DESCRIPTION
Each radiator fan is made of plastic. It is driven by an electric motor, which is retained on a shroud.
Scheme 1
To reduce fan noise, the fan output is two-stepped and can be switched to Low or High according to the load on A/C, coolant temperature, and vehicle speed. This control is accomplished by a circuit as shown below; the output is changed by switching the connection of two motors between serial and parallel instead of using components such as resistors.
Scheme 2
On models equipped with an air conditioning system, the ECM receives signals from the engine coolant temperature sensor, vehicle speed sensor and A/C switch, and based on these signals, the ECU controls the fan speed to Hi or Low.
Note. Refer to the Service Manual for operation of each model.
| Vehicle speed | A/C compressor load | Engine coolant temperature | ||
|---|---|---|---|---|
| Rising: below 95°C (203°F) Lowering: below 92°C (198°F) | Rising: between 96 and 99°C (205 and 210°F) Lowering: between 93 and 94°C (199 and 201°F) | Rising: over 100°C (212°F) Lowering: over 95°C (203°F) | ||
| Operation of radiator fans | Operation of radiator fans | Operation of radiator fans | ||
| When accelerating: below 19 km/h (12 MPH) When decelerating: below 10 km/h (6 MPH) | OFF | OFF | Low-Speed | High-Speed |
| Low | Low-Speed | Low-Speed | High-Speed | |
| High | High-Speed | High-Speed | High-Speed | |
| When accelerating: between 20 and 69 km/h (12 and 43 MPH) When decelerating: between 11 and 64 km/h (7 and 40 MPH) | OFF | OFF | Low-Speed | High-Speed |
| Low | High-Speed | High-Speed | High-Speed | |
| High | High-Speed | High-Speed | High-Speed | |
| When accelerating: between 70 and 105 km/h (43 and 65 MPH) When decelerating: between 65 and 103 km/h (40 and 64 MPH) | OFF | OFF | Low-Speed | High-Speed |
| Low | OFF | Low-Speed | High-Speed | |
| High | Low-Speed | High-Speed | High-Speed | |
| When accelerating: over 106 km/h (66 MPH) When decelerating: over 104 km/h (64.6 MPH) | OFF | OFF | OFF | High-Speed |
| Low | OFF | Low-Speed | High-Speed | |
| High | OFF | Low-Speed | High-Speed | |
OPERATION EXAMPLES CHART