Mitsubishi Montero (2004+). Manual - part 615

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-103

INSPECTION PROCEDURE 7: Air Outlet Vent Output cannot be Changed with Temperature Control 
Switch. <Vehicles with Rear A/C>

Mode Selection Damper Control Motor Circuit

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-104

DIAGNOSIS

STEP 1. Check that the rear air conditioning temperature 
control functions normally.
Q: Does the rear air conditioning temperature control 

function normally?
YES :  Go to Step 2.
NO :  Refer to rear air conditioning diagnosis Inspection 

Procedure 4 "A/C Outlet Air Temperature does not 
Increase <Vehicles with rear A/C> 

P.55A-52

."

AC204170

CONNECTOR : D-01

CX

AC204171

CONNECTOR : D-112

AU

AC204173

CONNECTORS : D-208, D-210

BF

D-208

D-210

AC204176

CONNECTOR : E-20

BG

AC204179

CONNECTOR : G-22

AX

AC204698 AS

CONNECTOR : G-22-3

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-105

STEP 2. Measure the resistance at rear A/C unit connector 
G-22.

(1) Disconnect rear A/C unit connector G-22, and measure at 

the wiring harness side.

(2) Measure the resistance between terminal 3 and ground.

• Less than 2 ohms

Q: Does the measured resistance value correspond with 

this range?
YES :  Go to Step 5.
NO :   Go to Step 3.

STEP 3. Check rear A/C unit connector G-22 for damage.

Q: Is rear A/C unit connector G-22 in good condition?

YES : Go to Step 4.
NO :  Repair or replace the connector. Refer to GROUP 

00E, Harness Connector Inspection 

P.00E-2

. Check 

that the air conditioning works normally.

STEP 4. Check the wiring harness between rear A/C unit 
connector G-22 (terminal 3) and ground.

Q: Is the wiring harness between rear A/C unit connector 

G-22 (terminal 3) and ground 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.

AC204179

CONNECTOR : G-22

AP

HARNESS SIDE

1

5

7

8

2

6

10

4

9

3

AC204738 CN

HARNESS SIDE : G-22

1

5

7

8

2

6

10

4

9

3

AC204179

CONNECTOR : G-22

AP

HARNESS SIDE

1

5

7

8

2

6

10

4

9

3

AC204179

CONNECTOR : G-22

AP

HARNESS SIDE

1

5

7

8

2

6

10

4

9

3

REAR AIR CONDITIONING DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-106

STEP 5. Measure the voltage at rear A/C unit connector 
G-22. 

(1) Disconnect rear A/C unit connector G-22, and measure the 

voltage at the harness side.

(2) Measure the voltage between terminal 4 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 A/C unit connector G-22 for damage.

Q: Is rear A/C unit connector G-22 in good condition?

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

00E, Harness Connector Inspection 

P.00E-2

. Check 

that the rear air conditioning works normally.

STEP 7. Check the wiring harness between rear A/C unit 
connector G-22 (terminal 4) and the ignition switch (IG2).

AC204179

CONNECTOR : G-22

AP

HARNESS SIDE

1

5

7

8

2

6

10

4

9

3

AC204738

HARNESS SIDE : G-22

CT

1

5

7

8

2

6

10

4

9

3

AC204179

CONNECTOR : G-22

AP

HARNESS SIDE

1

5

7

8

2

6

10

4

9

3

AC204179

CONNECTOR : G-22

AP

HARNESS SIDE

1

5

7

8

2

6

10

4

9

3