Frontier & Xterra 2.4L)
- Fuel Pump Control System (Frontier & Xterra 3.3L)
- Fuel Pump Control System (Maxima)
- Fuel Pump Control System (Murano)
- Fuel Pump Control System (Pathfinder)
- Fuel Pump Control System (Sentra 1.8L)
- Fuel Pump Control System (Sentra 2.5L)
- Fuel Pump Control System (350Z)
- Fuel Control
- Fuel Injector
- Fuel Injector Circuits (Altima 2.5L & Sentra 2.5L)
- Fuel Injector Circuits (Altima 3.5L)
- Fuel Injector Circuits (Frontier & Xterra)
- Fuel Injector Circuits (Maxima)
- Fuel Injector Circuits (Murano)
- Fuel Injector Circuits (Pathfinder)
- Fuel Injector Circuits (Sentra 1.8L)
- Fuel Injector Circuits (350Z)
- Idle Control System
- Ignition System
- Miscellaneous Controls
- Relays & Solenoids
- Component Locations
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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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