Mitsubishi Montero (2004+). Manual - part 655

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-109

STEP 19. Check the rear window defogger switch.

There should be continuity between terminals 6 and 13 while 
the rear window defogger switch is pushed.
Q: Is the check result normal?

YES : Replace the A/C-ECU. Check that the defogger 

system works normally.

NO :  Replace the automatic air-conditioning control panel. 

Check that the defogger system works normally.

AC205403

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

AE

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-110

INSPECTION PROCEDURE 9: Condenser Fan does not Operate.

FUSIBLE
LINK

IGNITION
SWITCH (IG1)

JUNCTION 
BLOCK

RELAY
BOX

CONDENSER
FAN CONTROL
RELAY

CONDENSER
FAN MOTOR

POWERTRAIN
CONTROL
MODULE

JOINT 
CONNECTOR (3)

JOINT 
CONNECTOR (1)

JOINT 
CONNECTOR (2)

2

Condenser Fan Motor Circuit

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-111

DIAGNOSIS

Required Special Tool:

• MB991223: Test Harness Set

AC204167

CONNECTORS : A-03, A-15, 
A-16, A-17, A-26

BB

A-03(B)

A-15

A-16

A-17(GR)

A-26(B)

AC204183

CONNECTOR : A-09X

AR

AC204170

CONNECTOR : D-28

BB

AC204171 BA

D-132(GR)

CONNECTOR : D-132

AC204173

CONNECTORS : D-208, D-210

BF

D-208

D-210

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-112

STEP 1. Check the powertrain control module.
(1) Disconnect powertrain control module connector D-132.
(2) Turn the ignition switch to the "ON" position.

(3) Ground harness-side powertrain control module connector 

D-132 (terminal 17). 

(4) The condenser fan motor should run.
Q: Is the check result normal?

YES : Replace the powertrain control module. Check that 

the condenser motor works normally.

NO :   Go to Step 2.

STEP 2. Check the condenser fan control relay continuity.

Follow the table below to check the condenser fan control relay 
for continuity.

Q: Is the condenser fan control relay in good condition?

YES : Go to Step 3.
NO :  Replace the A/C compressor relay. Check that the 

condenser motor works normally.

AC204171

CONNECTOR : D-132

D-132(GR)

D-132(GR)

AS

HARNESS SIDE

8

23

1110

24

9

6

22

7

16

17

15

3

4

1312

19

20
2726

2

1
5

14
21

25

18

AC205177

8

23

1110

24

9

6

22

7

16

17

15

3

4

13 12

19

20
27 26

2

1
5

14

21

25

18

HARNESS SIDE : D-132

AB

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

AF

BATTERY

CONDENSER 
FAN CONTROL
RELAY