Hyundai Genesis: Cooling System / Cooling Fan Description and Operation
The cooling fan controlsx the cooling fan motor voltage depending on the duty output from the ECU (Freq.: 300Hz).
[Signal from the ECU to the PWM (SI: 300Hz)]

SI Duty
| Motor Voltage (V)
| Variation (V)
|
10%
| 0
| ±0.5
|
30%
| 4.1
|
60%
| 8.2
|
70%
| 9.57
|
90%
| more than 12.5
| -
|
[Operating condition of the cooling fan]
A/C switch
| A/C pressure [kgf/cm? G (psi G)]
| Vehicle speed [km/h (mph)]
| Water Temperature [°C (°F)]
| Duty (%)
|
OFF
| ?
| V < 45 (28)
| 98 (208.4) or above
| 35 or above
|
45 (28) ? V < 80 (49.7)
| 101 (213.8) or above
| 40 or above
|
80 (49.7) ? V
| 105 (221) or above
| 80 or above
|
ON
| A/C pressure < 6 (85.3)
| All
| 105 (221) or above
| 90 or above
|
6 (85.3) ? A/C pressure < 12 (170.7)
| V < 45 (28)
| 82 (179.6) or above
| 30 or above
|
45 (28) ? V < 80 (49.7)
| 96 (204.8) or above
| 40 or above
|
80 (49.7) ? V
| 96 (204.8) or above
| 60 or above
|
12 (170.7) ? A/C pressure < 15.5 (120.5)
| V < 45 (28)
| 101 (213.8) or above
| 70 or above
|
45 (28) ? V < 80 (49.7)
| - 30 (- 22) or above
| 40 or above
|
80 (49.7) ? V
| 82 (179.6) or above
| 60 or above
|
15.5 (120.5) ? A/C Pressure
| V = 0
| - 30 (- 22) or above
| 70 or above
|
0 < V
| - 30 (- 22) or above
| 90 or above
|
Components
1. Cooling fan shroud2. Cooing fan3. Cooling fan motor4. Cooling far rear cover5. Cooling fan controller (PWM)6. Reservoir tank
...
Specifications
[Cooling fan control (PWM)]
ItemsPerformance specMAX, load current consumption (12V)23.3 + 10% AInputCommunication frequency300 ± 5%Duty10, 30 ~ 90 % Voltage levelHImore than 0.7 V ...
Other information:
Removal
1.
Remove the filler neck mounting screws (A) after opening the fuel filler door.
2.
Remove the rear-left wheel & tire and wheel house cover.
3.
Disconnect the fuel filler hose (A) and leveling hose (B).
4.
Disconnect the vent hose quick-connector (C).
5.
Remove the ...
Replacement
•
Put on gloves to prevent hand injuries.
•
When removing with a flat-tip screwdriver or remover, wrap protective tape around the tools to prevent damage to components.
•
When removing the interior trim pieces, use a p ...