System Description

AUTOMATIC AIR CONDITIONING SYSTEM (WITH FOREST AIR) : System Description

- Automatic air conditioning system is controlled by each function of A/C auto amp., ECM, IPDM E/R and
BCM.

Control by A/C auto amp.
- Air Flow Control
- Air Inlet Control
- Air Inlet Control
- Air Outlet Control
- Compressor Control
- Door Control
- Temperature Control
- Intelligent Key Interlock Function
- Correction for input value of each sensor

Ambient sensor (setting temperature correction)
- A/C auto amp. controls passenger room temperature so that the optimum level always matches the temperature level that passenger may feel. Correction is applied to the target temperature that is set using temperature control dial, according to ambient temperature detected by ambient sensor.

In-vehicle sensor (setting temperature correction)
- Passenger room temperature from in-vehicle sensor is corrected for each air conditioning control (driver side and passenger side)

Intake sensor (intake temperature correction)
- A/C auto amp. performs correction to change recognition intake temperature of A/C auto amp. more quickly when difference is larger between recognition intake temperature and intake temperature from intake temperature sensor. The correction is performed to change recognition intake temperature more slowly when difference is smaller.

Sunload sensor (sunload amount correction)
- Sunload amount from sunload sensor is corrected for each air conditioning control (driver side and passenger side).
- A/C auto amp. performs correction to change recognition sunload amount of A/C auto amp. slowly when sunload amount changes excessively, for example when entering or exiting a tunnel.

Control by ECM
- Cooling fan control
System Description (VQ37VHR) or System Diagram System Description, "COOLING FAN
CONTROL : System Description" (VK56VD).
- Air conditioning cut control
System Description (VQ37VHR) or System Diagram System Description, "AIR
CONDITIONING CUT CONTROL : System Description" (VK56VD).

Control by IPDM E/R
- Relay control
System Description.
- Cooling fan control
System Description.

Control by BCM
- Intelligent key interlock function. System Description.
- Various operations of air conditioning system are transmitted from multifunction switch and display to AV control unit via communication line (except display) and from AV control unit to A/C auto amp. via CAN communication. A/C auto amp. sends each indication information to AV control unit via CAN communication. AV control unit displays each type of indication information that is received.