Cooling Fan Control
ECM FUNCTION 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) | ||||
| 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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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 2-step control [HI/OFF].