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.
2007 Nissan-Datsun Altima BaseFACTORY OEM SERVICE PROCEDURE
Input/Output Signal Chart
INPUT/OUTPUT SIGNAL CHART
| Sensor | Input signal to ECM | ECM function | Actuator | ||||
|---|---|---|---|---|---|---|---|
| Crankshaft position sensor (POS) Camshaft position sensor (PHASE) |
Engine speed(1) | Cooling fan control | IPDM E/R ↓ Cooling fan relay ↓ Cooling fan motor |
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| Battery | Battery voltage(1) | ||||||
| Wheel sensor | Vehicle speed(2) | ||||||
| Engine coolant temperature sensor | Engine coolant temperature | ||||||
| Air conditioner switch | Air conditioner ON signal(2) | ||||||
| Refrigerant pressure sensor | Refrigerant pressure | ||||||
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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.