2002 ISUZU AXIOM heater

1A±8
HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Removal
1. Disconnect the battery ground cable.
2. Drain the engine coolant.
3. Discharge and recover refrigerant (with air
conditioning).

Refer to
Refrigerant Recovery in this section.
4. Remove heater unit.

Refer to
Heater Unit in this section.
5. Remove duct.
6. Remove mix actuator.
7. Remove mode actuator.
8. Remove case (Mode control) and do not remove link
unit at this step.
9. Remove case (Temperature control) separate two
halves of core case.
860RS002
10. Remove heater core (1).
860RS003
11. Pull out the mode door while raising up the catch of
the door lever.
860RS004
Inspection
Check for foreign matter in the heater core, stain or the
core fin defacement.
Installation
To install, follow the removal steps in the reverse order,
noting the following point:
1. Check that each mode door operates properly.

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
1A±9
Heater Mode Control Link Unit
Disassembled View
860R200002
Legend
(1) Case (Mode Control)
(2) Heater Unit
(3) Mode Sub-lever
(4) Clip(5) Door Lever
(6) Rod
(7) Mode Actuator
(8) Washer and Mode Main Lever
Removal
1. Disconnect the battery ground cable.
2. Drain engine coolant.
3. Discharge and recover refrigerant (with air
conditioning)

Refer to
Refrigerant Recovery in this section.
4. Remove heater unit.

Refer to
Heater Unit in this section.
5. Remove mode actuator.
6. Remove the case (Mode control) from heater unit.
7. Remove washer and the mode main lever.
8. Remove rod.
9. Press the tab of the sub-lever inward, and take out the
sub-lever.
860RS006

1A±10
HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
10. Pull out the door lever while raising up the catch of the
door lever.
11. Remove clip.
Installation
To install, follow the remove steps in the reverse order,
noting the following points:
1. Apply grease to the mode sub-lever and to the
abrasive surface of the heater unit.
2. After installing the link unit, check to see if the link unit
operates correctly.

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
1A±11
Heater Temperature Control Link Unit
Disassembled View
860R200003
Legend
(1) Case (Temperature control)
(2) Door Lever
(3) Clip
(4) Rod(5) Clip
(6) Sub-lever
(7) Mix Actuator
(8) Heater Unit
Removal
1. Disconnect the battery ground cable.
2. Drain engine coolant.
3. Discharge and recover refrigerant (with air
conditioning).

Refer to
Refrigerant Recovery in this section.
4. Remove heater unit.

Refer to
Heater Unit in this section.
5. Remove mix actuator.
6. Remove the case (Temperature control) from the
heater unit.
7. Remove rod.
8. Remove sub-lever.
9. Pull out the door lever while raising up the catch of the
door lever.
10. Remove clip.
Installation
To install, follow the removal steps in the reverse order,
noting the following points:
1. Apply grease to the sub-lever and to the abrasive
surface of the heater unit.
2. After installing the link unit, check to see if the link unit
operates correctly.

1A±12
HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Blower Assembly
Blower Assembly and Associated Parts
873R200004
Legend
(1) Instrument Panel Assembly
(2) Blower Assembly(3) Evaporator Assembly
(4) Heater Unit
Removal
1. Disconnect the battery ground cable.
2. Discharge and recover refrigerant (with air
conditioning).

Refer to
Refrigerant Recovery in this section.
3. Remove instrument panel assembly.

Refer to
Instrument Panel Assembly in Body and
Accessories section.
4. Disconnect power transistor connector.
5. Remove evaporator assembly.

Refer to
Evaporator Assembly in this section.
6. Disconnect blower motor/intake actuator connector.
7. Remove blower assembly.
Installation
To install, follow the removal steps in the reverse order.

1A±16
HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Rear Heater Duct, Defroster Nozzle and Ventilation Duct
Rear Heater Duct, Defroster Nozzle, Ventilation Duct and Associated Parts
840R200009
Legend
(1) Defroster Nozzle
(2) Cross Beam Assembly
(3) Center Ventilation Duct and Side Defroster
Duct(4) Instrument Panel Bracket W/Suspension
Control Unit
(5) Instrument Panel Assembly
(6) Rear Heater Duct
(7) Ventilation Lower Duct
Removal
1. Disconnect the battery ground cable.
2. Remove instrument panel assembly.

Refer to
Instrument Panel Assembly in Body and
Accessories section.
3. Remove center ventilation duct and side defroster
duct.

Remove 5 screws.4. Remove instrument panel brackets w/suspension
control unit.

Refer to
Cross Beam Assembly in Body and
Accessories section.
5. Remove cross beam assembly.

Refer to
Cross Beam Assembly in Body and
Accessories section.
6. Remove ventilation lower duct.

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
1A±17
7. Remove rear heater duct.

Remove foot rest carpet and 3 clips.
8. Remove defroster nozzle.
Installation
To install, follow the removal steps in the reverse order,
noting the following point:
1. Connect each duct and nozzle securely leaving no
clearance between them and making no improper
matching.

1A±18
HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Air Conditioning System
General Description
Air Conditioning Refrigerant Cycle Construction
C01RY00013
Legend
(1) Duct Sensor
(2) Evaporator Core
(3) Evaporator Assembly
(4) Temperature Sensor
(5) Blower Motor
(6) Expansion Valve
(7) Pressure Switch
(8) Receiver/Drier(9) Condenser
(10) Compressor
(11) Magnetic Clutch
(12) Mode (HEAT) Control Door
(13) Temp. Control Door (Air Mix Door)
(14) Heater Core
(15) Mode (VENT) Control Door
(16) Heater Unit
(17) Mode (DEF) Control Door
The refrigeration cycle includes the following four
processes as the refrigerant changes repeatedly from
liquid to gas and back to liquid while circulating.