Mitsubishi Montero Sport (2004+). Manual - part 603

HEATER CONTROL ASSEMBLY, A/C SWITCH AND INSIDE/OUTSIDE CHANGEOVER SWITCH

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55-39

BLOWER SWITCH CONTINUITY CHECK

MICRO SWITCH CONTINUITY CHECK

SWITCH 
POSITION

TESTER 
CONNECTION 

SPECIFIED 
CONDITION

At the "OFF" 
position

1 

− 8

2 

− 5

3 

− 5

5 

− 6

5 

− 7

Open circuit

At the "LO" position 1 

− 8

3 

− 5

Less than 2 ohms

At the "ML" position 1 

− 8

5 

− 6

Less than 2 ohms

At the "MH" 
position

1 

− 8

2 

− 5

Less than 2 ohms

At the "HI" position 1 

− 8

5 

− 7

Less than 2 ohms

AC002851AB

AIR OUTLET 
CHANGEOVER 
CONTROL KNOB 
POSITION

TESTER 
CONNECTION 

SPECIFIED 
CONDITION

At the 
"DEFROSTER, 
DEFROSTER/FOO
T" position

1 

− 3

Less than 2 ohms

Other position

1 

− 3

Open circuit

AC002852AB

HEATER UNIT AND HEATER CORE

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55-40

HEATER UNIT AND HEATER CORE

REMOVAL AND INSTALLATION

M1551001900078

WARNING

When removing and installing the heater unit, do not let it bump against the SRS-ECU or the 
components.

Pre-removal and Post-installation Operation
• Refrigerant Discharging and Charging <Vehicles with 

A/C> (Refer to 

P.55-28

.)

• Engine Coolant Draining and Refilling (Refer to GROUP 

14, On-vehicle Service 

P.14-2

.)

• Instrument panel Removal and Installation (Refer to 

GROUP 52A, Instrument Panel 

P.52A-37

.)

• Joint Duct Removal and Installation <Vehicles without 

A/C> (Refer to 

P.55-3

.)

AC306350AB

1

2

3

4

5

6

7

10

8

9

N

PIPING

CONNECTION

COMPRESSOR OIL:
SUN PAG56

5

REMOVAL STEPS

1.

CENTER REINFORCEMENT

2.

CENTER VENTILATION DUCT

3.

DRAIN HOSE <VEHICLES WITH 
A/C>

<<A>>

4.

SUCTION PIPE OR HOSE AND 
DISCHARGE PIPE CONNECTION 
<VEHICLES WITH A/C>

5.

O-RING

6.

HEATER HOSE CONNECTION

>>B<<

7.

EVAPORATOR <VEHICLES WITH 
A/C>

8.

HEATER UNIT

>>A<<

9.

WATER SHUT MOTOR

10. HEATER CORE

REMOVAL STEPS (Continued)

HEATER UNIT AND HEATER CORE

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55-41

REMOVAL SERVICE POINT

.

<<A>> SUCTION PIPE OR HOSE, DISCHARGE PIPE DIS-
CONNECTION

CAUTION

Seal the hose 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 the evaporator nipple to pre-
vent foreign material from getting into them.

INSTALLATION SERVICE POINT

.

>>A<< HEATER CORE INSTALLATION
After replacing the heater core, check that the water shut valve 
is at "OPEN" position when refilling engine coolant.

.

>>B<< EVAPORATOR INSTALLATION
When replacing the evaporator, refill with a specified amount of 
compressor oil and install it (to the vehicle).

Compressor oil: SUN PAG56

Quantity: 70cm

3

(2.4 floz)

INSPECTION

M1552014301113

WATER SHUT MOTOR CHECK

CAUTION

When the motor stops, disconnect battery cable.

AC306351AB

OPEN 
SIDE

CLOSE
SIDDE

LEVER POSITION BATTERY 

CONNECTION

LEVER 
OPERATION

At the open position

• Connect 

terminal 3 to the 
positive battery 
terminal

• Connect 

terminal 1 to the 
negative battery 
terminal

The lever moves 
from the open 
position to the 
closed position

At the close 
position

• Connect 

terminal 3 to the 
positive battery 
terminal

• Connect 

terminal 2 to the 
negative battery 
terminal

The lever moves 
from the closed 
position to the open 
position

AC306351AB

OPEN 
SIDE

CLOSE
SIDDE

BLOWER ASSEMBLY AND RESISTOR

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55-42

BLOWER ASSEMBLY AND RESISTOR

REMOVAL AND INSTALLATION

M1551002800245

AC002854 AB

1

2

3

4

5

6

7

8

9

10

11

4

<VEHICLES WITHOUT A/C>

<VEHICLES WITH A/C>

: Metal clip position

NOTE

RESISTER, BLOWER FAN AND 
MOTOR REMOVAL STEPS

1.

UNDER COVER

2.

GLOVE BOX ASSEMBLY

3.

CORNER COVER

4.

RESISTOR

5.

BLOWER FAN AND MOTOR
BLOWER CASE REMOVAL 
STEPS

•

INSTRUMENT PANEL (REFER TO 
GROUP 52A, INSTRUMENT 
PANEL 

P.52A-37

.)

6.

GLOVE BOX FRAME

7.

JOINT DUCT <VEHICLES 
WITHOUT A/C>

8.

COVER <VEHICLES WITH A/C> 

9.

EVAPORATOR <VEHICLES WITH 
A/C> (REFER TO 

P.55-44

.) 

10. INSIDE /OUTSIDE AIR 

CHANGEOVER DAMPER MOTOR

11. BLOWER CASE ASSEMBLY

BLOWER CASE REMOVAL 
STEPS (Continued)