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HEATING & AIR CONDITIONING
DESCRIPTION
DESCRIPTION - SINGLE ZONE
DESCRIPTION - DUAL ZONE
DESCRIPTION - MANUAL THREE ZONE . . . . . 1
DESCRIPTION - THREE ZONE AUTOMATIC
TEMPERATURE CONTROL . . . . . . . . . . . . . . . 2
OPERATION
OPERATION - DUAL ZONE
OPERATION - MANUAL THREE ZONE
OPERATION - THREE ZONE ATC
DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - A/C COOL
DOWN TEST . . . . . . . . . . . . . . . . . . . . . . . . . . 5
HEATING & AIR
CONDITIONING
DESCRIPTION
DESCRIPTION - SINGLE ZONE
A single zone heating and air conditioning system
allows one temperature setting for the entire vehicle.
The full range of temperatures that the system can
produce are available by rotating the temperature
control located in control panel.
The control panel and integral computer is
mounted in the instrument panel.
DESCRIPTION - DUAL ZONE
A manual Dual Zone Heating and Air Conditioning
system allows completely independent side-to-side
tempeture control of the discharge air.
The Dual Zone Heating and Air Conditioning sys-
tem includes a dust and odor air filter. The filter ele-
ment is the same size as the air conditioning
evaporator to ensure ample capacity. A door at the
base of the heating and air conditioning housing
below the glove box provides easy access to the filter
element.
The control panel and integral computer is located
in the instrument panel.
The instrument panel mounted control and inte-
gral computer contains:
• a power button which allows the system to be
completely turned off. Contains an LED that illumi-
nates to show when the function is operational.
HEATING & AIR CONDITIONING
TABLE OF CONTENTS
page
. . . . . . . . . . . 1
. . . . . . . . . . . . . 1
. . . . . . . . . . . . . . . 3
. . . . . . 3
. . . . . . . . . . 4
HEATING & AIR CONDITIONING
DIAGNOSIS AND TESTING - A/C
PERFORMANCE TEST . . . . . . . . . . . . . . . . . . 5
DIAGNOSIS AND TESTING - HEATER
PERFORMANCE TEST . . . . . . . . . . . . . . . . . . 6
SPECIFICATIONS - HEATER-A/C SYSTEM
CONTROLS - FRONT
. . . . . . . . . . . . . . . . . . . . . . 8
CONTROLS - REAR
. . . . . . . . . . . . . . . . . . . . . . 29
DISTRIBUTION - FRONT
DISTRIBUTION - REAR
PLUMBING - FRONT
. . . . . . . . . . . . . . . . . . . . . 59
PLUMBING - REAR
. . . . . . . . . . . . . . . . . . . . . . 97
DIESEL SUPPLEMENTAL HEATER - DCHA -
BUX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
• rear window defogger on/off switch. Contains an
LED that illuminates to show when the function is
operational.
• slide controls for completely independent side-to-
side temperature control of the discharged air. The
full range of temperature that the system can pro-
duce in any mode is available on either side of the
vehicle by independently positioning the slide con-
trols on the instrument panel.
• air recirculation on/off switch. The Recirculate
button contains an LED that illuminates to show
when the function is in operation.
• air conditioning on/off switch. The Snowflake
button contains an LED that illuminates to shown
when the function is in operation.
• rotary knob for fan speed selection.
• a rotary knob for mode control.
DESCRIPTION - MANUAL THREE ZONE
The fully adjustable Three-Zone front and rear
heating and air conditioning system allows interme-
diate seat passengers the ability to regulate air tem-
perature as well as fan speed. All controls are
identified by ISO graphic symbols.
The Three Zone Heating and Air Conditioning sys-
tem includes a dust and odor air filter. The filter ele-
ment is the same size as the air conditioning
evaporator to ensure ample capacity. A door at the
base of the heating and air conditioning housing
below the glove box provides easy access to the filter
element.
24 - 1
page
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. . . . . . . . . . . . . . . . . . . . 51
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