1999 MITSUBISHI LANCER EVOLUTION VI service

HEATER AND MANUAL AIR CONDITIONER – On-vehicle Service55-13
DUAL PRESSURE SWITCH SIMPLE CHECK
Measure the high-pressure side pressure. If there is a
continuity between the dual pressure switch terminals with
the dual pressure switch in ON condition as shown in the
graph at left, the switch is in good condition. If not, it is faulty.
Replace the switch.
POWER RELAY CHECK
BLOWER RELAY
Battery voltageTerminal No.
1325
Power is not supplied
Power is supplied
Dual pressure switch
ON
Pressure
196 ± 20 221 2,354 ± 196 2,942 ± 196
OFF
kPa
Blower relay

HEATER AND MANUAL AIR CONDITIONER – On-vehicle Service55-14
A/C COMPRESSOR RELAY, CONDENSER FAN RELAY
Battery voltageTerminal No.
1345
Power is not supplied
Power is supplied
IDLE-UP OPERATION CHECK
1. Before inspection and adjustment, set vehicle in the
pre-inspection condition:
2. Check whether or not the idle speed is the standard value.
Standard value: 700 ± 50 r/min
NOTE
There is no necessity to make an adjustment, because
the idle speed is automatically adjusted by the ISC system.
If, however, there occurs a deviation from the standard
value for some reason, check the fuel control system.
3. When the A/C is running after turning the A/C switch
to ON, check to be sure that the idle speed is at the
standard value.
Standard value: 850 ± 50 r/min
Fan control relay
Compressor
relay
Radiator
fan relay
Condenser
fan relay

– Heater Control Assembly and A/C Switch HEATER AND MANUAL
AIR CONDITIONER55-15
HEATER CONTROL ASSEMBLY AND A/C SWITCH
REMOVAL AND INSTALLATION
Pre-removal and Post-installation Operation

Instrument Lower Panel and Heater Control Panel
Removal and Installation

Floor Console Assembly Removal and Installation

Foot Duct Removal and Installation
(Refer to P.55-31.)
3 4
1
2 5
Removal steps
AA1. Heater control assembly
2. Rear window defogger switch
3. A/C switch
4. Knob
5. Blower switch
REMOVAL SERVICE POINT
AHEATER CONTROL ASSEMBLY REMOVAL
1. Remove the heater control assembly mounting screws.
2. Bend the clamp and the bosses (2 each side), which
are inserted into the centre reinforcement.
3. Remove the heater control assembly.
Clamp
Boss
Boss

– Heater Control Assembly and A/C Switch HEATER AND MANUAL
AIR CONDITIONER55-16
INSTALLATION SERVICE POINT
AHEATER CONTROL ASSEMBLY INSTALLATION
1. Cut off the bosses and clamp shown before installing
a new heater control assembly.
2. Install the heater control assembly mounting screws.
3. Follow the steps below to install the air outlet changeover
damper lever cable.
(1) Set the air outlet changeover link of the heater unit
to the DEF position.
(2) Set the air outlet changeover control knob on the
heater control assembly to the DEF position.
(3) After inserting the inner cable into the link, pull the
outer cable to the heater control assembly side and
then fasten the outer cable to the clip of the heater
unit.
(4) After installation, operate the heater control knob to
check if the mode changeover can be accomplished
smoothly.
4. Follow the steps below to install the air mix damper lever
cable.
(1) Set the air mix damper link on the heater unit to
the MAX HOT position.
(2) Set the air mix damper knob of the heater control
assembly to the MAX HOT position.
(3) After inserting the inner cable into the link, pull the
outer cable to the heater control assembly side and
then fasten the outer cable to the clip of the heater
unit.
(4) After installation, operate the heater control knob to
check if the air mix damper can be actuated smoothly.
Clamp
Boss
Boss
DEF
position
MAX HOT position

– Heater Unit, Cooling and Blower Unit HEATER AND MANUAL
AIR CONDITIONER55-19
HEATER UNIT, COOLING AND BLOWER UNIT

REMOVAL AND INSTALLATION
Pre-removal and Post-installation Operation

Engine Coolant Draining and Refilling

Discharging and Charging of Refrigerant
(Refer to P.55-6.)

Air Cleaner Cover and Hose Removal and
Installation

Floor Console and Instrument Panel Removal and
Installation

Rear Seat Heater Duct Removal and Installation
(Refer to P.55-31.)
1
34
5 6
2 7
8 9
10 1112
Piping connection
O-ring
A/C Compressor oil: SUN PAG 56
Removal steps
1. Center reinforcement RH
2. Heater control assembly
3. Center reinforcement LH
4. Center ventilation duct
5. Foot distribution duct
6. Drain hose
A7. Connection between cooling unit
and refrigerant line8. Cooling and blower unit
9. Heater hose
10. Heater unit
11. Heater core support
12. Heater core
REMOVAL SERVICE POINT
AREMOVAL OF REFRIGERANT LINE FROM
COOLING UNIT
Plug the open end of the removed hose and the opening
in the cooling unit to prevent entry of dust and foreign
substances.
Caution
Compressor oil and the receiver are highly
moisture-absorptive.
Do not use plugs allowing ventilation.

– Blower Motor Assembly, Resistor and Evaporator HEATER AND MANUAL
AIR CONDITIONER55-20
BLOWER MOTOR ASSEMBLY, RESISTOR AND EVAPORATOR
REMOVAL AND INSTALLATION
4
6 2
1 5
3
7
Piping connection
O-ring
A/C Compressor oil: SUN PAG 56
Blower motor assembly removal
steps
1. Under cover

2. Blower motor assembly
Resistor removal steps
1. Under cover


Glove box, glove box frame
3. ResistorEvaporator removal steps


Discharging and Charging of
refrigerant (Refer to P.55-6.)

Glove box, glove box frame
4. Drain hose
A5. Connection between evaporator
and refrigerant line
B6. Case cover
B7. Evaporator
REMOVAL SERVICE POINT
AREMOVAL OF REFRIGERANT LINE FROM
EVAPORATOR
Plug the open end of the removed hose and the opening
in the evaporator to prevent entry of dust and foreign
substances.
Caution
Compressor oil and the receiver are highly
moisture-absorptive.
Do not use plugs allowing ventilation.

– Compressor and Tension Pulley HEATER AND MANUAL
AIR CONDITIONER55-24
REMOVAL SERVICE POINTS
ADRIVE BELT REMOVAL
1. Align the hole in the auto-tensioner bracket with that in
the arm and insert a screwdriver into the holes.
2. Remove the drive belt.
BSUCTION HOSE, DISCHARGE HOSE
DISCONNECTION
Plug the disconnected hose and the compressor nipple not
to let foreign matter get into them.
Caution
Seal the hoses completely, otherwise the compressor
oil and receiver will absorb water vapour easily.
CCOMPRESSOR REMOVAL
When doing this work, be careful not to spill the compressor
oil.
Auto-tensioner
Hole in
arm
Hole in
bracket
Screwdriver (+)

– Compressor and Tension Pulley HEATER AND MANUAL
AIR CONDITIONER55-25
INSTALLATION SERVICE POINT
ACOMPRESSOR INSTALLATION
If a new compressor is installed, first adjust the amount of
oil according to the procedures described below, and then
install the compressor.
1. Measure the amount (X m
) of oil within the removed
compressor.
2. Drain (from the new compressor) the amount of oil
calculated according to the following formula, and then
install the new compressor.
New compressor oil amount
120 to 140 m
– X m
= Y m

NOTE
(1)“120 to 140 ml” is the amount of oil filled in a new
compressor.
(2) Y m
indicates the amount of oil in the refrigerant
line, the condenser, the cooling unit etc.
INSPECTION
REFRIGERANT-TEMPERATURE SWITCH SIMPLE
CHECK
When the A/C is off, check that there is continuity between
the refrigerant-temperature switch terminals. If no, replace
the compressor assembly.
COMPRESSOR MAGNETIC CLUTCH OPERATION
INSPECTION
Connect the battery (+) terminal to the compressor side
terminal, and earth the battery (–) terminal to the body of
the compressor. The condition is normal if the sound of the
magnetic clutch (click) can be heard.AView A
Refrigerant temperature
switch terminal