Suzuki XL7 2007 Service Manual page 1815

Heating, Ventilation and Air Conditioning
Air Delivery Description and Operation
The air delivery description and operation is divided into
4 areas:
• HVAC control components
• Air speed
• Auxiliary air speed
• Air delivery
• Auxiliary air delivery
• Recirculation operation
HVAC Control Components
HVAC Control Module
The HVAC control module is a non-class 2 device that
interfaces between the operator and the HVAC system
to maintain air temperature and distribution settings. The
battery positive and ignition 1 voltage circuits provide
power to the control module. The control module
supports the following features:
Feature
After Blow
Purge
Personalization
Actuator Calibration
Auxiliary HVAC Control Module (part of rear seat
audio controls)
The auxiliary HVAC control module is located as an
integral part of the rear seat audio controls located in the
rear center console. The system can be controlled from
both the front and rear controls. To activate the rear hvac
system press the AUX button on the front climate
controls, an indicator will be lit. Pressing the AUX button
once will set the rear hvac into mimic mode. In this mode
the airflow in the rear will be approximately the same
direction, temperature, and fan speed as the front.
Pressing the front climate control AUX button again will
turn the rear system and the indicator off. If the rear
controls are adjusted, the rear control will enter a rear
independent state. Airflow in the rear will then be
according to the settings of the rear hvac controls. The
rear system can be turned off by pressing the AUX
button on the front HVAC climate control and the status
light will turn off. If the front AUX button is off then the
rear climate control system is off. A GM LAN device that
interfaces between the rear seat occupants and the
auxiliary HVAC system to maintain auxiliary air
temperature and auxiliary air distribution settings. The
battery positive voltage circuit provides power that the
control module uses for keep alive memory (KAM). If the
battery positive voltage circuit loses power, all auxiliary
HVAC DTCs and settings will be erased from KAM. The
auxiliary HVAC control module will perform a
recalibration of the electric actuators when commanded
General Description
Availability
Yes
Yes
Yes
Yes
Heating, Ventilation and Air Conditioning:
with a scan tool or if KAM is lost. This will ensure the
actuators are moving with in the calibrated range. During
this calibration process the auxiliary blower motor will be
disabled for up to 3 minutes. With this hvac control head
a automatic operation can be achieved by pressing the
plus or minus temperature buttons to increase or
decrease cabin temperature. The temp display on the
rear hvac head will display the temp setting increasing or
decreasing. These climate control functions will only
display in rear independent mode when the rear controls
are being used. Manual controls of the rear climate
control consist of: Fan to decrease or increase fan
speed. The up arrow fan control will turn on the rear
hvac control in manual mode. The down arrow fan
control will turn off the rear hvac manual mode. The
increase and decrease temperature buttons adjust the
rear flow of air temperature to the rear occupants. The
mode button will manually change the direction of air
flow in your vehicle. Mutiple presses will cycle through
the rear air delivery selections until the desired mode of
choice is displayed.
Auxiliary HVAC Control Module (three knobs located
in rear headliner)
This type of rear climate control consists of three knobs
located in the rear headliner. This rear control system
can be controlled form both the front and rear hvac. To
turn on this rear system, press the front HVAC controls
AUX button, an indicator on the AUX button will be lit. To
activate the rear hvac system press the AUX button on
the front climate controls, an indicator will be lit. Pressing
the AUX button once will set the rear hvac into mimic
mode. In this mode the airflow in the rear will be
approximately the same direction, temperature, and fan
speed as the front. Pressing the front climate control
AUX button again will turn the rear system and the
indicator off. If the rear controls are adjusted, the rear
control will enter a rear independent state. Airflow in the
rear will then be according to the settings of the rear
hvac controls. The rear system can be turned off by
pressing the AUX button on the front HVAC climate
control and the status light will turn off. If the front AUX
button is off then the rear climate control system is off.
The three rear control knobs starting from the left, fan
control turning clockwise or counter clockwise. Turning
the fan control knob all the way counter clockwise turns
the rear climate control off. Center knob controls the rear
temperature of the air flowing through the rear
passenger compartment. A clockwise turn into the red
dial area produces warmer air, a counter clockwise turn
into the blue dial area produces cooler air temperatures.
The right knob controls air delivery with choices of VENT
air directed through headliner outlets. Bi-Level air is
delivered through the floor outlets as well as the
7A-1