Mitsubishi Montero (2002-2004). Manual - part 45

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-43

STEP 5. Check rear cooler control unit connector E-09 and 
rear cooler switch E-17 for damage.
Q: Is rear cooler control unit connector E-09 and rear 

cooler switch E-17 in good condition?
YES : Go to Step 6.
NO :  Repair or replace the connector. Refer to GROUP 

00E, Harness Connector Inspection 

P.00E-2

. Check 

that the rear air conditioning works normally.

AC204176

CONNECTOR : E-09

AW

7

8

3

10 9

2

4

11

1312

5

14

6

1

HARNESS SIDE

AC204175

CONNECTOR : E-17

AE

HARNESS SIDE

FLOOR 
COSOLE

1
7

2
8

10

11

5

13

6

14

12

4

9

3

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-44

STEP 6. Check the wiring harness between rear cooler 
control unit connector E-09 (terminal 3, 4 and 8) and rear 
cooler switch connector E-17 (terminal 5, 3 and 13).

NOTE: Also check intermediate connector D-112. If intermedi-
ate connector D-112 is damaged, repair or replace the connec-
tor as described in GROUP 00E, Harness Connector 
Inspection 

P.00E-2

.

Q: Is the wiring harness between rear cooler control unit 

connector E-09 (terminal 3, 4 and 8) and rear cooler 
switch connector E-17 (terminal 5, 3 and 13) in good 
condition?
YES : Go to Step 7.
NO :  Repair the wiring harness. Check that the rear air 

conditioning works normally.

AC204176

CONNECTOR : E-09

AW

7

8

3

10 9

2

4

11

1312

5

14

6

1

HARNESS SIDE

AC204175

CONNECTOR : E-17

AE

HARNESS SIDE

FLOOR 
COSOLE

1
7

2
8

10

11

5

13

6

14

12

4

9

3

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

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-45

STEP 7. Measure the voltage at rear cooler unit connector 
G-13. 
(1) Disconnect rear cooler unit connector G-13, and measure 

the voltage at the harness side.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal 2 and ground.

• The measured value should be approximately 12 volts 

(battery positive voltage).

Q: Does the measured voltage correspond with this range?

YES :  Go to Step 10.
NO :   Go to Step 8.

STEP 8. Check rear cooler unit connector G-13 for 
damage.
Q: Is rear cooler unit connector G-13 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.

AC204179

CONNECTOR : G-13

AO

HARNESS SIDE

1

2

3

4

AC204738

HARNESS SIDE : G-13

CO

1

2

3

4

AC204179

CONNECTOR : G-13

AO

HARNESS SIDE

1

2

3

4

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-46

STEP 9. Check the wiring harness between rear cooler unit 
connector G-13 (terminal 2) and the ignition switch (IG2).

AC204179

CONNECTOR : G-13

AO

HARNESS SIDE

1

2

3

4