Hvac Control Module Operation Description; Refrigerant Type Identification; Sub-Cool A/C System Description; A/C Operation Description - Suzuki Swift Sport 2004 Service & Repair Manual

7B-36 Air Conditioning System: Automatic Type
Auto A/C Electronic Control Input / Output Table
Data link connector
A/C refrigerant pressure sensor
ECT sensor
ECM
*
BCM
Outside air temperature sensor

HVAC Control Module Operation Description

Temperature Control
HVAC control module calculates the target temperature
control door position based on signals from the
temperature selector, inside air temperature sensor,
outside air temperature sensor and sunload sensor and
controls the temperature control actuator so that the
current position of the temperature control door matches
its target position.
Fan Speed Control
HVAC control module calculates the target blower fan
speed based on signals from the temperature selector,
inside air temperature sensor, outside air temperature
sensor and sunload sensor, compares it with the current
blower fan speed inputted from the blower motor
controller to control the current blower fan speed to the
target level.
Air Flow Outlet Control
HVAC control module calculates the target temperature
control door position based on signals from the
temperature selector, inside air temperature sensor,
outside air temperature sensor and sunload sensor.
Using thus obtained target temperature control door
position, it further calculates the target air flow control
door position and controls the air flow control actuator so
that the current air flow control door position becomes
the target position.
HVAC control module
VSS
Compressor
*: CAN communication
S7RS0B7221002
Temperature selector
MODE (air flow) selector
Blower speed selector
Air intake selector
A/C switch
AUTO switch
CPU
Temperature control actuator
Air flow control actuator
Air intake control actuator
Blower motor controller
Inside air temperature sensor
Sunload sensor
Evaporator temperature sensor
Air Intake Position Control
HVAC control module determines the position of the air
intake control door based on signals from the
temperature selector, inside air temperature sensor,
outside air temperature sensor and sunload sensor and
selects any of the following positions by controlling the
position of the air intake control door.
• FRESH position (FRE)
• RECIRCULATION position (REC)
• MIX position (MIX)

Refrigerant Type Identification

Refer to "Refrigerant Type Identification".

Sub-Cool A/C System Description

Refer to "Sub-Cool A/C System Description".

A/C Operation Description

Refer to "A/C Operation Description".
I5RS0C722002-02
S7RS0B7221003
S7RS0B7221005
S7RS0B7221006