Mitsubishi Montero (2004+). Manual - part 617

 

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Mitsubishi Montero (2004+). Manual - part 617

 

 

SPECIAL TOOLS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-111

SPECIAL TOOLS

M1552000600141

6

Air mixing damper control motor 
<Vehicles with rear heater or Rear 
A/C>

When the damper is moving toward 
the MAX COOL position. 

10 V

When the damper is moving toward 
the MAX HOT position. 

0 V

7

Air mixing damper control motor 
potentiometer input signal <Vehicles 
with rear heater or Rear A/C>

Air mix damper: MAX HOT position

1 V

Air mix damper: MAX COOL position 4 V

8

Sensor and potentiometer ground

At all times

0 V

9

Air outlet changeover damper motor 
signal <Vehicles with Rear A/C>

Ignition switch: ON

− 12 V

10

Air outlet changeover damper motor 
signal <Vehicles with Rear A/C>

Ignition switch: ON

− 12 V

11

Air outlet changeover damper motor 
signal <Vehicles with Rear A/C>

Ignition switch: ON

− 12 V

12

Air thermo sensor input signal

Sensing part temperature: 25 

°C (77 

°F) (1.5 kΩ)

2.2 V

13

Rear fan switch or front rear fan 
switch input

Rear fan switch or front rear fan 
switch: ON

0 V

14

Air mixing damper control motor 
(MAX HOT) <Vehicles with rear 
heater or Rear A/C>

When the damper is moving toward 
the MAX COOL position. 

0.5 V

When the damper is moving toward 
the MAX HOT position. 

Battery positive 
voltage

TERMINAL 
NO.

INSPECTION ITEM

INSPECTION CONDITION

NORMAL 
CONDITION

TOOL

TOOL NUMBER AND 
NAME

SUPERSESSION

APPLICATION

MB991367
Special spanner

MB991367-01

Armature mounting nut of 
compressor removal and 
installation

MB991386
Pin

MIT217213l

MB990784
Ornament remover

General service tool

Center panel removal

B991367

MB990784

ON-VEHICLE SERVICE

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-112

ON-VEHICLE SERVICE

REFRIGERANT LEVEL TEST

M1552008400152

Use the refrigerant recovery station to remove all of the refrig-
erant, and then calculate the amount of the refrigerant and 
charge it.

A/C COMPRESSOR CLUTCH TEST

M1552019900087

1. Disconnect the A/C compressor clutch connector to the A/C 

compressor clutch.

2. Connect the positive battery terminal to the air conditioning 

compressor clutch connector terminal 3, and ground the 
negative battery terminal to the body of the compressor. 

3. If the A/C compressor clutch is normal, there will be a "click." 

If the pulley and armature do not make contact ("click"), 
there is a malfunction.

RECEIVER DRIER TEST

M1552008600123

Turn the A/C on. Check the temperature by touching the 
receiver drier outlet and inlet pipes. If there is a difference in the 
temperatures of the two pipes, the receiver assembly is 
restricted. Replace the receiver assembly.

DUAL PRESSURE SWITCH CHECK

M1552010400267

1. Remove the dual pressure switch connector and connect 

the high/low pressure side terminals located on the harness 
side as shown in the illustration.

2. Install a gauge manifold to the high-pressure side service 

valve of the refrigerant line. (Refer to 

P.55A-146

.)

3. When the high/low pressure sides of the dual pressure 

switch are at operation pressure (ON) and there is continuity 
between the respective terminals, then the condition is 
normal. If there is no continuity, replace the switch.

ACX01440AB

ITEM

OFF to ON

ON to OFF

Low-pressure side 
kPa (psi)

223 

± 27 (32.4 ± 

3.9)

196 

± 20 (28.4 ± 

2.9)

High-pressure side 
kPa (psi)

2,550 

± 200 (369.9 

± 29)

3,140 

± 200 

(455.5 

± 29)

ACX00822

ON

OFF

196 ± 20
(284 ± 2.9)

223 ± 27
(32.4 ± 3.9)

2,550 ± 200
(369.9 ± 29)

3,140 ± 200
(455.5 ± 29)

kPa
(psi)

DUAL PRESSURE 
SWITCH

AF

ON-VEHICLE SERVICE

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-113

COMPRESSOR DRIVE BELT ADJUSTMENT

M1552001000131

Refer to GROUP 00, Maintenance Service 

− Drive Belts 

P.00-41

.

CHARGING 

M1552001200276

Use the refrigerant recovery station to charge the refrigerant.

METHOD BY USING REFRIGERANT RECOVERY 
AND RECYCLING UNIT

Using the refrigerant recovery and recycling unit, refill the 
refrigerant.
NOTE: Refer to the Refrigerant Recovery and Recycling Unit 
Instruction Manual for operation of the unit.

DISCHARGING SYSTEM

Use the refrigerant recovery unit to discharge refrigerant gas 
from the system.
NOTE: Refer to the Refrigerant Recovery and Recycling Unit 
Instruction Manual for operation of the unit.

REFILLING OF OIL IN THE A/C SYSTEM

Too little oil will provide inadequate compressor lubrication and 
cause a compressor failure. Too much oil will increase dis-
charge air temperature.
When a compressor is installed at the factory, it contains 120 
cm

3

 (4.1 floz) of refrigerant oil. While the A/C system is in oper-

ation, the oil is carried through the entire system by the refriger-
ant. Some of this oil will be trapped and retained in various 
parts of the system.
When the following system components are replaced, it is nec-
essary to add oil to the system to replace the oil being removed 
with the component.

Compressor oil: SUN PAG 56
Quantity:

• Evaporator: 60 cm

3

 (2.0 floz)

• Condenser: 15 cm

3

 (0.5 floz)

• Suction hose: 10 cm

3

 (0.3 floz)

• Receiver: 10 cm

3

 (0.3 floz) 

PERFORMANCE TEST

M1554008800026

1. The vehicles to be tested should be in a place that is not in 

direct sunlight.

ON-VEHICLE SERVICE

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-114

2. Close the high and low-pressure valve of the gauge 

manifold.

3. Connect the charging hose (blue) to the low-pressure valve 

and connect the charging hose (red) to the high-pressure 
valve of the gauge manifold.

4. Install the quick joint (for low-pressure) to the charging hose 

(blue), and connect the quick joint (for high-pressure) to the 
charging hose (red).

CAUTION

• To connect the quick joint, press section A firmly 

against the service valve until a click is heard.

• When connecting, run your hand along the hose while 

pressing to ensure that there are no bends in the hose.

5. Connect the quick joint (for low-pressure) to the 

low-pressure service valve and connect the quick joint (for 
high-pressure) to the high-pressure service valve.
NOTE: The high-pressure service valve is on A/C pipe and 
the low-pressure service valve is on the suction hose.

6. Start the engine.
7. Set the A/C controls as follows:

<Testing the front-A/C>

• A/C switch: A/C − ON position

• Mode selection: FACE position

• Temperature control: MAXIMUM COOLING position

• Air selection: RECIRCULATION position

• Blower switch: FAST position 

8. Set the A/C controls as follows:

<Testing the rear-A/C>

• The front A/C should be set as described in step 7. 

• A/C switch: A/C-ON position

• Temperature control: MAXIMUM COOLING position

• Blower switch: FAST position 

9. Adjust engine speed to 1,500 r/min with A/C clutch engaged.
10.Engine should be warmed up with doors and windows 

closed.

AC001388

LOW-PRESSURE
VALVE

HIGH-PRESSURE
VALVE

GAUGE MANIFOLD

CHARGING
HOSE (RED)

A

SLEEVE

CHARGING
HOSE (BLUE)

ADAPTOR
VALVE
(FOR
LOW-PRES-
SURE)

ADAPTOR
VALVE
(FOR HIGH-
PRESSURE)

LOW-
PRESSURE
SERVICE
VALVE

HIGH-
PRESSURE
SERVICE
VALVE

AB

 

 

 

 

 

 

 

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