2002 ISUZU AXIOM air conditioning

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Page 29 of 2100

ISUZU AXIOM 2002 Service Repair Manual HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
1A±3
Service Precaution
WARNING: THIS VEHICLE HAS A SUPPLEMENTAL
RESTRAINT SYSTEM (SRS). REFER TO THE SRS
COMPONENT AND WIRING LOCATION VIEW IN
ORDER

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
1A±3
Service Precaution
WARNING: THIS VEHICLE HAS A SUPPLEMENTAL
RESTRAINT SYSTEM (SRS). REFER TO THE SRS
COMPONENT AND WIRING LOCATION VIEW IN
ORDER TO DETERMINE WHETHER YOU ARE
PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING. WHEN YOU
ARE PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING, REFER TO
THE SRS SERVICE INFORMATION. FAILURE TO
FOLLOW WARNINGS COULD RESULT IN POSSIBLE
AIR BAG DEPLOYMENT, PERSONAL INJURY, OR
OTHERWISE UNNEEDED SRS SYSTEM REPAIRS.CAUTION: Always use the correct fastener in the
proper location. When you replace a fastener, use
ONLY the exact part number for that application.
ISUZU will call out those fasteners that require a
replacement after removal. ISUZU will also call out
the fasteners that require thread lockers or thread
sealant. UNLESS OTHERWISE SPECIFIED, do not
use supplemental coatings (Paints, greases, or other
corrosion inhibitors) on threaded fasteners or
fastener joint interfaces. Generally, such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fastener. When
you install fasteners, use the correct tightening
sequence and specifications. Following these
instructions can help you avoid damage to parts and
systems.
Heating and Ventilation System
General Description
Heater
When the engine is warming up, the warmed engine
coolant is sent into the heater core. The heater system
supplies warm air into the passenger compartment to
warm it up.
Outside air is circulated through the heater core of the
heater unit and then into the passenger compartment. By
controlling the mixture of outside air and heater core air,
the most comfortable passenger compartment
temperature can be selected and maintained.
The temperature of warm air sent to the passenger
compartment is controlled by the temperature control
knob. This knob acts to open and close the air mix door,
thus controlling the amount of air passed through the
heater core.The air selector switch (Mode SW), with its different
modes, also allows you to select and maintain the most
comfortable passenger compartment temperature.
The air source select switch is used to select either
ªFRESHº for the introduction of the outside air, or ªCIRCº
for the circulation of the inside air. When the switch is set
to ªFRESHº, the outside air is always taken into the
passenger compartment. When setting the switch to
ªCIRCº position, the circulation of air is restricted only to
the inside air with no introduction of the outside air and the
air in the passenger compartment gets warm quickly.
However, the switch is normally set to ªFRESHº to
prevent the windshield from clouding.