Mitsubishi Montero (2004+). Manual — part 607

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-71

DIAGNOSIS

STEP 1. Check the rear blower relay continuity.

Follow the table below to check the rear blower relay for conti-
nuity.

Q: Is the rear blower relay continuity in good condition?

YES : Go to Step 2.
NO : Replace the rear blower relay. The rear blower motor

should operate normally.

STEP 2. Check the rear fan switch.

Follow the table below to check the rear fan switch for continu-
ity.

Q: Is the check result normal?

YES : Go to Step 3.
NO : Replace the rear fan switch.

STEP 3. Check the rear fan control switch.

Follow the table below to check the rear fan control switch for
continuity.

Q: Is the check result normal?

YES : Go to Step 4.
NO : Replace the rear fan control switch.

BATTERY VOLTAGE

TESTER
CONNECTION

SPECIFIED
CONDITION

Not applied

4

− 5

Open circuit

• Connect terminal 1

to the positive
battery terminal

• Connect terminal 3

to the negative
battery terminal

4

− 5

Less than 2 ohms

AC002644AB

REAR BLOWER RELAY

REAR FAN
SWITCH
POSITION

TESTER
CONNECTION

SPECIFIED
CONDITION

OFF

8

− 9

Less than 2 ohms

ON (while pushing) 2

− 8

Less than 2 ohms

AC205161

1
7

2
8

10 11

5

13

6

14

12

4

9

3

REAR FAN
CONTROL SWITCH
POSITION

TESTER
CONNECTION

SPECIFIED
CONDITION

OFF

1

− 2

Less than 2 ohms

ON

2

− 5

Less than 2 ohms

AC001045 AB

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-72

STEP 4. Measure the voltage at rear blower unit connector
G-06 <vehicles with rear heater or rear cooler> or G-22
<vehicles with rear A/C>.

(1) Disconnect rear blower unit connector G-06 <vehicles with

rear heater or rear cooler> or G-22 <vehicles with rear

A/C>, and measure the voltage at the wiring harness side.

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

(3) Measure the voltage between terminal 7 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 22.
NO : Go to Step 5.

AC204197

CONNECTORS : G-06, G-22

AB

G-06

G-22

G-06

HARNESS SIDE

G-22

HARNESS SIDE

1

5

7

8

2

6

10

4

9

3

1

5

7

8

2

6

10

4

9

3

AC204738

HARNESS SIDE : G-06, G-22

CQ

1

5

7

8

2

6

10

4

9

3

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-73

STEP 5. 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) 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 8.
NO : Go to Step 6.

STEP 6. Check rear blower relay connector D-213 for
damage.

Q: Is rear blower relay connector D-213 in good condition?

YES : Go to Step 7.
NO : Repair or replace the connector. Refer to GROUP

00E, Harness Connector Inspection

P.00E-2

. The

blower motor should operate normally.

STEP 7. Check the wiring harness between rear blower
relay connector D-213 (terminal 1) and the ignition switch

(IG2).

AC204173

CONNECTOR : D-213

AY

JUNCTION
BLOCK SIDE

2 1

5

4

3

AC204738

JUNCTION BLOCK SIDE : D-213

CR

2 1

5

4

3

AC204173

CONNECTOR : D-213

AY

JUNCTION
BLOCK SIDE

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-74

NOTE: Also check joint connector (6) D-01, junction block con-
nectors D-208 and D-210. If joint connector (6) D-01, junction
block connectors D-208 or D-210 is damaged, repair or replace
the connector as described in GROUP 00E, Harness Connec-
tor Inspection

P.00E-2

.

Q: Is the wiring harness between rear blower relay

connector D-213 (terminal 1) and the ignition switch
(IG2) in good condition?
YES : The rear blower motor should operate normally.
NO : Repair the wiring harness. The rear blower motor

should operate normally.

AC204170

CONNECTOR: D-01

AB

9 10

8

6 7

31 32

30

29

18 19 20 21

5

4

2

1

3

27

26

24

23

25

12 13 14 15 16 17

28

11
22
33

AC204191

CONNECTORS: D-208, D-210

D-208

AC

HARNESS SIDE

HARNESS SIDE

D-210

D-208

D-210

1

2

3

5

6

4

1

2

7 6

3

9

4

11

12

10

13

5

8