Mitsubishi Galant 9G. Manual — part 260

MANUAL A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-116

STEP 5. Check the outside/inside air selection damper
control motor.

CAUTION

Cut off the battery voltage when the damper is in the
inside/outside air position.
Check the outside/inside air selection damper control motor by
the following procedures.

Q: Does outside/inside air selection damper control motor

work normally?
YES : Go to Step 6.
NO : Replace the outside/inside air selection damper

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

STEP 6. Check A/C-ECU C-09 for loose, corroded or
damaged terminals, or terminals pushed back in the
connector.
Q: Is A/C-ECU C-09 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 outside/inside air selection damper control
motor works normally.

LEVER POSITION BATTERY

CONNECTION

LEVER
OPERATION

At the outside
position

• Connect

terminal 1 to the
positive battery
terminal

• Connect

terminal 5 to the
negative battery
terminal

The lever moves
from the outside
position to the
inside position

At the inside
position

• Connect

terminal 1 to the
positive battery
terminal

• Connect

terminal 4 to the
negative battery
terminal

The lever moves
from the inside
position to the
outside position

AC206298

OUTSIDE POSITION

INSIDE POSITION

AB

3

1 2

4 5

AC305233

C-09 (B)

HARNESS SIDE

21

22

23

24

25

26

27

28

29

30

31

32

BB

CONNECTOR: C-09

MANUAL A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-117

STEP 7. Check the wiring harness between outside/inside
air selection damper control motor connector C-106
(terminals 4 and 5) and A/C-ECU C-09 (terminals 28 and
29).
Q: Are the wiring harness between outside/inside air

selection damper control motor connector C-106
(terminals 4 and 5) and A/C-ECU C-09 (terminals 28 and
29) in good condition?
YES : Go to Step 8.
NO : Repair the wiring harness. Check that the

outside/inside air selection damper control motor
works normally.

STEP 8. Retest the system.
Q: Does a malfunction take place again?

YES : Replace the A/C-ECU, and check that the

outside/inside air selection damper control motor
works normally.

NO : It can be assumed that this malfunction is intermittent.

Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

− How to

Cope with Intermittent Malfunctions

P.00-14

.

AC305234

CONNECTORS: C-09, C-106

C-106

C-09 (B)

HARNESS SIDE

C-09

HARNESS SIDE

C-106

21

22

23

24

25

26

27

28

29

30

31

32

AM

MANUAL A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-118

INSPECTION PROCEDURE 4: When the A/C is Operating, Temperature Inside the Passenger
Compartment does not Decrease (Cool Air is not Emitted).

IGNITION
SWITCH (IG2)

BATTERY

RELAY
BOX

A/C
REFRIGERANT
TEMPERATURE
SWITCH

A/C
COMPRESSOR
ASSEMBLY

A/C-ECU

POWERTRAIN
CONTROL
MODULE

JOINT
CONNECTOR
(1)

JUNCTION
BLOCK

A/C
COMPRESSOR
CLUTCH RELAY

A/C
COMPRESSOR
CLUTCH

A/C Compressor Circuit

MANUAL A/C DIAGNOSIS

TSB Revision

HEATER, AIR CONDITIONING AND VENTILATION

55A-119

AC305210

CONNECTOR: A-13

AS

A-13 (GR)

AC305977AK

CONNECTOR: B-18X

AC305216

CONNECTOR: B-21 <2.4L>

AB

B-21 (B)

AC305214

B-28 (B)

AC

CONNECTOR: B-28 <2.4L>

AC305229AC

B-21 (B)

CONNECTOR: B-21 <3.8 L>

AC305218

B-28 (B)

AC

CONNECTOR: B-28 <3.8 L>

AC305231

CONNECTOR: C-01

AY

AC305233

C-09 (B)

C-23

BM

CONNECTORS: C-09, C-23