ACTIVE AIR SHUTTER
id099000002600
Purpose of Adoption
• The active air shutter (front opening area) opens and closes in accordance with the environment and driving conditions resulting in improved fuel economy. By closing the opening and shutting off airflow, the vehicle air resistance is reduced, improving the fuel economy. If cooling is required, the active air shutter opens to allow airflow.
Service Point
• If the shutter becomes stuck, DTC P05A0 is stored. The conditions are as follows:
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― If the PCM receives a malfunction signal for a continuous 5 seconds from the active air shutter, it determines a temporary malfunction.
― At the point when the signal is received continuously for 2 drive cycles, a DTC is stored
― However, when the ambient temperature is 5 °C or more
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Note
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• Even if foreign matter is stuck in the shutter with the shutter stuck in a position close to open, DTC P05A0 is stored. If DTC P05A0 has been stored, first verify if there is foreign matter stuck in the shutter.
• The frame, actuator, shutter and link of the active air shutter cannot be disassembled, however, the cover can be replaced.
Common Inquiry
• If the calibration drive has been completed, the shutter may operate depending on the water temperature or change in A/C refrigerant pressure, even if the vehicle is not moving, because the system transfers to the normal control mode.
• After switching the ignition off and LIN communication is halted, and a maximum of 11 seconds (10 seconds +1.0/-0 seconds) have elapsed, the shutter opens automatically by the actuator fail-safe function.
Other
• The following can be considered as reasons for the shutter failing to move.
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1. Foreign matter stuck-->Active air shutter detects a malfunction and DTC P05A0 is stored.
2. Freezing-->Grille shutter detects malfunction and sends a signal to the PCM, however, due to the adverse effect on vehicle performance, conditions for storing DTC P05A0 (refer to applicable servicing pointers) are established to prevent a DTC from being stored every drive cycle.
3. Shutter shaft damage-->If the shaft is damaged due to chipping, the shutter does not open and close, however, because the actuator itself operates normally, the grille shutter does not detect a malfunction. As for countermeasures, a fail-safe structure is incorporated on the hard side of the active air shutter.
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Note
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• Because the fail-safe structure is designed such that the flaps move in the open direction under their own weight, they will all open automatically at a vehicle speed of 20 to 30 km/h even if the shutter shaft is damaged and sticking/free spin is not detected.
4. Sand/dust trapped in the bearing area-->If the trapped amount overcomes the motor drive torque of the actuator, the shutter will not open/close. Because the actuator itself cannot move, sticking is detected (DTC P05A0 is stored).
5. If (3) and (4) have occurred and a malfunction goes undetected, and the vehicle is driven under high engine load/high engine speed conditions with the shutter remaining closed, the PCM applies engine output control as a vehicle protection function.
