Mitsubishi Montero (2002-2004). Manual - part 59

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-99

DIAGNOSIS

STEP 1. Check the rear blower switch.
Follow the table below to check the rear blower switch for conti-
nuity.

Q: Is the check result normal? 

YES :  Go to Step 2.
NO :  Replace the rear heater switch <vehicles with rear 

heater>, rear cooler switch <vehicles with rear 
cooler> or rear A/C switch <vehicles with rear A/C>.

STEP 2. Check the resister.
Measure the resistance between the resistor terminals.

Q: Is the check result normal? 

YES :  Go to Step 3.
NO :  Replace the resister.

AC204698 AQ

G-06-1
G-22-1

G-06-2
G-22-2

CONNECTORS : G-06-1, G-06-2, 
G-22-1, G-22-2

BLOWER SWITCH 
POSITION

TESTER 
CONNECTION 

SPECIFIED 
CONDITION

1(LO)

1 

− 4

Less than 2 ohms

2(ME)

1 

− 6

Less than 2 ohms

3(HI)

1 

− 7

Less than 2 ohms

AC205161

1
7

2
8

10 11

5

13

6

14

12

4

9

3

Resistance value 

Ω

TESTER CONNECTION

4.9 

± 0.343

1 

− 6

1.25 

± 0.0875

1 

− 3

AC001039AB

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-100

STEP 3. Check rear blower motor connector G-06-1 
<vehicles with rear heater or rear cooler> or G-22-1 
<vehicles with rear A/C> and rear heater switch connector 
E-21 <vehicles with rear heater> or 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 blower motor connector G-06-1 <vehicles with 

rear heater or rear cooler> or G-22-1 <vehicles with rear 
A/C> and rear heater switch connector E-21 <vehicles 
with rear heater> or 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 4.
NO :  Repair or replace the connector. Refer to GROUP 

00E, Harness Connector Inspection 

P.00E-2

. The 

blower motor should operate normally.

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

AC204699

CONNECTORS :G-06-1, G-22-1

AC

G-06-1
G-22-1

G-06-1

HARNESS SIDE

G-22-1

HARNESS SIDE

<VEHICLES WITH A/C>

<VEHICLES WITHOUT A/C>

1
2

1
2

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-101

STEP 4. Check the wiring harness between rear blower 
motor connector G-06-1 (terminal 1) <vehicles with rear 
heater or rear cooler> or G-22-1 (terminal 1) <vehicles with 
rear A/C> and rear heater switch connector E-21 (terminal 
7) <vehicles with rear heater> or rear cooler switch 
connector E-17 (terminal 7) <vehicles with rear cooler> or 
rear A/C switch connector E-22 (terminal 7) <vehicles with 
rear A/C>.

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

AC204699

CONNECTORS :G-06-1, G-22-1

AC

G-06-1
G-22-1

G-06-1

HARNESS SIDE

G-22-1

HARNESS SIDE

<VEHICLES WITH A/C>

<VEHICLES WITHOUT A/C>

1
2

1
2

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-102

NOTE: Also check rear blower unit connector G-06 <vehicles 
with rear heater or rear cooler> or G-22 <vehicles with rear A/
C>. If rear blower unit connector G-06 <vehicles with rear 
heater or rear cooler> or G-22 <vehicles with rear A/C> is dam-
aged, repair or replace the connector as described in GROUP 
00E, Harness Connector Inspection 

P.00E-2

.

Q: Is the wiring harness between rear blower motor 

connector G-06-1 (terminal 1) <vehicles with rear heater 
or rear cooler> or G-22-1 (terminal 1) <vehicles with rear 
A/C> and rear heater switch connector E-21 (terminal 7) 
<vehicles with rear heater> or rear cooler switch 
connector E-17 (terminal 7) <vehicles with rear cooler> 
or rear A/C switch connector E-22 (terminal 7) <vehicles 
with rear A/C> in good condition?
YES : Go to Step 5.
NO :  Repair the wiring harness. The rear blower motor 

should operate normally.

STEP 5. Check rear blower motor connector G-06-1 
<vehicles with rear heater or rear cooler> or G-22-1 
<vehicles with rear A/C> and blower resistor G-06-2 
<vehicles with rear heater or rear cooler> or G-22-2 
<vehicles with rear A/C> for damage.
Q: Is rear blower motor connector G-06-1 <vehicles with 

rear heater or rear cooler> or G-22-1 <vehicles with rear 
A/C> and blower resistor G-06-2 <vehicles with rear 
heater or rear cooler> or G-22-2 <vehicles with rear A/C> 
in good condition?
YES : Go to Step 6.
NO :  Repair or replace the connector. Refer to GROUP 

00E, Harness Connector Inspection 

P.00E-2

. The 

blower motor should operate normally.

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

AC204699 AB

G-06-1
G-22-1

G-06-2
G-22-2

G-06-1

HARNESS SIDE

G-22-1

HARNESS SIDE

<VEHICLES WITH A/C>

G-06-2

HARNESS SIDE

G-22-2

HARNESS SIDE

1
2

1
4

3
6 5

2

1
2

1
4

3
6 5

2

<VEHICLES WITHOUT A/C>

CONNECTORS : G-06-1, G-06-2, G-22-1, 
G-22-2