Mitsubishi Montero (2004+). Manual — part 609

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-79

STEP 15. Measure the resistance at rear heater switch
connector E-21 <vehicles with rear heater>, rear cooler
switch connector E-17 <vehicles with rear cooler> or rear
A/C switch connector E-22 <vehicles with rear A/C>.

(1) Disconnect connector E-21 or E-17 or E-22 and measure

the resistance at the wiring harness side.

(2) Measure the resistance value between terminal 2 and

ground.

• Less than 2 ohms

Q: Does the measured resistance value correspond with

this range?
YES : Go to Step 16.
NO : Go to Step 18.

AC204193

CONNECTORS : E-17, E-21, E-22

AC

E-17, E-21, E-22

E-17 <VEHICLES WITH REAR COOLER>
E-21 <VEHICLES WITH REAR HEATER>
E-22 <VEHICLES WITH REAR A/C>

HARNESS SIDE

1
7

2
8

10

11

5

13

6

14

12

4

9

3

AC204738 CK

HARNESS SIDE : E-17, E-21, E-22

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-80

STEP 16. Check rear fan control switch connector E-12
and rear heater switch connector E-21 <vehicles with rear
heater>, rear cooler switch connector E-17 <vehicles with
rear cooler> or rear A/C switch connector E-22 <vehicles
with rear A/C> for damage.

Q: Is rear fan control switch connector E-12 and rear

heater switch connector E-21 <vehicles with rear
heater>, rear cooler switch connector E-17 <vehicles
with rear cooler> or rear A/C switch connector E-22
<vehicles with rear A/C> in good condition?
YES : Go to Step 17.
NO : Repair or replace the connector. Refer to GROUP

00E, Harness Connector Inspection

P.00E-2

. The

blower motor should operate normally.

AC204176

CONNECTOR : E-12

AX

HARNESS SIDE

1
4

2

3

5

6

AC204193

CONNECTORS : E-17, E-21, E-22

AC

E-17, E-21, E-22

E-17 <VEHICLES WITH REAR COOLER>
E-21 <VEHICLES WITH REAR HEATER>
E-22 <VEHICLES WITH REAR A/C>

HARNESS SIDE

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-81

STEP 17. Check the wiring harness between rear fan
control switch connector E-12 (terminal 2) and rear heater
switch connector E-21 (terminal 8) <vehicles with rear
heater>, rear cooler switch connector E-17 (terminal 8)
<vehicles with rear cooler> or rear A/C switch connector
E-22 (terminal 8) <vehicles with rear A/C>.

AC204194

CONNECTORS : E-06, E-12

AO

E-06

E-06

E-12

E-12

HARNESS SIDE

1
4

2

3

5

6

22

2021

10

9

8

1718

6 7

19

1415

4 5

1112

1 2 3

13

16

AC204193

CONNECTORS : E-17, E-21, E-22

AC

E-17, E-21, E-22

E-17 <VEHICLES WITH REAR COOLER>
E-21 <VEHICLES WITH REAR HEATER>
E-22 <VEHICLES WITH REAR A/C>

HARNESS SIDE

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-82

NOTE: Also check intermediate connector E-06 and D-112. If
intermediate connector E-06 or D-112 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 fan control switch

connector E-12 (terminal 2) and rear heater switch
connector E-21 (terminal 8) <vehicles with rear heater>,
rear cooler switch connector E-17 (terminal 8) <vehicles
with rear cooler> or rear A/C switch connector E-22
(terminal 8) <vehicles with rear A/C> in good condition?
YES : The rear blower motor should operate normally.
NO : Repair the wiring harness. The rear blower motor

should operate normally.

STEP 18. Check rear heater switch connector E-21
<vehicles with rear heater>, rear cooler switch connector
E-17 <vehicles with rear cooler> or rear A/C switch
connector E-22 <vehicles with rear A/C> for damage.

Q: Is rear heater switch connector E-21 <vehicles with rear

heater>, rear cooler switch connector E-17 <vehicles
with rear cooler> or rear A/C switch connector E-22
<vehicles with rear A/C> in good condition?
YES : Go to Step 19.
NO : Repair or replace the connector. Refer to GROUP

00E, Harness Connector Inspection

P.00E-2

. The

blower motor should operate 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

AC204193

CONNECTORS : E-17, E-21, E-22

AC

E-17, E-21, E-22

E-17 <VEHICLES WITH REAR COOLER>
E-21 <VEHICLES WITH REAR HEATER>
E-22 <VEHICLES WITH REAR A/C>

HARNESS SIDE

1
7

2
8

10

11

5

13

6

14

12

4

9

3