Mitsubishi 380. Manual — part 211

SPECIAL TOOLS

HEATER, AIR CONDITIONING AND VENTILATION

55-140

A: MB991824
B: MB991827
C: MB991910
D: MB991911
E: MB991914
F: MB991825
G: MB991826

MUT-III Sub
Assembly

A: Vehicle

communicatio
n interface
(V.C.I.)

B: MUT-III USB

cable

C: MUT-III main

harness A
(Vehicles with
CAN
communicatio
n system)

D: MUT-III main

harness B
(Vehicles
without CAN
communicatio
n system)

E: MUT-III main

harness C (for
Daimler
Chrysler
models only)

F: MUT-III

measurement
adapter

G: MUT-III

Trigger
Harness

MB991824-KIT

NOTE: . G:
MB991826 MUT-III
Trigger Harness is not
necessary when
pushing V.C.I.
ENTER key.

Checking diagnostic trouble codes

CAUTION

For vehicles with CAN
communication, use MUT-III
main harness A to send
simulated vehicle speed. If you
connect MUT-III main harness B
instead, the CAN
communication does not
function correctly.

TOOL

TOOL NUMBER
AND NAME

SUPERSESSION

APPLICATION

MB991910

MB991826

MB991958

MB991911

MB991914

MB991824

MB991827

MB991825

DO NOT USE

A

B

C

D

E

F

G

DO NOT USE

ON-VEHICLE SERVICE

HEATER, AIR CONDITIONING AND VENTILATION

55-141

ON-VEHICLE SERVICE

REFRIGERANT LEVEL TEST

M1552008400408

Use the refrigerant recovery station to remove all of the refrig-
erant, and then calculate the amount of the refrigerant and
charge it.

A/C COMPRESSOR CLUTCH TEST

M1552019900032

1. Disconnect the air conditioning compressor clutch connector

to the air conditioning compressor clutch.

2. Connect positive battery voltage directly to the connector for

the air conditioning compressor clutch.

3. If the air conditioning compressor clutch is normal, there will

be a "click." If the pulley and armature do not make contact
("no click"), there is a malfunction.

SIMPLE INSPECTION OF THE A/C PRESSURE
SENSOR

M1552014700118

1. Assemble a gauge manifold on the high pressure service

valve.

2. Disconnect the A/C pressure sensor connector and connect

special tool test harness MB991658 as shown in the illustra-
tion.

3. Turn ON the engine and then turn ON the air conditioner

switch.

AC206292AB

A/C COMPRESSOR
CLUTCH
CONNECTOR

AC305034

A/C PRESSURE SENSOR

AD

AC307368

A/C
PRESSURE
SENSOR
SIDE

MB991658

AB

HARNESS SIDE

ON-VEHICLE SERVICE

HEATER, AIR CONDITIONING AND VENTILATION

55-142

4. At this time, check to see that the voltage of A/C pressure

sensor terminal No. 2 reflects the specifications of the fig-
ure.

NOTE: The allowance shall be defined as

±5%.

COMPRESSOR DRIVE BELT ADJUSTMENT

M1552001000357

Refer to GROUP 00, Maintenance Service

− Drive Belts

P.00-39

.

CHARGING

M1552001200403

Use the refrigerant recovery station to charge the refrigerant.

METHOD BY USING REFRIGERANT RECOVERY
AND RECYCLING UNIT

Using the refrigerant recovery and recycling unit, refill the
refrigerant.

NOTE: Refer to the Refrigerant Recovery and Recycling Unit’s
Instruction Manual for operation of the unit.

DISCHARGING SYSTEM

Use the refrigerant recovery unit to discharge refrigerant gas
from the system.

NOTE: Refer to the Refrigerant Recovery and Recycling Unit’s
Instruction Manual for operation of the unit.

REFILLING OF OIL IN THE A/C SYSTEM

Too little oil will provide inadequate compressor lubrication and
cause a compressor failure. Too much oil will increase dis-
charge air temperature.
When a compressor is installed at the factory, it contains 140
ml of refrigerant oil. While the A/C system is in operation, the oil
is carried through the entire system by the refrigerant. Some of
this oil will be trapped and retained in various parts of the sys-
tem.
When the following system components are changed, it is nec-
essary to add oil to the system to replace the oil being removed
with the component.

Compressor oil: ND Oil 8

Quantity:

Evaporator: 40 ml
Condenser: 40 ml

25DB161A

REFRIGERANT PRESSURE (kPa)

OUTPUT VOLTAGE

(V)

0

1

2

3

5
4

1

2

3

ON-VEHICLE SERVICE

HEATER, AIR CONDITIONING AND VENTILATION

55-143

PERFORMANCE TEST

M1552001400526

The vehicles to be tested should be parked out of direct sun-
light.
1. Close the high and low-pressure valve of the gauge

manifold.

2. Connect the charging hose (blue) to the low-pressure valve

and connect the charging hose (red) to the high-pressure
valve of the gauge manifold.

3. Install the quick joint (for low-pressure) to the charging hose

(blue), and connect the quick joint (for high-pressure) to the
charging hose (red).

CAUTION

• To connect the quick joint, press section A firmly

against the service valve until a click is heard.

• 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 and connect the quick joint (for
high-pressure) to the high-pressure service valve.

NOTE: The high-pressure service valve is on the A/C pipe
and the low-pressure service valve is on the suction hose.

5. Start the engine.

6. Set the A/C controls as follows:

• A/C switch: A/C − ON position

• Mode selection: FACE position

• Temperature control: MAXIMUM COOLING position

• Air selection: RECIRCULATION position

• Blower switch: Maximum air volume

7. Adjust engine speed to 1,500 r/min with A/C clutch engaged.

8. Engine should be warmed up with doors and windows

closed.

9. Insert a thermometer in the center air outlet and operate the

engine for 20 minutes.

NOTE: If the A/C clutch cycles, take the reading before the
clutch disengages.

10.Note the discharge air temperature.

PERFORMANCE TEMPERATURE CHART

AC001388

LOW-PRESSURE
VALVE

HIGH-PRESSURE
VALVE

GAUGE MANIFOLD

CHARGING
HOSE (RED)

A

SLEEVE

CHARGING
HOSE (BLUE)

ADAPTOR
VALVE
(FOR
LOW-PRES-
SURE)

ADAPTOR
VALVE
(FOR HIGH-
PRESSURE)

LOW-
PRESSURE
SERVICE
VALVE

HIGH-
PRESSURE
SERVICE
VALVE

AB

25DB056A

THERMOMETER

GARAGE AMBIENT AIR TEMPERATURE

°C

(

°F)

20 (68)

25 (77)

30 (86)

35 (95)

Discharge air temperature

°C (°F)

1 (34)

− 6 (43)

Compressor high pressure kPa (psi)

1275 (185)

− 1863 (270)

Compressor low pressure kPa (psi)

49 (7.1)

− 294 (42.7)