Intake Door Control System

INTAKE DOOR CONTROL SYSTEM

System Diagram






System Description
The intake doors are automatically controlled by the temperature setting, ambient temperature, in-vehicle temperature, intake temperature, amount of sunload and ON/OFF operation of the compressor.

SYSTEM OPERATION
The intake door control judges intake door position based on the ambient temperature, the intake air temperature and the in-vehicle temperature. When shifting mode position D/F, when the DEF or OFF switches are pressed, or when A/C switch is OFF, the unified meter and A/C amp. sets the intake door at the FRE position.

Door Motor Circuit









Intake Door Control Specification
Intake door position is basically fixed at FRE when FRE indicators of DEF switch and intake switch turn ON, and fixed at REC when REC indicator of intake switch turns ON.

Intake door automatic control selects FRE, 20 - 80% FRE, or REC depending on a target air mix door opening angle, based on in-vehicle temperature, ambient temperature, and sunload.