Mitsubishi Montero (2002-2004). Manual — part 43

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-35

STEP 7. Check the air mixing damper control motor and
potentiometer

CAUTION

Do not apply battery voltage when the damper is in the
MAX HOT/MAX COOL position.
Check the air mixing damper control motor by the following pro-
cedures.

When checking the air mixing damper control motor, measure
the resistance value between the terminals 3 and 5, between
the terminals 3 and 7. At this time, make sure that the mea-
sured resistance value changes slowly within the standard
value.

Standard value: 1.2

− 4.8 kΩ

Q: Does air mixing damper control motor work normally?

YES : Go to Step 8.
NO : Replace the air mixing damper control motor. Check

that the rear air conditioning works normally.

LEVER POSITION BATTERY

CONNECTION

LEVER
OPERATION

At the MAX COOL
position

• Connect

terminal 1 to the
positive battery
terminal

• Connect

terminal 2 to the
negative battery
terminal

The lever moves
from the MAX
COOL position to
the MAX HOT
position

At the MAX HOT
position

• Connect

terminal 2 to the
positive battery
terminal

• Connect

terminal 1 to the
negative battery
terminal

The lever moves
from the MAX HOT
position to the MAX
COOL position

AC001049AB

MAX HOT POSITION

MAX
COOL
POSITION

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-36

STEP 8. Check rear heater control unit connector E-01 and
air mixing damper control motor and potentiometer G-25-2
for damage.
Q: Is rear heater control unit connector E-01 and air mixing

damper control motor and potentiometer G-25-2 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.

AC204176

CONNECTOR : E-01

AU

HARNESS SIDE

7

8

3

10 9

2

4

11

1312

5

14

6

1

AC204698

CONNECTOR : G-25-2

AI

HARNESS SIDE

7 6 5 4 3 2 1

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-37

STEP 9. Check the wiring harness between rear heater
control unit connector E-01 (terminal 14, 6, 4, 7 and 8) and
air mixing damper control motor and potentiometer G-25-2
(terminal 2, 1, 5, 3 and 7).

AC204176

CONNECTOR : E-01

AU

HARNESS SIDE

7

8

3

10 9

2

4

11

1312

5

14

6

1

AC204699

CONNECTORS : G-25-1, G-25-2

AK

G-25-2

G-25-2

G-25-1

G-25-1

HARNESS SIDE

7 6 5 4 3 2 1

8

4

7

3

5

1

6

2

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-38

NOTE: Also check intermediate connectors G-25-1, D-112,
rear heater unit connectors G-25 and G-23. If intermediate con-
nector G-25-1, D-112, rear heater unit connector G-25 or G-23
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 heater control unit

connector E-01 (terminal 14, 6, 4, 7 and 8) and air mixing
damper control motor and potentiometer G-25-2
(terminal 2, 1, 5, 3 and 7) 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.

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

AC204197

CONNECTORS : G-23, G-25
<VEHICLES WITH HEATER>

AC

G-23

G-25

G-23

HARNESS SIDE

G-25

HARNESS SIDE

1

2

3

4

2

4 3

1