Mitsubishi Montero (2002-2004). Manual - part 54

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-79

STEP 8. Measure the voltage at rear blower relay 
connector D-213. 
(1) Disconnect rear blower relay connector D-213, and 

measure the voltage at the junction block side.

(2) Measure the voltage between terminal 5 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 11.
NO :   Go to Step 9.

STEP 9. Check rear blower relay connector D-213 for 
damage.
Q: Is rear blower relay connector D-213 in good condition?

YES : Go to Step 10.
NO :  Repair or replace the connector. Refer to GROUP 

00E, Harness Connector Inspection 

P.00E-2

. The 

blower motor should operate normally.

AC204173

CONNECTOR : D-213

AY

JUNCTION 
BLOCK SIDE

2 1

5

4

3

AC204738

HARNESS SIDE : D-213

CS

2 1

5

4

3

AC204173

CONNECTOR : D-213

AY

JUNCTION 
BLOCK SIDE

2 1

5

4

3

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-80

STEP 10. Check the wiring harness between rear blower 
relay connector D-213 (terminal 5) and the fusible link (2).

NOTE: Also check intermediate connector D-28. If intermediate 
connector D-28 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 blower relay 

connector D-213 (terminal 5) and the fusible link (2) in 
good condition?
YES : The rear blower motor should operate normally.
NO :  Repair the wiring harness. The rear blower motor 

should operate normally.

STEP 11. Measure the resistance at rear blower relay 
connector D-213.
(1) Disconnect connector D-213, and measure the resistance 

at the junction block side. 

(2) Turn the rear fan switch to the "ON" position.
(3) Turn the rear fan control switch to the "OFF" position.

(4) Measure the resistance value between terminal 3 and 

ground.

• Less than 2 ohms

Q: Does the measured resistance value correspond with 

this range?
YES :  Go to Step 20.
NO :   Go to Step 12.

AC204173

CONNECTOR : D-213

AY

JUNCTION 
BLOCK SIDE

2 1

5

4

3

AC204170

CONNECTOR : D-28

AI

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

AC204173

CONNECTOR : D-213

AY

JUNCTION 
BLOCK SIDE

2 1

5

4

3

AC204738 CI

JUNCTION BLOCK SIDE : D-213

2 1

5

4

3

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-81

STEP 12. Measure the resistance at rear fan control switch 
connector E-12.
(1) Disconnect connector E-12, and measure the resistance at 

the wiring harness side. 

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

(3) 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 13.
NO :   Go to Step 15.

STEP 13. Check rear fan switch connector E-12 and rear 
blower relay connector D-213 for damage.
Q: Is rear fan switch connector E-12 and rear blower relay 

connector D-213 in good condition?
YES : Go to Step 14.
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

AC204738 CJ

HARNESS SIDE : E-12

1
4

2

3

5

6

AC204173

CONNECTOR : D-213

AY

JUNCTION 
BLOCK SIDE

2 1

5

4

3

AC204176

CONNECTOR : E-12

AX

HARNESS SIDE

1
4

2

3

5

6

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-82

STEP 14. Check the wiring harness between rear blower 
relay connector D-213 (terminal 3) and rear fan control 
switch connector E-12 ((terminal 1).
NOTE: Also check intermediate connector E-06. If intermediate 
connector E-06 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 blower relay 

connector D-213 (terminal 3) and rear fan control switch 
connector E-12 ((terminal 1) in good condition?
YES : The rear blower motor should operate normally.
NO :  Repair the wiring harness. The rear blower motor 

should operate normally.

AC204173

CONNECTOR : D-213

AY

JUNCTION 
BLOCK SIDE

2 1

5

4

3

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