Mitsubishi Montero (2002-2004). Manual — part 40

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-23

STEP 3. Measure the voltage at rear heater control unit
connector E-01 <vehicles with rear heater>, rear cooler
control unit connector E-09 <vehicles with rear cooler> or
rear A/C control unit connector E-20 <vehicles with rear A/
C>.
(1) Disconnect rear heater control unit connector E-01

<vehicles with rear heater> or rear cooler control unit
connector E-09 <vehicles with rear cooler> or rear A/C
control unit connector E-20 <vehicles with rear A/C> and
measure the voltage at the harness side.

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

(3) 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 6.
NO : Go to Step 4.

AC204194

CONNECTORS : E-01, E-09, E-20

AN

E-01,
E-09,
E-20

E-01 <VEHICLES WITH REAR HEATER>
E-09 <VEHICLES WITH REAR COOLER>
E-20 <VEHICLES WITH REAR A/C>

HARNESS SIDE

7

8

3

10 9

2

4

11

1312

5

14

6

1

AC205149

7

8

3

10 9

2

4

11

1312

5

14

6

1

CONNECTOR E-01, E-09, E-20
(HARNESS SIDE)

AB

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-24

STEP 4. Check rear heater control unit connector E-01
<vehicles with rear heater>, rear cooler control unit
connector E-09 <vehicles with rear cooler> or rear A/C
control unit connector E-20 <vehicles with rear A/C> for
damage.
Q: Is rear heater control unit connector E-01 <vehicles with

rear heater>, rear cooler control unit connector E-09
<vehicles with rear cooler> or rear A/C control unit
connector E-20 <vehicles with rear A/C> in good
condition?
YES : Go to Step 5.
NO : Repair or replace the connector. Refer to GROUP

00E, Harness Connector Inspection

P.00E-2

. Check

that the rear air conditioning works normally.

AC204194

CONNECTORS : E-01, E-09, E-20

AN

E-01,
E-09,
E-20

E-01 <VEHICLES WITH REAR HEATER>
E-09 <VEHICLES WITH REAR COOLER>
E-20 <VEHICLES WITH REAR A/C>

HARNESS SIDE

7

8

3

10 9

2

4

11

1312

5

14

6

1

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-25

STEP 5. Check the wiring harness between rear heater
control unit connector E-01 (terminal 5) <vehicles with rear
heater> or rear cooler control unit connector E-09
(terminal 5) <vehicles with rear cooler> or rear A/C control
unit connector E-20 (terminal 5) <vehicles with rear A/C>
and the ignition switch (IG2).

AC204194

CONNECTORS : E-01, E-09, E-20

AN

E-01,
E-09,
E-20

E-01 <VEHICLES WITH REAR HEATER>
E-09 <VEHICLES WITH REAR COOLER>
E-20 <VEHICLES WITH REAR A/C>

HARNESS SIDE

7

8

3

10 9

2

4

11

1312

5

14

6

1

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-26

NOTE: Also check joint connector (6) D-01, junction block con-
nectors D-210 and D-208. If joint connector (6) D-01, junction
block connectors D-210 and D-208 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 5) <vehicles with rear heater>
or rear cooler control unit connector E-09 (terminal 5)
<vehicles with rear cooler> or rear A/C control unit
connector E-20 (terminal 5) <vehicles with rear A/C> and
the ignition switch (IG2) 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.

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