Cooling Fan Control
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) | ||
| 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 4-step control [HIGH/MIDDLE/LOW/OFF].