2005 MITSUBISHI 380 Workshop Manual

ON-VEHICLE SERVICE
HEATER, AIR CONDITIONING AND VENTILATION55-148
POWER RELAY CHECKM1552008800321
BLOWER RELAY CONTINUITY CHECK
Hissing or swishing
noiseLow 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 refrigerantRattling noise from
internal compressorRepalce 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 speedThe drive accessories for
vibrationStop 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
pipingRemove the piping
mounting clamps and
re-check. Hold the
condenser without
mountings by hand and
re-checkPut rubber bush between
pipe clamps and the
vehicle body. decrease
refrigerant to minimum
specified level. NOISE DESCRIPTION POSSIBLE CAUSE CHECK REPAIR
BATTERY
VOLTAGETESTER
CONNECTIONSPECIFIED
CONDITION
Not applied 4
5 Open circuit
Connect
terminal 1 to the
positive battery
terminal
Connect
terminal 3 to the
negative battery
terminal4
5 Less than 2 ohms

ON-VEHICLE SERVICE
HEATER, AIR CONDITIONING AND VENTILATION55-149
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
V O LTA G ETESTER
CONNECTIONSPECIFIED
CONDITION
Not applied 1
4 Open circuit
Connect
terminal 2 to the
positive battery
terminal
Connect
terminal 3 to the
negative battery
terminal1
4 Less than 2 ohms

HEATER CONTROL ASSEMBLY AND A/C SWITCH
HEATER, AIR CONDITIONING AND VENTILATION55-150
HEATER CONTROL ASSEMBLY AND A/C SWITCH
REMOVAL AND INSTALLATIONM1552002400369
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 VENTILATION55-151
HEATER UNIT, HEATER CORE, BLOWER ASSEMBLY AND
EVAPORATOR UNIT
REMOVAL AND INSTALLATIONM1552021400012
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 ShaftP.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
InstallationP.42-12.)
REMOVAL STEPS
BATTERY
AIR CLEANER BODY (REFER TO
GROUP 15, AIR CLEANER
P.15-4.)
1. HEATER HOSE CONNECTION
<>2. SUCTION PIPE CONNECTION
<>3. LIQUID PIPE CONNECTION
4. O-RING
REAR HEATER DUCT A AND B
(REFER TO P.55-175.)
5. JUNCTION BLOCKREMOVAL STEPS (Continued)

HEATER UNIT, HEATER CORE, BLOWER ASSEMBLY AND EVAPORATOR UNIT
HEATER, AIR CONDITIONING AND VENTILATION55-152
REMOVAL SERVICE POINTS
.
<> SUCTION PIPE AND LIQUID PIPE DISCON-
NECTION
As the compressor oil and receiver are highly moisture
absorbent, use a non-porous material to plug the hose and
nipples.
To prevent the entry of dust or other foreign bodies, plug the
dismantled hose and the nipples of the expansion valves.
.
<> HEATER UNIT AND DECK
CROSSMEMBER ASSEMBLY REMOVAL
Disconnect the following connectors to gain access to the front
deck crossmember.
6. ETACS-ECU
<>7. HEATER UNIT AND DECK
CROSSMEMBER ASSEMBLY REMOVAL STEPS (Continued)
Connector
numberConnector name
C-113 AUDIO AMPLIFIER
C-114 AUDIO AMPLIFIER
C-25 FRONT WIRING HARNESS AND FLOOR
WIRING HARNESS COMBINATION
C-26 INSTRUMENT PANEL WIRING HARNESS
AND FRONT DOOR WIRING HARNESS (LH)
COMBINATION
C-27 INSTRUMENT PANEL WIRING HARNESS
AND ROOF WIRING HARNESS
COMBINATION
C-28 INSTRUMENT PANEL WIRING HARNESS
AND FLOOR WIRING HARNESS
COMBINATION
C-29 INSTRUMENT PANEL WIRING HARNESS
AND FRONT WIRING HARNESS
COMBINATION
C-30 STOPLIGHT SWITCH
C-07 CLUTCH PEDAL SWITCH