Mitsubishi Montero (2002-2004). Manual - part 66

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

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-127

2. Set the air mix damper lever of the heater/cooler unit to the 

maximum hot position as shown in the illustration, and then 
connect the cable to the lever pin.

3. Push the outer cable in the direction of the arrow so that 

there is no looseness, and then secure it with the clip.

INSPECTION

M1552012500055

DEFROSTER SWITCH CONTINUITY CHECK

Follow the table below to check the defroster switch for continu-
ity.

BLOWER SWITCH ASSEMBLY CONTINUITY 
CHECK

.

BLOWER SWITCH
Follow the table below to check the blower switch for continuity.

AC000933 AC

MAXIMUM HOT POSITION

MAXIMUM COOL 
POSITION

AIR OUTLET 
CHANGEOVER 
CONTROL KNOB 
POSITION

TESTER 
CONNECTION 

SPECIFIED 
CONDITION

At the 
"DEFROSTER" or 
"DEFROSTER/
FOOT" position

2 

− 3

Less than 2 ohms

At the other 
positions

1 

− 3

Less than 2 ohms

AC001398

HEATER
CONTROL
ASSEMBLY

AB

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

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-128

.

A/C SWITCH
Follow the table below to check the A/C switch for continuity.

.

INSIDE/OUTSIDE AIR CHANGEOVER SWITCH
Follow the table below to check the inside/outside air 
changeover switch for continuity.

SWITCH 
POSITION

TESTER 
CONNECTION 

SPECIFIED 
CONDITION

0 (OFF)

1 

− 3, 3 − 4, 3 − 5, 3 − 

6

Open circuit

1 (LO)

3 

− 5

Less than 2 ohms

2 (ML)

3 

− 1

Less than 2 ohms

3 (MH)

3 

− 6

Less than 2 ohms

4 (HI)

3 

− 4

Less than 2 ohms

SWITCH 
POSITION

TESTER 
CONNECTION 

SPECIFIED 
CONDITION

OFF

5 

− 6

Open circuit

ON

5 

− 6

Less than 2 ohms

SWITCH 
POSITION

TESTER 
CONNECTION 

SPECIFIED 
CONDITION

Inside air

4 

− 5

Open circuit

Outside air

4 

− 5

Less than 2 ohms

AC001399

CONNECTOR A

CONECTOR B

OFF

ON

OFF

ON

A/C SWITCH

AB

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

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-129

HEATER CONTROL ASSEMBLY

M1551001300065

DISASSEMBLY AND ASSEMBLY

DISASSEMBLY SERVICE POINT

.

<<A>> AIR OUTLET CHANGEOVER DAMPER LEVER 
CABLE AND AIR MIX DAMPER LEVER CABLE REASSEM-
BLY 
Insert a flat-tipped screwdriver into the control base clip from 
inner side, and then remove the cable by lifting the claw part of 
the clip.

AC001035

1

2

3

4

5

6

7

AB

DISASSEMBLY STEPS

1.

KNOB

2.

BULB

<<A>>

3.

AIR OUTLET CHANGEOVER 
DAMPER LEVER CABLE

<<A>>

4.

AIR MIX DAMPER CHANGEOVER 
LEVER CABLE

5.

DEFROSTER SWITCH

6.

HEATER CONTROL PANEL

7.

BLOWER SWITCH ASSEMBLY

DISASSEMBLY STEPS 

AC001031       

AB

FLAT-TIPPED 

SCREW DRIVER

TAB

HEATER UNIT

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-130

HEATER UNIT

REMOVAL AND INSTALLATION

M1551001600066

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 (Refer to 

P.55A-

119

.)

• Engine coolant draining and refilling (Refer to GROUP 00, 

Maintenance Service - Engine Coolant (Charge) 

P.00-44

.)

• Instrument Panel Removal and Installation (Refer to 

GROUP 52A, Instrument Panel 

P.52A-2

.)

• Steering column shaft and front crossmember union bolt 

(Refer to GROUP 37A, Steering Wheel and Shaft 

P.37A-

23

.)

ACX01458

12 ± 2 N·m
106 ± 17  in-lb

9.8 ± 2 N·m
87 ± 17 in-lb

3

22 ± 4 N·m
16 ± 5  ft-lb

7

6

8

10

9

4

1

2

11

N

N

N

N

N

N

5

AB

REMOVAL STEPS

1. DRAIN HOSE
2. HEATER HOSE

<<A>>

3. SUCTION HOSE

<<A>>

4. LIQUID PIPE
5. HARNESS CONNECTORS
6. FOOT DUCT B

7. FOOT DUCT D
8. FRONT DECK CROSSMEMBER
9. FLANGE BRACKET
10. BLOWER ASSEMBLY
11. HEATER UNIT

REMOVAL STEPS (Continued)