Mitsubishi 380. Manual — part 213

ON-VEHICLE SERVICE

HEATER, AIR CONDITIONING AND VENTILATION

55-148

POWER RELAY CHECK

M1552008800321

BLOWER RELAY CONTINUITY CHECK

Hissing or swishing
noise

Low refrigerant quantity

Refrigerant level

Check system for leaks
and charge to
specification

Rattling (Internal
compressor)

Lack of lubricating oil. In a
system with a gas leak
the oil has escaped with
the refrigerant

Rattling noise from
internal compressor

Repalce the compressor
and also fix the system
leak to prevent
reoccurrance

Wooing (Resonant
noise)

Drive accessory (P/S
pump, Alternator,etc)
resonating at specific
engine speed

The drive accessories for
vibration

Stop vibrations of the
assembly or modify
transmission route to the
vehicle body

Cooing (Discharge
pulsation noise)

Pressure fluctuation of
refrigerant discharged
from compressor, which
vibrates the high pressure
piping

Remove the piping
mounting clamps and
re-check. Hold the
condenser without
mountings by hand and
re-check

Put rubber bush between
pipe clamps and the
vehicle body. decrease
refrigerant to minimum
specified level.

NOISE DESCRIPTION

POSSIBLE CAUSE

CHECK

REPAIR

BATTERY
VOLTAGE

TESTER
CONNECTION

SPECIFIED
CONDITION

Not applied

4

− 5

Open circuit

• Connect

terminal 1 to the
positive battery
terminal

• Connect

terminal 3 to the
negative battery
terminal

4

− 5

Less than 2 ohms

25DB057A

4
5

1 2 3

5

1

4

3

BLOWER RELAY

ON-VEHICLE SERVICE

HEATER, AIR CONDITIONING AND VENTILATION

55-149

A/C COMPRESSOR CLUTCH RELAY CONTINUITY
CHECK

IDLE-UP OPERATION CHECK

M1552001600401

Before inspection and adjustment, set vehicle in the following

condition:

• Engine coolant temperature: 80 − 90 °C (176.0 − 194.0 °F)

• Lights, electric cooling fan and accessories: OFF

• Transmission: Neutral ("N" or "P" position)

• Steering wheel: Straightforward

1. Check whether or not the idle speed is the standard value.

Standard value: 680

± 50 r/min

2. Turn on the air conditioning switch and the blower speed

selection dial. Engine idling speed should be within the
standard value:

Standard value: 680

± 50 r/min

NOTE: The Electronic control unit determines whether the
A/C load is low or high according to the output signal from
the A/C-ECU.

NOTE: It is not necessary to make an adjustment, because
the idling speed is automatically controlled by the ENGINE
ECU.

BATTERY
VOLTAGE

TESTER
CONNECTION

SPECIFIED
CONDITION

Not applied

1

− 4

Open circuit

• Connect

terminal 2 to the
positive battery
terminal

• Connect

terminal 3 to the
negative battery
terminal

1

− 4

Less than 2 ohms

AC306655

2

1

3 4

1

2

4

3

AB

A/C COMPRESSOR CLUTCH RELAY

FRONT OF
VEHICLE

JUNCTION BLOCK

TRIANGLE MARK

HEATER CONTROL ASSEMBLY AND A/C SWITCH

HEATER, AIR CONDITIONING AND VENTILATION

55-150

HEATER CONTROL ASSEMBLY AND A/C SWITCH

REMOVAL AND INSTALLATION

M1552002400369

25DB137A

1

2

REMOVAL STEPS

1.

CENTER PANEL ASSEMBLY
(REFER TO GROUP 52A,
INSTRUMENT PANEL

P.52A-4

)

2.

HEATER CONTROL (A/C-ECU)

HEATER UNIT, HEATER CORE, BLOWER ASSEMBLY AND EVAPORATOR UNIT

HEATER, AIR CONDITIONING AND VENTILATION

55-151

HEATER UNIT, HEATER CORE, BLOWER ASSEMBLY AND

EVAPORATOR UNIT

REMOVAL AND INSTALLATION

M1552021400012

WARNING

•

Before removing the front seat assembly, refer to GROUP 52B, Service Precautions

P.52B-16

and Air Bag Module and Clock Spring

P.52B-237

.

Pre-removal and Post-installation Operation
• Refrigerant draining and Refilling (Refer to Charging and

Discharging

P.55-142

).

• Engine coolant Draining and Refilling (Refer to GROUP

00, Engine coolant

P.00-47

).

• Instrument Panel Removal and Installation (Refer to

GROUP 52A, Instrument Panel

P.52A-4

).

• Steering Column Shaft Assembly Removal and Installa-

tion (Refer to GROUP 37A, Steering Shaft

P.37-25

).

• Floor Console Removal and Installation (Refer to GROUP

52A, Floor Console

P.52A-10

).

• Front Seat Assembly Removal and Installation (Refer to

GROUP 52A, Front Seat

P.52A-21

).

²

Strut Tower Bar (Refer to GROUP 42, Removal And
Installation

P.42-12

.)

25DB058A

1

2

3

4

N

5

6

7

2, 3

A/C compressor oil:

ND Oil 8

-Pipe coupling

4

4.9 ± 0.9 N·m

43 ± 8 in-lb

22 ± 4 N·m

16 ± 3 ft-lb

22 ± 4 N·m

16 ± 3 ft-lb

12 ± 2 N·m

102 ± 22 in-lb

12 ± 2 N·m

102 ± 22 in-lb

REMOVAL STEPS

•

BATTERY

•

AIR CLEANER BODY (REFER TO
GROUP 15, AIR CLEANER

P.15-4

.)

1.

HEATER HOSE CONNECTION

<<A>>

2.

SUCTION PIPE CONNECTION

<<A>>

3.

LIQUID PIPE CONNECTION

4.

O-RING

•

REAR HEATER DUCT A AND B
(REFER TO

P.55-175

.)

5.

JUNCTION BLOCK

REMOVAL STEPS (Continued)