Mitsubishi Montero (2004+). Manual — part 650

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-89

INSPECTION PROCEDURE 7: Inside/Outside Air Changeover is not Possible.

Outside/Inside Air changeover Damper Motor Citcuit

AC204170

CONNECTORS : D-01, D-23

DS

D-23(B)

D-01

AC204171 AY

D-20

CONNECTOR : D-10

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-90

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B (Vehicles without

CAN communication system)

STEP 1. Using scan tool MB991958, check actuator test
item 13 and item 14: Outside/inside air selection damper
control motor.

CAUTION

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
Carry out the actuator test.
Item 13 and 14: outside/inside air selection damper control
motor
Q: Does the check result show outside air (actuator test

item number: 13) or inside air (actuator test number:
14)?
YES : Got to Step 8.
NO : Go to Step 2.

AC204173

CONNECTORS : D-208, D-210

BF

D-208

D-210

AC307591 AB

MB991911

DATA LINK

CONNECTOR

MB991824

MB991827

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-91

STEP 2. Check the outside/inside air selection damper
control motor.

CAUTION

Disconnect the battery negative terminal when the damper
is in the inside/outside air position.
Check the outside/inside air selection damper control motor by
the following procedures.

Q: Is the check result normal?

YES : Got to Step 3.
NO : Replace the inside air/outside air changeover

damper motor. Check that the outside/inside air
selection damper control motor works normally.

LEVER POSITION BATTERY

CONNECTION

LEVER
OPERATION

At the inside air
position

• Connect

terminal 1 to the
positive battery
terminal

• Connect

terminal 2 to the
negative battery
terminal

The lever moves
from the inside air
position to the
outside air position

At the outside air
position

• Connect

terminal 1 to the
positive battery
terminal

• Connect

terminal 3 to the
negative battery
terminal

The lever moves
from the outside air
position to the
inside air position

2 3

1

AC001041AB

OUTSIDE
AIR

INSIDE AIR

AUTO A/C DIAGNOSIS

TSB Revision

AUTOMATIC AIR CONDITIONING

55B-92

STEP 3. Measure the voltage at outside/inside air selection
damper control motor connector D-10.

(1) Disconnect outside/inside air selection damper control

motor connector D-10, and measure the voltage at the
harness 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 6.
NO : Go to Step 4.

STEP 4. Check outside/inside air selection damper control
motor connector D-10 for damage.

Q: Is outside/inside air selection damper control motor

connector D-10 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 outside/inside air changeover damper control
motor works normally.

STEP 5. Check the wiring harness between outside/inside
air selection damper control motor connector D-10
(terminal 1) and the ignition switch (IG2).

AC204171

CONNECTOR : D-10

AO

HARNESS SIDE

1

3 2

AC204738 CZ

HARNESS SIDE : D-10

1

3 2

AC204171

CONNECTOR : D-10

AO

HARNESS SIDE

1

3 2

AC204171

CONNECTOR : D-10

AO

HARNESS SIDE

1

3 2