Mitsubishi Montero (2002-2004). Manual - part 65

ON-VEHICLE SERVICE

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-123

2. Tighten all compressor mounting bolts, clutch mounting bolt, 

and compressor drive belt. Check to assure clutch coil is 
tight (no rotation or wobble).

3. Check refrigerant hoses for rubbing or interference that can 

cause unusual noises.

4. Check refrigerant charge. (Refer to 

P.55A-119

.)

5. Recheck compressor noise as in Step 1.
6. If noise still exists, loosen compressor mounting bolts and re 

torque. Repeat Step 1.

7. If noise continues, replace compressor and repeat Step 1.

POWER RELAY CHECK

M1552008800235

.

FRONT BLOWER RELAY
Follow the table below to check the front blower relay for conti-
nuity.

.

BATTERY VOLTAGE

TESTER 
CONNECTION 

SPECIFIED 
CONDITION

Not applied

2 

− 5

Open circuit

• Connect terminal 3 

to the positive 
battery terminal

• Connect terminal 1 

to the negative 
battery terminal

2 

− 5

Less than 2 ohms

AC204714AB

FRONT BLOWER RELAY

ON-VEHICLE SERVICE

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-124

A/C COMPRESSOR RELAY, CONDENSER FAN RELAY
Follow the table below to check the A/C compressor relay and 
condenser fan for continuity.

.

REAR BLOWER RELAY
Follow the table below to check the rear blower relay for conti-
nuity.

BATTERY VOLTAGE

TESTER 
CONNECTION 

SPECIFIED 
CONDITION

Not applied

4 

− 5

Open circuit

• Connect terminal 3 to 

the positive battery 
terminal

• Connect terminal 1 to 

the negative battery 
terminal

4 

− 5

Less than 2 
ohms

AC204715

3

1

4

5

AB

CONDENSER 
FAN RELAY

A/C 
COMPRESSOR 
RELAY

BATTERY

BATTERY VOLTAGE

TESTER 
CONNECTION 

SPECIFIED 
CONDITION

Not applied

4 

− 5

Open circuit

• Connect terminal 1 

to the positive 
battery terminal

• Connect terminal 3 

to the negative 
battery terminal

4 

− 5

Less than 2 ohms

AC204714

REAR BLOWER RELAY

AC

ON-VEHICLE SERVICE

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-125

IDLE-UP OPERATION CHECK

M1552001600263

.

1. Before inspection and adjustment, set vehicle in the 

following condition:

• Engine coolant temperature: 80 − 90 °C (176 − 194 °F)

• Lights, electric cooling fan and accessories: Set to OFF

• Transmission: "N" or "P" position

• Steering wheel: Straightforward

2. Check whether or not the idling speed is the standard value.

Standard value: 700 

± 50 r/min 

NOTE: There is no necessity to make an adjustment, 
because the idling speed is automatically adjusted by the 
idle speed control system. If, however, there occurs a devia-
tion from the standard value for some reason, check the idle 
speed control system. Refer to GROUP 13A, On-vehicle 
Service 

P.11A-7

.

3. When the A/C is running after turning the A/C switch to ON, 

and the blower switch to the MH or HI position, check to be 
sure that the idle speed is at the standard value.

Standard value:

NOTE: It depends on the outside air temperature signal 
whether a low load, a middle load or a high load is applied to 
the air conditioning. The PCM receives the signal via the 
automatic compressor controller and determines whether 
the air conditioning is working under high, middle or low 
load.

VEHICLE CONDITION

IDLE-UP 
SPEED r/min

When the air conditioning is working under 
low load (Outside air temperature sensor: 
ON)

700 

± 50

When the air conditioning is working under 
middle load (Outside air temperature 
sensor: OFF)

800 

± 50

When the air conditioning is working under 
high load (Outside air temperature sensor: 
OFF)

1,000 

± 50

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

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-126

HEATER CONTROL ASSEMBLY, A/C SWITCH AND INSIDE/

OUTSIDE CHANGEOVER SWITCH

REMOVAL AND INSTALLATION

M1552012400047

INSTALLATION SERVICE POINTS

.

>>A<< AIR OUTLET CHANGEOVER DAMPER LEVER 
CABLE INSTALLATION
1. Set the air outlet changeover control knob on the heater 

control assembly to the defroster position.

2. Set the air outlet changeover damper lever of the heater/

cooler unit to the defroster position as shown in the 
illustration, and then connect the cable to the link 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.

4. After installation, ensure that each damper operates 

smoothly by operating the heater control assembly knob.

.

>>B<< AIR MIX DAMPER LEVER CABLE INSTALLATION
1. Set the temperature control knob on the heater control 

assembly to the maximum hot position.

Pre-removal and Post-installation Operation
• Front Driver's Side Under Cover Removal and Installation 

(Refer to GROUP 52A, Instrument Panel 

P.52A-2

.)

• Floor Console Removal and Installation (Refer to GROUP 

52A, Floor Console 

P.52A-7

.)

• Foot Duct C and Foot Duct D Removal and Installation 

(Refer to 

P.55A-155

.)

AC000934 AB

1

2

3

4

REMOVAL STEPS

1.

CENTER PANEL (REFER TO 
GROUP 52A, INSTRUMENT 
PANEL 

P.52A-2

.)

>>B<<

2.

AIR MIX DAMPER LEVER CABLE

>>A<<

3.

AIR OUTLET CHANGEOVER 
DAMPER LEVER CABLE

4.

HEATER CONTROL ASSEMBLY

REMOVAL STEPS (Continued)

AC000932 AB

DEFROSTER POSITION

FACE POSITION