AUTOMATIC AIR CONDITIONING SYSTEM: 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.

• "AUTOMATIC AIR CONDITIONING SYSTEM: AIR FLOW CONTROL "
• "AUTOMATIC AIR CONDITIONING SYSTEM: AIR INLET CONTROL "
• "AUTOMATIC AIR CONDITIONING SYSTEM: AIR INLET CONTROL "
• "AUTOMATIC AIR CONDITIONING SYSTEM: AIR OUTLET CONTROL "
• "AUTOMATIC AIR CONDITIONING SYSTEM: COMPRESSOR CONTROL "
• "AUTOMATIC AIR CONDITIONING SYSTEM: DOOR CONTROL "
• "AUTOMATIC AIR CONDITIONING SYSTEM: TEMPERATURE CONTROL "
• "AUTOMATIC AIR CONDITIONING SYSTEM: 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

  Refer to "COOLING FAN CONTROL: SYSTEM DESCRIPTION " (VQ37VHR) or "COOLING FAN CONTROL: SYSTEM DESCRIPTION " (VK56VD).

• Air conditioning cut control

  Refer to "AIR CONDITIONING CUT CONTROL: SYSTEM DESCRIPTION " (VQ37VHR) or "AIR CONDITIONING CUT CONTROL: SYSTEM DESCRIPTION " (VK56VD).

Control by IPDM E/R

• Relay control

  Refer to "RELAY CONTROL SYSTEM: SYSTEM DESCRIPTION ".

• Cooling fan control

  Refer to "POWER CONTROL SYSTEM: SYSTEM DESCRIPTION ".

Control by BCM

• Intelligent key interlock function.

  Refer to "INTELLIGENT KEY SYSTEM: 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.