Mitsubishi Outlander (2003+). Manual — part 539

ON-VEHICLE SERVICE

HEATER, AIR CONDITIONER AND VENTILATION

55A-51

ON-VEHICLE SERVICE

SIGHT GLASS REFRIGERANT LEVEL
TEST

M1552008400345

1. Start the engine.
2. Operate the air-conditioner, and then set the

temperature to maximum cooling.

3. Hold the engine speed at 1500 r/min.

4. Check the refrigerant level (bubble state) through

the sight glass.

CAUTION

Use the low-pressure service valve.

NOTE:
(1) If insufficient, replenish the refrigerant as

follows.
a. Replenish until bubbles disappear from the

sight glass.

b. After the bubbles disappear from the sight

glass, replenish 100 g of refrigerant.

(2) If excessive, replenish the refrigerant as

follows.
a. Drain the refrigerant until bubbles can be

seen through the sight glass.

b. Replenish until bubbles disappear from the

sight glass.

c. After the bubbles disappear from the sight

glass, replenish 100 g of refrigerant.

MAGNETIC CLUTCH TEST

M1552008500386

1. Disconnect the magnetic clutch connector to the

magnetic clutch.

2. Connect positive battery voltage directly to the

connector for the magnetic clutch.

3. If the magnetic clutch is normal, there will be a

"click." If the pulley and armature do not make
contact ("click"), there is a malfunction.

COMPRESSOR DRIVE BELT
ADJUSTMENT

M1552001000380

•

<2000> Refer to GROUP 11A, On-vehicle
Service

−

Drive Belt Tension Check

P.11A-8

.

•

<2400> Refer to GROUP 11C, On-vehicle
Service

−

Drive Belt Tension Check

P.11C-8

.

SIMPLE INSPECTION OF THE A/C
PRESSURE SENSOR

M1552014700088

1. Assemble a manifold gauge onto the high

pressure service valve.

2. Turn ON the engine and then turn ON the air

conditioner switch.

Items

State

Insufficient

Many bubbles are seen.
If refrigerant is extremely
low, it appears white.

Sufficient or excess
refrigerant

No bubbles are seen.

AC005963

Bubbles

Insufficient
refrigerant

Sufficient or excess
refrigerant

AC

AC005671

Magnetic cluch
connector

AC

ON-VEHICLE SERVICE

HEATER, AIR CONDITIONER AND VENTILATION

55A-52

3. Check to see that the voltage between the A/C

pressure sensor terminal No.2 and body earth
reflects the specifications of the Figure.
NOTE: The allowance shall be defined as

±

five

percents.

CHARGING

M1552001200340

1. With the handles turned back all the way (valve

closed), install the adaptor valve to the
low-pressure side of the gauge manifold.

2. Connect the charging hose (blue) to the adaptor

valve.

3. Connect the quick joint (for low-pressure) to the

charging hose (blue).

CAUTION

•

Use tools that are suited to R134a.

•

To install the quick joint, press section when
connecting, run your hand along the hose
while pressing to ensure that there are no
bends in the hose.

4. Connect the quick joint (for low-pressure) to the

low- pressure service valve.
NOTE: The low-pressure service valve should be
connected to the flexible suction hose.

AC206295

1

2

3

A/C pressure sensor

AB

AC208297AB

Refrigerant pressure (MPa)

Output voltage

(V)

0

1

2

3

5

4

1

2

3

AC212526AB

A

Sleeve

Low-pressure
service valve

Quick
joint
(for low
pressure)

Switch

Vacuum
pump

Power supply
plug

Vacuum
pump
adaptor

R-12
connection
port

Charging hose
(blue)

Adapter
valve

Charging hose
(yellow)

Gauge manifold

Switch

R-134a
connection
port

Low-pressure
valve

High-pressure
valve

ON-VEHICLE SERVICE

HEATER, AIR CONDITIONER AND VENTILATION

55A-53

5. Close the high and low-pressure valves of the

gauge manifold.

CAUTION

Be sure to connect the power plug of the vacuum
pump to the vacuum pump adapter, and then
connect the power plug of the adapter to a 100-V
outlet.
6. Install the vacuum pump adaptor to the vacuum

pump.

7. Connect the charging hose (yellow) to the R-134a

connection port of the vacuum pump adaptor.

8. Tighten the adaptor valve handle (valve open).
9. Open the low-pressure valve of the gauge

manifold.

10.Turn the power switch of the vacuum pump to the

ON position.
NOTE: Even if the vacuum pump power switch is
turned ON, the vacuum pump will not operate
because of the power supply connection in step
(6).

CAUTION

Do not operate the compressor for evacuation.

11.Turn the vacuum pump adaptor switch to the

R134a side to start the vacuum pump.

12.Evacuate to a vacuum reading of 100 kPa or

higher (takes approx. 10 minutes).

CAUTION

Do not operate the compressor in the vacuum
condition; damage may occur.
13.Loosen the valve of the adapter valve fully (valve

closed), and turn off the vacuum pump adapter
switch. Then leave it for five minutes.

14.Check the system for proper sealing (negative

pressure should not decrease).

15.Connect the service can valve to the service can

with the handle loosened fully (valve closed).

16.Turn the handle of the adaptor valve back all the

way (valve closed), remove it from the gauge
manifold and install the service can.

17.Tighten the handle of the charging valve (valve

closed) to puncture the service can.

AC212535

Vacuum
pump

Low-pressure
service valve

AB

Vacuum pump
adaptor switch

AC212536

Valve open

Valve close

Charging valve

Service can

Adaptor valve

AB

ON-VEHICLE SERVICE

HEATER, AIR CONDITIONER AND VENTILATION

55A-54

CAUTION

If the service can is inverted, liquid refrigerant
may be drawn into the compressor damaging it
by liquid compression. Keep the service can
upright to ensure that refrigerant is charged in
gas state.

18.Turn the handle of the charging valve back (valve

open) and tighten the handle of the adaptor valve
(valve open) to charge the system with refrigerant.

19.If the refrigerant is not drawn in, turn the handle of

the adaptor valve back all the way (valve closed).

20.Check for gas leaks using a leak detector. If a gas

leak is detected, re-tighten the connections, and
then repeat the charging procedure from
evacuation in step (11).

CAUTION

The leak detector for R-134a should be used.
21.Start the engine.
22.Operate the A/C and set to the lowest

temperature (MAX. COOL).

23.Fix the engine speed at 1,500 r/min.

CAUTION

If the service can is inverted, liquid refrigerant
may be drawn into the compressor damaging it
by liquid compression. Keep the service can
upright to ensure that refrigerant is charged in
gas state.
24.Tighten the handle of the adaptor valve (valve

open) to charge the required volume of
refrigerant.

25.After charging with refrigerant, turn the handle of

the adaptor valve back all the way (valve closed).

26.Tighten the charging valve handle (valve closed).

Remove the quick joint (for low-pressure) from the
low-pressure service valve.

27.Remove the service can.

NOTE: If the service can is not emptied
completely, keep the handles of the charging
valve and adaptor valve closed for the next
charging.

CORRECTING LOW REFRIGERANT
LEVEL IN CASE THE SERVICE CAN IN
USED

M1552014600081

1. Install the charge valve with the handle turned all

the way back (valve open) to the service can.

2. Install the adaptor valve with the handle turned all

the way back (valve close) to the charging valve.

3. Connect the charging hose (blue) to the adaptor

valve.

4. Connect the charging hose (blue) to the quick

joint (for low-pressure).

5. Tighten the handle of the charge valve (valve

close), and pierce the service can.

6. Turn the handle of the adaptor valve to bleed the

air.

7. Install the quick joint (for low-pressure) to the

low-pressure service valve.

AC212537

Charging valve

Service can
(Refrigerant container)

Low-pressure
service valve

AB

AC300372 AB

Valve open

Valve close

Service can
(Refrigerant
container)

Charge valve

Adaptor valve

Charging hose (blue)

Quick joint (for low-pressure)

AC300373

Quick joint
(for low-pressure)

Low-pressure
service valve

AB