Mitsubishi Montero Sport (2004+). Manual - part 605

REAR HEATER UNIT

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55-47

INSPECTION

M1556001100107

REAR HEATER SWITCH CONTINUITY CHECK

REAR BLOWER MOTOR OPERATION CHECK

Check that the motor rotates when the battery voltage is 
applied between the terminals. Make sure that there is no 
abnormal noise from the motor at this time.

RESISTER CHECK

Use an ohmmeter to check the resistance between terminals 
number 3 and number 4.

Standard value: 3.9 

Ω

SWITCH 
POSITION

TESTER 
CONNECTION

SPECIFIED 
CONDITION

At the OFF 
position

1 

− 4

2 

− 4

Open circuit

At the LO 
position

2 

− 4

Less than 2 ohms

At the HI position 1 

− 4

Less than 2 ohms

AC104802

OFF

LO

HI

AB

BATTERY CONNECTION SPECIFIED CONDITION

• Connect terminal 1 to 

the positive battery 
terminal

• Connect terminal 3 to 

the negative battery 
terminal

Blower motor rotates (HI).

• Connect terminal 1 to 

the positive battery 
terminal

• Connect terminal 4 to 

the negative battery 
terminal

Blower motor rotates (LO).

AC002862 AB

AC002863AB

COMPRESSOR ASSEMBLY

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55-48

COMPRESSOR ASSEMBLY

REMOVAL AND INSTALLATION

M1552004400149

WARNING

When removing and installing the compressor from vehicles equipped with SRS, do not let it 
bump against the front impact sensor (LH).

Pre-removal Operation
• Refrigerant discharging (Refer to 

P.55-28

.)

• Battery Removal

Post-installation Operation
• Refrigerant Charging (Refer to 

P.55-28

.)

• Drive Belt Tension Adjustment (Refer to GROUP 00, 

Maintenance Service 

− Drive Belts 

P.00-46

.)

• Battery Installation

AC002864 AB

HOSE CONNECTION

COMPRESSOR OIL: 
SUN PAG56

1

2

3

4

5

6

7

8

N

4

REMOVAL STEPS

<<A>>

1.

DRIVE BELT

<<B>>

2.

SUCTION HOSE CONNECTION

<<B>>

3.

DISCHARGE HOSE 
CONNECTION

4.

O-RING

<<C>>

>>A<<

5.

COMPRESSOR

6.

TENSION PULLEY

7.

COMPRESSOR BRACKET 
ASSEMBLY

8.

TENSION PULLEY BRACKET 
ASSEMBLY

REMOVAL STEPS (Continued)

COMPRESSOR ASSEMBLY

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55-49

REMOVAL SERVICE POINTS

.

<<A>> DRIVE BELT REMOVAL
1. Loosen the nut "A" for holding.
2. Loosen the bolt "B" for adjustment.
3. Remove the drive belt.

.

<<B>> SUCTION HOSE, DISCHARGE HOSE REMOVAL

CAUTION

Seal the hoses completely, otherwise the compressor oil 
and receiver will absorb water vapor easily, possibly dam-
aging the compressor and deteriorating performance.
Plug the disconnected hose and compressor nipple to prevent 
foreign matter from getting into them.

.

<<C>> COMPRESSOR REMOVAL
When removing the compressor, be careful not to spill the com-
pressor oil.

INSTALLATION SERVICE POINT

.

>>A<< COMPRESSOR INSTALLATION
If a new compressor is installed, first adjust the amount of oil 
according to the procedures described below, and then install 
the compressor.
1. Measure the amount [X cm

3

 (X floz)] of oil within the 

removed compressor.

2. Drain (from the new compressor) the amount of oil 

calculated according to the following formula, and then 
install the new compressor.
New compressor oil amount: 170 cm

3

 (5.7 floz)

170 cm

3

 

− X cm

3

 = Y cm

3

 (5.7 floz 

− X floz = Y floz) 

NOTE: Y cm

3

 (Y floz) indicates the amount of oil in the refriger-

ant line, the condenser, the evaporator, etc.
NOTE: When replacing the following parts at the same times as 
the compressor, subtract the rated oil amount of the each part 
from Y cm

3

 (Y floz) and discharge from the new compressor.

Quantity:

• Evaporator: 70 cm

3

 (2.4 floz)

• Condenser: 20 cm

3

 (0.7 floz)

• Suction hose: 10 cm

3

 (0.3 floz)

• Receiver: 10 cm

3

 (0.3 floz) 

AC002865

A

B

AB

COMPRESSOR ASSEMBLY

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55-50

INSPECTION

M1556001100163

REFRIGERANT-TEMPERATURE SWITCH SIMPLE 
CHECK

When the A/C is off, check that there is continuity between the 
refrigerant-temperature switch terminals. If not, replace the 
compressor assembly.

COMPRESSOR A/C COMPRESSOR CLUTCH 
OPERATION INSPECTION

Connect the positive battery terminal to the compressor A/C 
compressor clutch connector terminal 3, and ground the nega-
tive battery terminal to the body of the compressor. The condi-
tion is normal if the sound of the A/C compressor clutch (click) 
can be heard.

AC002866 AB

REFRIGERANT 
TEMPERATURE 
SWITCH TERMINALS

AC002842

A/C COMPRESSOR CLUTCH

CONNECTOR

AC