Mitsubishi Montero (2004+). Manual - part 616

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-107

NOTE: Also check intermediate connector D-112, joint connec-
tor (6) D-01, junction block connector C-210 and D-208. If inter-
mediate connector D-112, joint connector (6) D-01, junction 
block connector D-210 and D-208 is damaged, repair or 
replace the connector as described in GROUP 00E, Harness 
Connector Inspection 

P.00E-2

.

Q: Is the wiring harness between rear A/C unit connector 

G-22 (terminal 4) and the ignition switch (IG2) in good 
condition?
YES : Check that the rear air conditioning works normally.
NO :  Repair the wiring harness. Check that the rear air 

conditioning works normally.

AC204170

CONNECTOR: D-01

AB

9 10

8

6 7

31 32

30

29

18 19 20 21

5

4

2

1

3

27

26

24

23

25

12 13 14 15 16 17

28

11
22
33

AC204171 AL

CONNECTOR : D-112

2 3

27

32

28

33

16

15

4 5

19

18

29

17

34

7 8

35

22

21

9 10

30

36

31

37

25

24

23

6

20

1

14

26

11

13

12

38

AC204191

CONNECTORS: D-208, D-210

D-208

AC

HARNESS SIDE

HARNESS SIDE

D-210

D-208

D-210

1

2

3

5

6

4

1

2

7 6

3

9

4

11

12

10

13

5

8

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-108

STEP 8. Check rear A/C unit connector G-22 and mode 
selection damper control motor connector G-22-3 for 
damage.

Q: Is rear A/C unit connector G-22 and mode selection 

damper control motor connector G-22-3 for damage in 
good condition?
YES : Go to Step 9.
NO :  Repair or replace the connector. Refer to GROUP 

00E, Harness Connector Inspection 

P.00E-2

. Check 

that the rear air conditioning works normally.

STEP 9. Check the wiring harness between rear A/C unit 
connector G-22 (terminal 3 and 4) and mode selection 
damper control motor connector G-22-3 (terminal 1 and 2).

Q: Is the wiring harness between rear A/C unit connector 

G-22 (terminal 3 and 4) and mode selection damper 
control motor connector G-22-3 (terminal 1 and 2) in 
good condition?
YES : Go to Step 10.
NO :  Repair the wiring harness. Check that the rear air 

conditioning works normally.

AC204179

CONNECTOR : G-22

AP

HARNESS SIDE

1

5

7

8

2

6

10

4

9

3

AC204698

CONNECTOR : G-22-3

AG

HARNESS SIDE

7 6 5 4 3 2 1

AC204179

CONNECTOR : G-22

AP

HARNESS SIDE

1

5

7

8

2

6

10

4

9

3

AC204698

CONNECTOR : G-22-3

AG

HARNESS SIDE

7 6 5 4 3 2 1

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-109

STEP 10. Check rear A/C control unit connector E-20 and 
mode selection damper control motor connector G-22-3 
for damage.

Q: Is rear A/C control unit connector E-20 and mode 

selection damper control motor connector G-22-3 for 
damage in good condition?
YES : Go to Step 11.
NO :  Repair or replace the connector. Refer to GROUP 

00E, Harness Connector Inspection 

P.00E-2

. Check 

that the rear air conditioning works normally.

STEP 11. Check the wiring harness between rear A/C 
control unit connector E-20 (terminal 9, 10 and 11) and 

mode selection damper control motor connector G-22-3 
(terminal 6, 4 and 3).

AC204176

CONNECTOR : E-20

AY

HARNESS SIDE

7

8

3

10 9

2

4

11

1312

5

14

6

1

AC204698

CONNECTOR : G-22-3

AG

HARNESS SIDE

7 6 5 4 3 2 1

AC204176

CONNECTOR : E-20

AY

HARNESS SIDE

7

8

3

10 9

2

4

11

1312

5

14

6

1

AC204698

CONNECTOR : G-22-3

AG

HARNESS SIDE

7 6 5 4 3 2 1

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-110

NOTE: Also check intermediate connector D-112 and rear A/C 
unit connector G-22. If intermediate connector D-112 and rear 
A/C unit connector G-22 is damaged, repair or replace the con-
nector as described in GROUP 00E, Harness Connector 
Inspection 

P.00E-2

.

Q: Is the wiring harness between rear A/C control unit 

connector E-20 (terminal 9, 10 and 11) and mode 
selection damper control motor connector G-22-3 
(terminal 6, 4 and 3) in good condition?
YES : Go to Step 12.
NO :  Repair the wiring harness. Check that the rear air 

conditioning works normally.

STEP 12. Replace the mode selection damper control 
motor connector.
Q: Do the air conditioning work normally?

YES : No action is necessary and testing is complete.
NO :  Replace the rear A/C control unit. Check that the air 

conditioning works normally.

CHECK AT ECU TERMINAL

M1554005400160

AC204171 AL

CONNECTOR : D-112

2 3

27

32

28

33

16

15

4 5

19

18

29

17

34

7 8

35

22

21

9 10

30

36

31

37

25

24

23

6

20

1

14

26

11

13

12

38

AC204179

CONNECTOR : G-22

AP

HARNESS SIDE

1

5

7

8

2

6

10

4

9

3

ACX00820

TERMINAL 
NO.

INSPECTION ITEM

INSPECTION CONDITION

NORMAL 
CONDITION

1

Magnetic valve

Magnetic valve: OFF

Battery positive 
voltage

Magnetic valve: ON

0.5 V

2

Ground

At all times

0 V

3

Input from temperature adjusting 
switch

Temperature switch: MAX HOT

1 V

Temperature switch: MAX COOL

4 V

4

Air mixing damper control motor 
potentiometer power supply

At all times

5 V

5

Power supply (IG2)

Ignition switch: ON

Battery positive 
voltage

Ignition switch: OFF

0 V