Cooling Fan Control
WARNING: This page is about a different car, the 2008 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
COOLING FAN CONTROL SPECIFICATION
| 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) |
||||
| Battery | Battery voltage(1) | ||||||
| Wheel sensor | Vehicle speed(1) | ||||||
| Engine coolant temperature sensor | Engine coolant temperature | ||||||
| Air conditioner switch | Air conditioner ON signal(1) | ||||||
| Refrigerant pressure sensor | Refrigerant pressure | ||||||
|
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The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refrigerant pressure, and air conditioner ON signal. The control system has 4-step control [HIGH/MIDDLE/LOW/OFF].
The ECM controls cooling fan relays through CAN communication line.