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.
Input/Output Signal Chart
2009 Nissan-Datsun Xterra SE, 4WDSECTION Input/Output Signal Chart
INPUT/OUTPUT SIGNAL CHART
| Sensor | Input Signal to ECM | ECM function | Actuator | ||||
|---|---|---|---|---|---|---|---|
| Crankshaft position sensor (POS) | Engine speed(1) Piston position |
Ignition timing control | Power transistor | ||||
| Camshaft position sensor (PHASE) | |||||||
| Mass air flow sensor | Amount of intake air | ||||||
| Engine coolant temperature sensor | Engine coolant temperature | ||||||
| Throttle position sensor | Throttle position | ||||||
| Accelerator pedal position sensor | Accelerator pedal position | ||||||
| Knock sensor | Engine knocking | ||||||
| Park/neutral position (PNP) switch | Gear position | ||||||
| Battery | Battery voltage(1) | ||||||
| Wheel sensor | Vehicle speed(2) | ||||||
|
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RENDER: 1.0x
NO RELATED
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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.