heater ISUZU TROOPER 1995 User Guide

1A ";" 12 HEATING AND VENTILATION
4a. Evaporator assembly
• Refer to Section 1 B "AIR CONDITIONING" for
Evaporator Assembly removal procedure.
5. ECM and/or control unit
• Do not disconnect ECM and control unit
connectors.
6. Instrument panel stay
7. Front console
8. Rear heater duct
9. Heater unit
HEATER CORE AND/OR MODE DOOR
3
1

5
2 6
4
I••! INSTALLATION
To install, follow the removal steps in the reverse
order,
noting the following points:
1. When handling the ECM and the control unit, be
careful not to make any improper connection of
the connectors.
2. Adjust control lever assembly cables.
FEI • Refer to "CONTROL LEVER ASSEMBLY"
-installation steps in this section.
3. When installing the heater unit, defroster nozzle
and center vent duct, be sure that proper seal is
made,
without any gap between then.
Removal steps 1. Heater unit 2. Duct 3. Case (Mode control) 4. Case (Temperature control)
5. Heater core 6. Mode door
Installation steps To install, follow the removal steps
in the reverse order.
Fig. 1A-13
..

1••1 REMOVAL
Preparation:
Disconnect the battery ground cable
Drain engine coolant
1. Heaterunit
• Refer to "HEATER UNIT" removal procedure
in
this section.
2. Duct
3. Case (Mode control)
• Do not remove link unit at this step.
4. Case (Temperature control)
• Separate two halves of core case (Fig. 1A-14).
Fig. 1A-14
5. Heater core (Fig. 1A-15)
Fig. 1A-15
HEATING AND VENTILATION 1A-13
6. Mode door
• Pull out the mode door while raising up the
catch
of the door lever (Fig. 1A-16).
Fig. 1A-16
(b!] INSPECTION
Check for foreign matter in the heater core, stain or
the core fin defacement.
l••liNSTALLATION
To install, follow the removal steps in the reverse
order,
noting the following point:
1. Check that each mode door operates properly.

1A-14 HEATING AND VENTILATION
HEATER MODE CONTROL LINK UNIT
2 1
Removal
steps 1. Heater unit 2. Case (Mode control)
3. Washer and mode main lever
4. Rod 5. Mode sub-lever 6. Door lever 7. Clip
Installation
steps
To install, follow the removal steps --------' in the reverse order.
Fig. 1A-17
1••1 REMOVAL
Preparation:
Disconnect the battery ground cable
Drain engine coolant
1. Heater unit
• Refer to "HEATER UNIT" removal procedure
in
this section.
2. Case (Mode control)
•
Remove the case (Mode control) from heater
unit.
3. Washer and mode main lever
4. Rod
5. Mode sub-lever
•
Press the tab of the sub-lever inward, and take
out the sub-lever (Fig. 1A-18).
6. Door lever
• Pull
out the door lever while raising up the
catch
of the door lever (Fig. 1A-16).
7. Clip
I••! INSTALLATION
To install, follow the removal steps in the reverse
order, noting the following points:
1~1 1. Apply grease to mode sub-lever and to the
abrasive surface
of the heater unit.
IL•I 2. After installing the link unit, check to see ifthe
link unit operates correctly.
Fig. 1A-18
•

HEATING AND VENTILATION 1A-15
HEATER TEMPERATURE CONTROL LINK UNIT
5
6
/ /
I I
)
1
Removal steps Installation steps 1. Heater unit 2. Case (Temperature control) To install, follow the removal steps in the
reverse order.
3. Rod 4. Sub-lever
5. Door lever 6. Clip
Fig. 1A-19
1••1 REMOVAL
Preparation:
Disconnect the battery ground cable
Drain engine coolant
1. Heater unit
• Refer to "HEATER UNIT" removal procedure
in this section.
2. Case (Temperature control)
• Remove the case (Temperature control) from
the heater unit.
3. Rod
4. Sub-Lever (Fig. 1A-18)
5. Door Lever
• Pull out the door lever while raising up the
catch of the door lever (Fig. 1A-16).
6. Clip
I••! INSTALLATION
To install, follow the removal steps in the reverse
order,
noting the following points:
1~1 1. Apply grease to sub-lever and to the abrasive
surface
of the heater unit.
I L•l 2. After installing the link unit, check to see if the
link unit operates correctly.

1A-16 HEATING AND VENTILATION
BLOWER ASSEMBLY
Cross beam assembly
Removal steps
1. Instrument panel assembly 2. Resistor connector
3. Duct 3a. Evaporator assembly
lAIC only)
4. Blower motor connector 5. Blower assembly
Installation
steps
To install, follow the removal steps in the reverse order.
A/C -Air Conditioning Heater
unit
Electronic thermostat connector (W A/C)
5
3
3a
Fig.
1A-20
1+•1 REMOVAL
Preparation:
Disconnect the battery ground cable
Discharge and recover refrigerant (W/Air
conditioning)
(Refer to Section 1B "REFRIGERANT RE­
COVERY")
1. Instrument panel assembly
• Refer to Section 10 "BODY" for INSTRUMENT
PANEL ASSEMBLY removal
procedure.
2. Resistor connector
3. Duct
3a. Evaporator Assembly (A/C only)
• Refer to Section 1B "AIR CONDITIONING" for
EVAPORATOR ASSEMBLY removal proce­
dure.
4. Blower motor connector
5. Blower assembly
I••IINSTALLATION
To install, follow the removal steps in the reverse
order,
noting the following point:
1. Adjust control lever assembly cables
r:C1 • Refer to "CONTROL LEVER ASSEMBLY"
L.:D installation procedure in this section.

HEATING AND VENTILATION 1A-19
REAR HEATER DUCT, DEFROSTER NOZZLE AND VENTILATION DUCT
6
Removal steps
1. Instrument panel assembly
2. Center ventilation upper duct
3. Side ventilation duct
4. Center ventilation lower duct
5. Driver lap duct
6. Center console
7. Rear heater duct
8. Cross beam assembly Installation steps
9. Side defroster nozzle
10. Center defroster nozzle
To install, follow the removal
steps in the reverse order.
Fig. 1A-24
B REMOVAL
Preparation:
• Disconnect battery ground cable.
1. Instrument panel assembly
• Refer to Section 10 "BODY" for INSTRUMENT
PANEL ASSEMBLY removal procedure.
2. Center ventilation upper duct
3. Side ventilation duct
4. Center ventilation lower duct
5. Driver lap duct
6. Center console
7. Rear heater duct
• Refer to Section 10 "BODY" for CONSOLES
removal
procedure.
8. Cross beam assembly
• Refer to Section 10 "BODY" for CROSS BEAM
ASSEMBLY
removal procedure.
9. Side defroster nozzle
10. Center defroster nozzle
~!!) INSTALLATION
To intall, 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-22 HEATING AND VENTILATION
Fig. 1A-28
Fig. 1A-29
AIR SELECTOR CABLE
(DEF)
Air selector knob
I••! INSTALLATION
To install, follow the removal steps in the reverse
order,
noting the following points:
1. Adjust the control cables (Fig. 1A-30)
[E • Air source control cable
-(1) Slide the control lever to the left ("CIRC"
position).
(2)
Connect the control cable at the "CIRC"
position of the link unit of blower
assembly and fix it with the clip.
•
Temperature control cable
(1) Turn the control knob to the left ("MAX
COLD" position).
(2)
Connect the control cable at the "COLD"
position of the temperature control link of
the heater unit and fix it with the clip.
•
Air select control cable
(1) Turn the control knob to the right
("DEFROST" position).
(2) Connect the control cable at the
"DEFROST" position of the mode control
link of the heater unit and fix it with the
clip.
2. Check control cable operation.
TEMPERATURE CONTROL CABLE AIR SOURCE SELECT CABLE
(MAX COLD)
Temperature control knob
Fig. 1A-30
Air source select lever
CIRC FRESH
Clip
•

CONTROL PANEL ILLUMINATION BULB
1••1 REMOVAL
Preparation:
Fig. 1A-31
Disconnect
the battery ground cable
1. Control lever assembly
• Refer to "CONTROL LEVER ASSEMBLY"
removal
procedure in this section.
2. Bulb socket
• Pull out the socket from the panel by turning
it counterclockwise.
3.
Illumination bulb
• Pull the illumination bulb from socket.
I••IINSTALLATION
To install, follow the removal steps in the reverse
order.
HEATING AND VENTILATION 1A-23
RESISTOR
1. Glove box
1••1 REMOVAL
Preparation:
3. Duct (Heater only)
Plate
2. Resistor connector
Fig. 1A-32
Disconnect the battery
ground cable
1. Glove box
2. Resistor connector
3. Duct (Heater only)
4. Resistor
I••IINSTALLATION
To install, follow the removal steps in the reverse
order.

1 B - 2 AIR CONDITIONING
GENERAL DESCRIPTION
AIR CONDITIONING REFRIGERANT CYCLE CONSTRUCTION
Side vent Center vent Side vent Side defrost Defrost Side defrost
Lap vent
-
-
:-·-·.·.·.·.·.·.·.·.·.·.·.·.·.\
·.·.·.·.·.·.·.·.·.·.·.·.·.·.·\
.·.·.·.·.·.··:·
2
.,.,.,.,.,.,.,.,.,.,.,. High pressure, high temperature gas
................... High pressure, high temperature ,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,., mixture of gas and liquid
Cooling air
00
1/?//TJZZ High pressure, medium temperature liquid
----Low pressure, low temperature
6
t
mixture of liquid and gas ..,.,§.."\'"":\"':'0:"'":>'""\\":>"'~ Low pressure, low temperature gas __ _j
1. Compressor 10. Blower motor 2. Magnetic clutch 11. Heater unit 3. Receiver/Drier 12. Heater core 4. Dual pressure switch 13. Temp. control door (Air mix door)
5. Condenser
14. Mode (DEF) control door 6. Evaporator assembly 15. Mode (VENT) control door 7.
Expansion valve 16. Mode (HEAT) control door 8. Temperature sensor
17. Electronic thermostat
9. Evaporator core
Fig. 18-1
Outside air

1 B - 8 AIR CONDITIONING
+
RELAY; RESTART
~ ~B BOOV ENG. FRAME
BOOV-Ui II
WIRING DIAGRAM
RELAY; HEATER &NC
A/C: AIR CONDITIONING
BOOV~ 11~--------------------------------------------------------------_j
Fig. 18-9
•