Cooling Fan Control
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 | ||||||
|
|||||||
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.