Mitsubishi Montero (2002-2004). Manual - part 70

REAR HEATER UNIT

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-143

INSPECTION

M1554010400025

.

AIR MIX DAMPER MOTOR CHECK <VEHICLES WITH REAR 
HEATER OR REAR A/C>

CAUTION

Do not apply battery voltage when the damper is in the 
MAX HOT/MAX COOL position.
Check the air mix damper motor by the following procedures.

.

AIR MIX DAMPER POTENTIOMETER CHECK <VEHICLES 
WITH REAR HEATER OR REAR A/C>
When checking the air mix damper motor, measure the resis-
tance value between the terminals 3 and 5, between the termi-
nals 3 and 7. At this time, make sure that the measured 
resistance value changes slowly within the standard value.

Standard value: 1.2 

− 4.8 kΩ

.

AIR THERMO SENSOR CHECK <VEHICLES WITH REAR 
COOLER OR REAR A/C>
NOTE: The temperature conditions when checking should not 
exceed the range shown in the diagram.
When the resistance between the sensor terminals is mea-
sured under two or more temperature conditions, the resis-
tance should approximately satisfy the illustrated values.

.

LEVER POSITION BATTERY 

CONNECTION

LEVER 
OPERATION

At the MAX COOL 
position

• Connect 

terminal 1 to the 
positive battery 
terminal

• Connect 

terminal 2 to the 
negative battery 
terminal

The lever moves 
from the MAX 
COOL position to 
the outside air 
position

At the MAX HOT 
position

• Connect 

terminal 2 to the 
positive battery 
terminal

• Connect 

terminal 1 to the 
negative battery 
terminal

The lever moves 
from the MAX HOT 
position to the 
inside air position

AC001049AB

MAX HOT POSITION

MAX 
COOL 
POSITION

AC001043

RESISTANCE k

Ω

8

6

4

2

0

-10

0

 10

 20

 30

   40

TEMPERATURE ˚C(˚F)

AB

(14)

(32)

(50)

(86)

(104)

(68)

REAR HEATER UNIT

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-144

EXPANSION VALVE (MAGNET VALVE) CHECK <VEHICLES 
WITH REAR A/C SYSTEM>
When battery voltage is applied to the magnetic valve terminal 
No.1 and No.2 terminal is ground, operating sound should be 
heard from the magnetic valve.

REAR BLOWER DISASSEMBLY AND REASSEMBLY

M1554010600029

1 2

AC205153

AC001679AB

1

4

2

5

3

DISASSEMBLY STEPS

1.

HARNESS ASSEMBLY

2.

RESISTOR

3.

AIR OUTLET CHANGEOVER 
DAMPER MOTOR

4.

BLOWER MOTOR ASSEMBLY

5.

CASE

DISASSEMBLY STEPS (Continued)

REAR HEATER UNIT

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-145

INSPECTION

M1554010700026

.

BLOWER MOTOR CHECK
When battery voltage is applied between the terminals, check 
that the motor operates. Also, check that there is no abnormal 
noise.

.

RESISTOR CHECK
Use an ohmmeter to measure the resistance between the ter-
minals. Check that the measured value is at the standard 
value.

AC001038 AB

TESTER CONNECTION

STANDARD VALUE 

Ω

1 

− 6

4.9 

± 0.343

1 

− 3

1.25 

± 0.0875

AC001039AB

COMPRESSOR ASSEMBLY

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-146

COMPRESSOR ASSEMBLY

REMOVAL AND INSTALLATION

M1552004400105

Pre-removal Operation
Refrigerant discharging (Refer to 

P.55A-119

.)

Post-installation Operation
• Refrigerant charging (Refer to 

P.55A-119

.)

• Drive Belt Tension Adjustment (Refer to GROUP 00, 

Maintenance Service 

− Drive Belts 

P.00-39

.)

AC001052

1

2

3

5

6

AC001052AB

N

4

REMOVAL STEPS

<<A>>

1.

DRIVE BELT

<<B>>

2.

DISCHARGE HOSE

<<B>>

3.

SUCTION HOSE

4.

O-RING

<<C>>

>>A<<

5.

COMPRESSOR

6.

COMPRESSOR BRACKET

REMOVAL STEPS (Continued)