Mitsubishi Montero (2004+). Manual — part 643

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-61

STEP 15. Check the temperature adjustment switch.

Follow the table below to check the temperature adjustment
switch for continuity.

TEMPERATURE
ADJUSTMENT
SWITCH POSITION

TESTER
CONNECTION

SPECIFIED
CONDITION

1

7

− 10

Less than 2 ohms

2

7

− 8, 7 − 10

Less than 2 ohms

3

7

− 8

Less than 2 ohms

4

6

− 7, 7 − 8

Less than 2 ohms

5

6

− 7, 7 − 8, 7 − 10 Less than 2 ohms

6

6

− 7, 7 − 10

Less than 2 ohms

7

6

− 7

Less than 2 ohms

8

4

− 7, 6 − 7

Less than 2 ohms

9

4

− 7, 6 − 7, 7 − 10

Less than 2 ohms

10

4

− 7, 6 − 7, 7 − 8, 7

− 10

Less than 2 ohms

11

4

− 7, 6 − 7, 7 − 8

Less than 2 ohms

12

4

− 7, 7 − 8

Less than 2 ohms

13

4

− 7, 7 − 8, 7 − 10 Less than 2 ohms

14

4

− 7, 7 − 10

Less than 2 ohms

15

4

− 7

Less than 2 ohms

16

2

− 7, 4 − 7

Less than 2 ohms

17

2

− 7, 4 − 7, 7 − 10

Less than 2 ohms

18

2

− 7, 4 − 7, 7 − 8, 7

− 10

Less than 2 ohms

19

2

− 7, 4 − 7, 7 − 8

Less than 2 ohms

20

2

− 7, 4 − 7, 6 − 7, 7

− 8

Less than 2 ohms

21

2

− 7, 4 − 7, 6 − 7, 7

− 8, 7 − 10

Less than 2 ohms

22

2

− 7, 4 − 7, 6 − 7, 7

− 10

Less than 2 ohms

23

2

− 7, 4 − 7, 6 − 7

Less than 2 ohms

24

2

− 7, 6 − 7

Less than 2 ohms

25

2

− 7, 6 − 7, 7 − 10

Less than 2 ohms

26

2

− 7, 6 − 7, 7 − 8, 7

− 10

Less than 2 ohms

27

2

− 7, 6 − 7, 7 − 8

Less than 2 ohms

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

AB

AC205259

1

2

29

28

27

26

25

24

23

22

21

20

19

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

AB

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-62

Q: Is the check result normal?

YES : Replace the A/C-ECU (Refer to

P.55B-142

). The

temperature control should work normally.

NO : Replace the automatic air conditioning control panel.

The temperature control should work normally.

28

2

− 7, 7 − 8

Less than 2 ohms

29

2

− 7, 7 − 8, 7 − 10 Less than 2 ohms

TEMPERATURE
ADJUSTMENT
SWITCH POSITION

TESTER
CONNECTION

SPECIFIED
CONDITION

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-63

INSPECTION PROCEDURE 4: Blower does not Operate.

Blower Motor Circuit

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-64

.

TECHNICAL DESCRIPTION (COMMENT)
If the blower fan and motor does not turn when the
blower switch is operated, the blower motor circuit
may be defective.

.

TROUBLESHOOTING HINTS

• Malfunction of the front blower relay

• Malfunction of the heater blower controller unit

• Malfunction of the flexible flat cable

• Malfunction of the blower motor

• Malfunction of the automatic air-conditioning con-

trol panel

• Damaged harness wires or connectors

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B (Vehicles without

CAN communication system)

AC204171 BC

D-17 D-113

CONNECTORS : D-17, D-113

AC204170

CONNECTORS : D-23, D-28

DW

D-28

D-23(B)

AC204173

CONNECTORS : D-208, D-209, D-211, D-218

BH

D-208

D-218

D-209

D-211(B)