Control Table
In the active air shutter control, the PCM controls the active air shutter actuator to open/close the shutter.
The controlled functions are as follows:
| Control | Function | Content |
| Basic control | 1. Basic function (See 1. Basic function.) |
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| 2. Shutter fully open/closed position learning function (See 2. Shutter fully open/closed position learning function.) |
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| Protection control | 1. Engine protection function |
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| 2. ATX protection function (See 2. ATX protection function.) |
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| 3. Throttle valve protection function |
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| Fail-safe (See Fail-safe.) |
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The shutter is fully open when the ignition is switched off.
The shutter is controlled in three positions; 0 ° (fully closed), 66 ° (66 ° open from fully closed position), and 90 ° (fully open).
NOTE:
With the shutter opened to the 66 ° position, more air flows to the radiator and condenser while driving than with the shutter fully open.
The PCM opens/closes the shutter in the following control sections.
The PCM fully closes the shutter when all the following conditions are met.
Vehicle speed: less than 140 km/h {87.0 mph}
Engine coolant temperature: less than 100 °C {212 °F}
Load condition due to A/C operation, vehicle speed during A/C operation, and refrigerant pressure are the specified values or less*
Protection control is not operating
*: In the following range during A/C operation, the shutter is opened to the 66 ° position to cool the condenser.
To learn the shutter fully open/closed positions, the PCM fully opens/closes the shutter when the vehicle speed reaches 10 km/h {6.2 mph} or more after the ignition was switched on.
NOTE:
When the ignition is switched off, the shutter fully open/closed positions recorded in the PCM are cleared.
If an error occurs during the shutter fully open/closed position learning and the learning is not completed, the PCM performs the learning again (to maximum 3 times).
If any of the following conditions is met, the PCM opens the shutter to the 66 ° position to protect the engine until the ignition is switched off.
Engine coolant temperature: 116 °C {241 °F} or more
Engine oil temperature control of drive-by-wire control is operating*
*: This function is synchronized with the engine oil temperature control of the drive-by-wire control. For details on the engine oil temperature control, refer to the DRIVE-BY-WIRE CONTROL. (See DRIVE-BY-WIRE CONTROL [SKYACTIV-G 2.5].) In addition, when this function operates, the PCM sends a master warning light on request to the instrument cluster. (See MASTER WARNING LIGHT.)
For ATX protection, when the PCM receives a cooling fan operation request signal from the TCM, the PCM opens the shutter to the 66 ° position until the ignition is switched off to prevent the ATF temperature from being excessively high, and also to lower the frequency of fail-safe operations which operate when the ATF temperature is high.
When the intake air temperature is -5 °C {23 °F} or less, the PCM opens the shutter to the 66 ° position to prevent the engine oil temperature from increasing rapidly.
By opening the shutter, a rapid increase in engine oil temperature is suppressed to prevent the blow-by gas from freezing and adhering to the throttle valve.
NOTE:
If the flow amount exceeds the allowable flow amount of the PCV valve, the blow-by gas flows inside the air hose via the ventilation hose.
The blow-by gas is cooled by the cool intake air and condenses to water, and the water freezes by being cooled furthermore. If this ice adheres to the throttle valve, it may affect the throttle valve operation. In addition, if the engine oil temperature increases rapidly, fluid in the engine oil in the crank case evaporates and mixes with the blow-by gas. To prevent this, the shutter is opened when the intake air temperature is low to suppress rapid increase in the engine oil temperature.
If any of the following DTCs is stored, the PCM opens the shutter to the 66 ° position.
Intake air temperature sensor No.1 malfunction (P0112:00, P0113:00)
Engine coolant temperature sensor malfunction (P0117:00, P0118:00)
Vehicle speed signal error (P0500:00)
Active air shutter malfunction (P059F:00, P05A0:00)