Service Precaution; Heating And Ventilation System; General Description - Isuzu 1999 RODEO Workshop Manual

1A-2 HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Evaporator Assembly . . . . . . . . . . . . . . . . . . . .
Evaporator Assembly and Associated
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronic Thermostat, Evaporator Core
and/or Expansion Valve
Disassembled View . . . . . . . . . . . . . . . . . . . .
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Line . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigerant Line and Associated Parts
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Data And Specifications
Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Precaution . . . . . . . . . . . . . . . . . . . .
General Description . . . . . . . . . . . . . . . . . . . . .

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.

General Description

Heater
When the engine is warming up, the warmed engine
coolant is sent out 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 back into the passenger
compartment. By controlling the mixture of outside air and
heater core air, the most comfortable passenger
compartment temperature
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.
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Heating and Ventilation System

can be selected
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Magnetic Clutch Assembly (DKV-14D Type)
Parts Location View
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compressor Oil
Oil Specification
Handling of Oil
Compressor Oil Check
Checking and Adjusting Oil Quantity
for Used Compressor
Checking and Adjusting for Compressor
Replacement
Contamination of Compressor Oil
Oil Return Operation
Replacement of Component Parts
Main Data and Specifications
Special Tools . . . . . . . . . . . . . . . . . . . . . . . . . . .
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.
The air selector knob, with its different modes, also allows
you to select and maintain the most comfortable
passenger compartment temperature.
The air source select lever is used to select either
"FRESH" for the introduction of the outside air, or "CIRC"
for the circulation of the inside air. When the lever is set to
"FRESH", the outside air is always taken into the
passenger compartment.
and "CIRC" 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 lever is normally set to "FRESH" to prevent
the windshield from clouding.
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When setting the lever to
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