Mitsubishi Montero (2002-2004). Manual - part 109

 

  Index      Mitsubishi     Mitsubishi Montero - service repair manual 2002-2004 year

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  107  108  109  110   ..

 

 

Mitsubishi Montero (2002-2004). Manual - part 109

 

 

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-129

STEP 3. Replace the lock sensor.
Q: Does the air conditioning work normally?

YES : No action is necessary and testing is complete.
NO :  Replace the A/C-ECU. (Refer to 

P.55B-136

.) Check 

that the air conditioning works normally.

DATA LIST REFERENCE TABLE

M1554005100051

MUT-II SCAN 
TOOL DISPLAY

ITEM 
NO.

INSPECTION ITEM INSPECTION REQUIREMENT

NORMAL VALUE

A/M DAMPER

31

Air mixing damper 
control motor 
potentiometer

Ignition switch: ON Damper 

position

Opening degree (%)

MAX. HOT

Approx. 100

MAX. COOL

Approx. 0

OUTSIDE TEMP 13

Outside air 
temperature sensor

Ignition switch: ON

Outside air 
temperature and 
temperature 
displayed on the 
scan tool are 
identical.

EVAP TEMP

21

Air thermo sensor

Ignition switch: ON

The temperature of 
the air, which flows 
through the 
evaporator, and 
temperature 
displayed on the 
scan tool are 
identical.

AIR OUT POS

32

Mode selection 
damper control 
motor potentiometer

Ignition switch: ON Damper 

position

Opening degree (%)

FACE

Approx. 0

FOOT

Approx. 50

FOOT/DEF.

Approx. 75

DEF.

Approx. 100

PHOTO SNSR

25

Photo sensor

Ignition switch: ON

Amount of incident 
light is proportional 
to voltage displayed 
on the scan tool.

INSIDE TEMP

11

Inside air 
temperature sensor

Ignition switch: ON

Inside air 
temperature and 
temperature 
displayed on the 
scan tool are 
identical.

HEATER TEMP

15

heater water 
temperature sensor

Ignition switch: ON

ON when heater 
core wall 
temperature is 30

°C 

(86

°F) or higher.

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-130

ACTUATOR TEST REFERENCE

M1554005200058

CHECK AT ECU TERMINAL

M1554005400085

MUT-II SCAN TOOL 
DISPLAY

ITEM NO.

INSPECTION ITEM

DRIVE CONTENT

A/M 0%

05

Air mix damper motor

Opening degree: approx. 
0%

A/M 100%

07

Opening degree: approx. 
100%

A/M 50%

06

Opening degree: approx. 
50%

CLUTCH OFF

11

A/C compressor

OFF

CLUTCH ON

12

ON

DEF

10

Air outlet changeover damper 
motor

DEF

FACE

08

FACE

FAN HI

04

Blower motor

HI

FAN LO

02

LO

FAN ME

03

ME

FAN OFF

01

OFF

FOOT

09

Air outlet changeover damper 
motor

FOOT

FRESH

13

Inlet/outlet air changeover damper 
motor

FRESH

RECIRC

14

RECIRCULATION

1

2 3 4 5 6

7 8

9 10

11 12 13 14 15 16 17 18 19 20

32 33 34

29

30 31

21 22 23 24 25 26 27 28

35 36

AC002694

TERMINAL 
NO.

INSPECTION ITEM

INSPECTION CONDITION

NORMAL 
CONDITION

1

Air mixing damper control motor When the air mix damper is moved to 

the MAX. COOL position. 

10 V

When the air mix damper is moved to 
the MAX. HOT position. 

0.5 V

2

Mode selection damper control 
motor (FACE)

When the damper is moved to the 
FACE position. 

10 V

When the damper is moved to the 
DEF position. 

0.5 V

3

Inside/outside air changeover 
damper motor (inside air)

When the damper flap is moving to 
the inside air recirculation position.

0.5 V

When the damper flap is moving to 
the outside air induction position.

10 V (when the 
motor is stopped)

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-131

4

Inside/outside air changeover 
damper motor (FRESH)

When the damper flap is moving to 
the inside air recirculation position.

0 V (when the 
motor is stopped)

When the damper flap is moving to 
the outside air induction position.

0.5 V

5

Request signal for turning the A/
C compressor on

Dual pressure switch: OFF

System voltage

Dual pressure switch: ON

0 V

6

RV meter communication line

Ignition switch: ON

Hi: 4 

− 5 V

Lo: 0 

− 1 V

7

PCM communication line

When the A/C is off.

0 V

When the A/C (compressor) is 
operating

System voltage

8

-

-

-

9

Lock sensor input

When the compressor is operating

− 0.75 V (pulse 

signal)

10

Heater blower controller unit 
output

When the blower is operating

− 3.5 V 

(alternative 
effective value)

11

Air mixing damper control motor When the air mix damper is moved to 

the MAX. COOL position. 

0.5 V

When the air mix damper is moved to 
the MAX. HOT position. 

10 V

12

Air outlet changeover damper 
motor (DEF)

When the damper is moved to the 
FACE position. 

0.5 V

When the damper is moved to the 
DEF position. 

10 V

13

-

-

-

14

Blower relay

When the blower is stopped

System voltage

When the blower is operating

0 V

15

Rear defogger

Rear defogger: OFF

System voltage

Rear defogger: ON

0 V

16

RV meter communication line

Ignition switch: ON

Hi: 4 

− 5 V

Lo: 0 

− 1 V

17

RV meter communication line

Ignition switch: ON

Hi: 4 

− 5 V

Lo: 0 

− 1 V

18

RV meter communication line 
shield

At all times

0 V

19

Diagnosis data output

Ignition switch: ON

⇔ Battery 

positive voltage

20

A/C compressor relay input

When the A/C is off.

0 V

When the A/C (compressor) is 
operating

System voltage

21

Potentiometer power supply

At all times

5 V

TERMINAL 
NO.

INSPECTION ITEM

INSPECTION CONDITION

NORMAL 
CONDITION

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-132

22

Outside air temperature sensor 
input

When sensor section temperature is 
25

°C (77°F) [4 kΩ]

1.9 V

23

Heater water temperature sensor 
input

When sensor section temperature is 
25

°C (77°F) [4 kΩ]

2.8 V

24

Air mixing damper control motor 
potentiometer input

When the damper door has moved to 
the MAX. HOT position. 

0.7 

− 1.3 V

25

ILL power supply

Lighting switch: ON

System voltage

26

A/C-ECU power supply (IG2)

Ignition switch: ON

System voltage

27

A/C-ECU power supply (ACC)

Ignition switch: ACC

System voltage

28

A/C-ECU power supply (back-
up)

At all times

System voltage

29

Sensors and potentiometers 
ground

At all times

0 V

30

Air thermo sensor input

When sensor section temperature is 
25

°C (77°F) [1.5 kΩ]

2.2 V

31

Photo sensor (+)

At luminous intensity of 100,000 lux 
or more

1 V

32

Mode selection damper control 
motor potentiometer input

When the damper has moved to the 
DEF position. 

0.7 

− 1.3 V

33

DTC input

Ignition switch: ON

0 V

34

A/C compressor lock signal 
(ignition signal)

Engine speed: 3,000 r/min

0.3 

− 3.0 V

35

Illumination ground

At all times

0 V

36

Ground

At all times

0 V

TERMINAL 
NO.

INSPECTION ITEM

INSPECTION CONDITION

NORMAL 
CONDITION

 

 

 

 

 

 

 

Content   ..  107  108  109  110   ..