Mitsubishi Montero (2002-2004). Manual - part 94

 

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Mitsubishi Montero (2002-2004). Manual - part 94

 

 

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-69

STEP 13. Check the wiring harness between front blower 
relay connector D-218 (terminal 5) and blower motor 
connector D-113 (terminal 1).
NOTE: Also check junction block connector D-208. If junction 
block connector D-208 is damaged, repair or replace the con-
nector as described in GROUP 00E, Harness Connector 
Inspection 

P.00E-2

.

Q: Is the wiring harness between front blower relay 

connector D-218 (terminal 5) and blower motor 
connector D-113 (terminal 1) in good condition?
YES : 
Replace the A/C-ECU. (Refer to 

P.55B-136

.) The 

blower motor should operate normally.

NO :  Repair the wiring harness. The blower motor should 

operate normally.

STEP 14. Check the blower motor.
Confirm whether the motor operates normally when the battery 
voltage is applied between the blower motor terminals.
Q: Is the check result normal?

YES : Go to Step 15.
NO :   Replace the blower motor. The blower motor should 

operate normally.

AC204171

CONNECTOR : D-113

AR

HARNESS 
SIDE

1

2

AC204191

JUNCTION BLOCK
(FRONT VIEW)

AC204191

CONNECTORS : D-208, D-218

D-208

HARNESS SIDE

D-218

RELAY SIDE

AT

D-208

D-218

1

2

3

5

6

4

1

2

5

4

3

AC001038 AB

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-70

STEP 15. Measure the voltage at heater blower controller 
unit connector D-17. 
(1) Disconnect heater blower controller unit connector D-17, 

and measure the voltage at the wiring harness side.

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

(4) Measure the voltage between terminal 2 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 18.
NO :   Go to Step 16.

STEP 16. Check heater blower controller unit connector D-
17 for damage.
Q: Is heater blower controller unit D-17 in good condition?

YES : Go to Step 17.
NO :  Repair or replace the connector. Refer to GROUP 

00E, Harness Connector Inspection 

P.00E-2

. The 

blower motor should operate normally.

AC204171

CONNECTOR : D-17

AP

1

2

3

4

HARNESS 
SIDE

AC204738 DA

HARNESS SIDE : D-17

1

2

3

4

AC204171

CONNECTOR : D-17

AP

1

2

3

4

HARNESS 
SIDE

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-71

STEP 17. Check the wiring harness between front blower 
relay connector D-218 (terminal 5) and heater blower 
controller unit connector D-17 (terminal 2).

NOTE: Also check junction block connector D-208. If junction 
block connector D-208 is damaged, repair or replace the con-
nector as described in GROUP 00E, Harness Connector 
Inspection 

P.00E-2

.

Q: Is the wiring harness between front blower relay 

connector D-218 (terminal 5) and heater blower 
controller unit connector D-17 (terminal 2) in good 
condition?
YES : 
The blower motor should operate normally.
NO :  Repair the wiring harness. The blower motor should 

operate normally.

AC204171

CONNECTOR : D-17

AP

1

2

3

4

HARNESS 
SIDE

AC204173

CONNECTOR : D-218

BE

JUNCTION BLOCK
SIDE

1

2

5

4

3

AC204173

CONNECTOR : D-208

HARNESS SIDE

AC

1

2

3

5

6

4

D-208

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-72

STEP 18. Measure the resistance at heater blower 
controller unit connector D-17.
(1) Disconnect heater blower controller unit connector D-17, 

and measure the resistance at the wiring harness side.

(2) Measure the resistance value between terminal 4 and 

ground.

• 2 ohms or less

Q: Does the measured resistance value correspond with 

this range?
YES : 
 Go to Step 21.
NO :   Go to Step 19.

STEP 19. Check heater blower controller unit connector D-
17 for damage.
Q: Is heater blower controller unit connector D-17 in good 

condition?
YES : 
Go to Step 20.
NO :  Repair or replace the connector. Refer to GROUP 

00E, Harness Connector Inspection 

P.00E-2

. The 

blower motor should operate normally.

STEP 20. Check the wiring harness between heater blower 
controller unit connector D-17 (terminal 4) and ground.
Q: Is the wiring harness between heater blower controller 

unit connector D-17 (terminal 4) and ground in good 
condition?
YES : 
No action to be taken.
NO :  Repair the wiring harness. The blower motor should 

operate normally.

AC204171

CONNECTOR : D-17

AP

1

2

3

4

HARNESS 
SIDE

AC204738

HARNESS SIDE : D-17

DL

1

2

3

4

AC204171

CONNECTOR : D-17

AP

1

2

3

4

HARNESS 
SIDE

AC204171

CONNECTOR : D-17

AP

1

2

3

4

HARNESS 
SIDE

 

 

 

 

 

 

 

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