Mitsubishi Montero (2002-2004). Manual - part 101

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-97

STEP 7. Measure the voltage at defogger relay connector 
D-216. 
(1) Disconnect defogger relay connector D-216, and measure 

the voltage at the junction block side.

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

(3) Measure the voltage between terminal 1 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 defogger relay connector D-216 for 
damage.
Q: Is defogger relay connector D-216 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 defogger system works normally.

AC204173

CONNECTOR : D-216

BD

JUNCTION BLOCK 
SIDE

1

2

5

4

3

AC204738 DD

JUNCTION BLOCK SIDE : D-216

1

2

5

4

3

AC204173

CONNECTOR : D-216

BD

JUNCTION BLOCK 
SIDE

1

2

5

4

3

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-98

STEP 9. Check the wiring harness between defogger relay 
connector D-216 (terminal 1) and ignition switch (IG2).
NOTE: Also check junction block connector D-208. If junction 
block connector D-208 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 defogger relay connector 

D-216 (terminal 1) and ignition switch in (IG2) good 
condition?
YES : Check that the defogger system works normally.
NO :  Repair the wiring harness. Check that the defogger 

system works normally.

STEP 10. Check defogger relay connector D-216 and 
defogger connector I-03 for damage.
Q: Are defogger relay connector D-216 and defogger 

connector I-03 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 defogger system works normally.

AC204191

JUNCTION BLOCK
(FRONT VIEW)

CONNECTORS : D-208, D-216

D-208

HARNESS SIDE

D-216

RELAY SIDE

AW

D-208

D-216

1

2

5

4

3

1

2

3

5

6

4

AC204173

CONNECTOR : D-216

BD

JUNCTION BLOCK 
SIDE

1

2

5

4

3

AC204182

CONNECTOR : I-03

AK

I-03(B)

1

HARNESS 
SIDE

I-03(B)

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-99

STEP 11. Check the wiring harness between defogger relay 
connector D-216 (terminal 5) and defogger connector I-03 
(terminal 1).

NOTE: Also check junction block connector D-217, intermedi-
ate connectors D-111 and G-10. If junction block connector D-
217, intermediate connector D-111 or G-10 is damaged, repair 
or replace the connector as described in GROUP 00E, Harness 
Connector Inspection 

P.00E-2

.

Q: Is the wiring harness between defogger relay connector 

D-216 (terminal 5) and defogger connector I-03 (terminal 
1) in good condition?
YES : Go to Step 12.
NO :  Repair or replace the wiring harness. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-

2

. Check that the defogger system works normally.

AC204182

CONNECTOR : I-03

AK

I-03(B)

1

HARNESS 
SIDE

I-03(B)

AC204191

JUNCTION BLOCK
(FRONT VIEW)

AC204191

CONNECTORS : D-216, D-217

D-217

D-216

RELAY SIDE

D-216

D-217

HARNESS SIDE

BA

8

1

11 10

3

4

12

9

2

13

14

6 5

15

7

1

2

5

4

3

AC204171

CONNECTOR : D-111

AQ

9

8

6 7

5

3 4

20

32

21

33

43

17 18

30

41

16

29

28

39 40

13

25

12

24

35 36

14

26

37

15

27

38

19

31

42

1

10

22

2

11

23

34

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-100

STEP 12. Check defogger relay connector D-216 and A/C-
ECU connector D-23 for damage.
Q: Are defogger relay connector D-216 and A/C-ECU 

connector D-23 in good condition?
YES : Go to Step 13.
NO :  Repair or replace the connector. Refer to GROUP 

00E, Harness Connector Inspection 

P.00E-2

. Check 

that the defogger system works normally.

AC204170

CONNECTOR : D-23

D-23(B)

D-23(B)

CP

HARNESS 
SIDE

1

3

4

2

12

1413

11

6

7

8

10 9

18

19

20

16

17

5

15

AC204173

CONNECTOR : D-216

BD

JUNCTION BLOCK 
SIDE

1

2

5

4

3