Mitsubishi Lancer Evolution VI. Manual - part 126

FULL-AUTOMATIC AIR CONDITIONER – 

Troubleshooting / 
On-vehicle Service

55-56

Terminal
No.

Normal condition

Check condition

Check item

25

Air mix damper motor (MAX. HOT)

When damper is moved to MAX.
COOL position

Almost no voltage 
(0.5 V)

When damper is moved to MAX. HOT
position

10 V

26

Inside/outside air changeover damper
motor (Outside)

When switch is set to inside air
position

10 V

When switch is set to outside air
position

Almost no voltage 
(0.5 V)

28

IG

2

 power supply

When ignition switch is ON

System voltage

29

Earth

At all times

Continuity

30

ILL power supply

When lighting switch is at ON

System voltage

34

A/C output

When A/C is OFF

0 V

When A/C is ON

System voltage

35

Earth

At all times

Continuity

ON-VEHICLE SERVICE

REFRIGERANT CHARGING, LEVEL CHECK,
ADDITION AND REMOVAL, PERFORMANCE
TEST, DUAL PRESSURE SWITCH SIMPLE
CHECK

Follow the same procedures as for the heater and manual
air conditioner. (Refer to P.55-6.)

FULL-AUTOMATIC AIR CONDITIONER – 

On-vehicle Service

55-57

POWER RELAY CHECK

Follow the same procedures as for the heater and manual
air conditioner except for the following. (Refer to P.55-13.)

BLOWER HIGH SPEED RELAY

Battery voltage

Terminal No.

1

2

3

4

Power is not supplied

Power is supplied

IDLE-UP OPERATION CHECK

The idle-up inspection procedures are the same as for the
heater and manual air conditioner. (Refer to P.55-14.)

<Idle speed>
Standard value: 750 

±

 50 r/min

<Idle-up speed>
Standard value: 850 

±

 50 r/min

NOTE
If the idling speed is not within the standard value range,
adjust it.

Blower high speed relay

FULL-AUTOMATIC AIR CONDITIONER – 

Damper Control Motor Assembly
and Power Transistor

55-58

DAMPER CONTROL MOTOR ASSEMBLY AND POWER
TRANSISTOR

REMOVAL AND INSTALLATION

1

2

3

4

5

6

7

Inside/outside air changeover
damper motor removal steps

D

Glove box, glove box frame

1. Linkage connection
2. Inside/outside air changeover

damper motor

Air outlet port changeover damper
motor removal steps

D

Instrument lower panel

3. Linkage connection
4. Air outlet port changeover damper

motor

Air mix damper motor removal
steps

D

Front floor console, console side cover

5. Linkage connection
6. Air mix damper motor

Power transistor removal steps

D

Glove box, glove box frame

7. Power transistor

FULL-AUTOMATIC AIR CONDITIONER – 

Damper Control Motor Assembly
and Power Transistor

55-59

INSPECTION

INSIDE/OUTSIDE CHANGEOVER DAMPER MOTOR
CHECK

Battery connection 
terminal

Lever operation

1

2

Moves to the outside air position

Moves to the inside air position

Caution
Cut off the battery voltage when the lever is in the stop
position.

AIR MIX DAMPER MOTOR CHECK

Motor

Battery connection 
terminal

Lever operation

1

3

Moves to COOL position

Moves to HOT position

Caution
Cut off the battery voltage when the lever is in the stop
position.

Potentiometer

Check to ensure that the resistance value changes gradually
within the standard value range when the resistance value
is measured between connector terminals 2 and 5 or between
5 and 6 with the above inspection condition unchanged.

Standard value: Approx. 0.18 – 4.82 k

Ω