Cooling Fan Control
SYSTEM DESCRIPTION
| Sensor | Input Signal to ECM | ECM function | Actuator | ||||
|---|---|---|---|---|---|---|---|
| Crankshaft position sensor (POS) Camshaft position sensor (PHASE) |
Engine speed(1) | Cooling fan control | Cooling fan relay(s) | ||||
| Vehicle speed sensor(2) | Vehicle speed | ||||||
| Engine coolant temperature sensor | Engine coolant temperature | ||||||
| Air conditioner switch | Air conditioner ON signal | ||||||
| Battery | Battery voltage(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 3-step control [HIGH/LOW/OFF].