Cooling Fan: Description
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].
COOLING FAN MOTOR
The cooling fan operates at each speed when the current flows in the cooling fan motor as per the following.
| Cooling fan speed | Cooling fan motor terminals | |
|---|---|---|
| (+) | (--) | |
| Middle (MID) | 1 | 3 and 4 |
| 2 | 3 and 4 | |
| 1 and 2 | 3 | |
| 1 and 2 | 4 | |
| High (HI) | 1 and 2 | 3 and 4 |
The cooling fan operates at low (LOW) speed when cooling fan motors-1 and -2 are circuited in series under the middle speed condition.
Refer to "SYSTEM DIAGRAM ".