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
Input/Output Signal Chart
WARNING: This page is about a different car, the 2005 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
INPUT/OUTPUT SIGNAL CHART
| Sensor | Input signal to ECM | ECM function | Actuator | ||||
|---|---|---|---|---|---|---|---|
| Air conditioner switch (1) | Air conditioner ON signal | Air conditioner cut control | Air conditioner relay | ||||
| Accelerator pedal position sensor | Accelerator pedal position | ||||||
| Crankshaft position sensor (POS) Camshaft position sensor (PHASE) |
Engine speed (2) | ||||||
| Engine coolant temperature sensor | Engine coolant temperature | ||||||
| Battery | Battery voltage (2) | ||||||
| Refrigerant pressure sensor | Refrigerant pressure | ||||||
| Power steering pressure sensor | Power steering operation | ||||||
| Wheel sensor (1) | Vehicle speed | ||||||
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Factory Service Tools
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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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