2005 MITSUBISHI LANCER Group 80

TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION55-66
STEP 11. Check the wiring harness between
C-123 engine-ECU connector terminal No.8 and
B-17X A/C compressor relay connector terminal
No.3.
•Check the A/C compressor relay earth line for
open circuit.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction P.00-5).
NO : Repair the wiring harness.
STEP 12. Check the wiring harness between
C-122 engine A/T-ECU connector terminal No.20
and B-17X A/C compressor relay connector
terminal No.3.
•Check the A/C compressor relay earth line for
open or short circuit.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction P.00-5).
NO : Repair the wiring harness.
AC304988AB
Connector: B-17X
Front of
vehicle
1
3 2
4
Relay box side
AC303804
Connector: C-123

AH
Harness side
C-123 (Y)
AC303816
Connector: C-123
AM

Harness side
C-123 (Y)
AC304988AB
Connector: B-17X
Front of
vehicle
1
3 2
4
Relay box side
AC303804
Connector: C-122

AG
Harness side
C-122 (GR)
AC303816
Connector: C-122
AL

Harness side
C-122 (GR)

ON-VEHICLE SERVICE
HEATER, AIR CONDITIONER AND VENTILATION55-69
ON-VEHICLE SERVICE
SIGHT GLASS REFRIGERANT LEVEL
TEST
M1552008400378
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: Use the refrigerant recovery station to
charge the specified refrigerant because you can
not calculate the amount of the refrigerant
properly with the sight glass.
MAGNETIC CLUTCH TESTM1552008500405
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
M1552001000335
<1300, 1600>
Refer to GROUP 11A, On-vehicle Service − Drive
Belt Tension Check P.11A-7.
<2000>
Refer to GROUP 11C, On-vehicle Service − Drive
Belt Tension Check P.11C-7.
DUAL PRESSURE SWITCH CHECKM1552010400320
1. Remove the dual pressure switch connector and
connect the high/low pressure side terminals
located on the harness side as shown in the
illustration..
2. Install a gauge manifold to the high-pressure side
service valve of the refrigerant line. (Refer to
P.55-98, P.55-99.)
3. When the high/low pressure sides of the dual
pressure switch are at operation pressure (ON)
the resistance should less than two ohms
between the terminals. If open circuit, replace the
switch. Items State
Insufficient Many bubbles are seen.
If refrigerant is extremely
low, it appears white.
Sufficient or excess
refrigerantNo bubbles are seen.
AC005963
Bubbles Insufficient
refrigerantSufficient or excess
refrigerant
AC
AC005671
Magnetic clutch connector
AC
AC001368AD High/Low
Pressure Side
Low-pressure side
High-pressure side
ON
OFFON
OFF
2650 ± 200 2060 ± 200230 ± 20 210 ± 25
(kPa)

ON-VEHICLE SERVICE
HEATER, AIR CONDITIONER AND VENTILATION55-76
FAN CONTROL RELAY CONTINUITY
CHECK
IDLE-UP OPERATION CHECK
M1552001600371
1. Before inspection and adjustment, set vehicle in
the following condition:
•Engine coolant temperature: 80 − 90 °C•Lamps, electric cooling fan and accessories: Set
to OFF
•Transmission: Neutral ("N" or "P" for vehicles with
A/T)
•Steering wheel: Straightforward
2. Check whether or not the idle speed is the
standard value. <1300, 1600> Refer to GROUP
13A, On-vehicle Service − Basic Idle Speed
Adjustment P.13A-387.
<2000> Refer to GROUP 13B, On-vehicle Service
− Basic Idle Speed Adjustment P.13B-324.
Standard value: 750 ± 50 r/min
3. When the A/C is running after turning the A/C
switch to ON, and the blower switch to the 3(MH)
or 4(HI) position, check to be sure that the idle
speed is at the standard value.
Standard value: 850 ± 50 r/min
NOTE: It is not necessary to make an adjustment,
because the idling speed is automatically
adjusted by the ISC system. If, however, a
deviation from the standard value occurs for some
reason, check the ISC system.
CLEAN AIR FILTER REPLACEMENT
PROCEDURE
M1552020100030
1. Remove the glove box (Refer to GROUP 52A,
Instrument Panel P.52A-2).
2. Remove the two screws as shown, and replace
the clean air filter.
3. Install the glove box. Battery voltage Tester
connectionSpecified
condition
Not applied 2 − 4 Open circuit
•Connect
terminal 1 to
the positive
battery
terminal
•Connect
terminal 3 to
the negative
battery
terminal2 − 4 Less than 2
ohms
AC305307
Fan control relay
13
4 2
3 4
1 2
AC
AC305114AB
Air filter
Instrument panel

HEATER UNIT, HEATER CORE, BLOWER ASSEMBLY AND EVAPORATOR UNIT
HEATER, AIR CONDITIONER AND VENTILATION55-81
HEATER UNIT, HEATER CORE, BLOWER ASSEMBLY
AND EVAPORATOR UNIT
REMOVAL AND INSTALLATION
M1552011600457
Pre-removal and Post-installation Operation
•Refrigerant draining and Refilling (Refer to Charging
P.55-70 and Discharging P.55-72).
•Engine coolant Draining and Refilling (Refer to GROUP
14, On vehicles service P.14-22).
•Instrument Panel Removal and Installation (Refer to
GROUP 52A, Instrument Panel P.52A-2).
•Air cleaner cover and air flow sensor assembly Removal
and Installation (Refer to GROUP 15, Air cleaner P.15-3).
•Rear console assembly Removal and Installation (Refer
to GROUP 52A, Rear console assembly P.52A-8).
•Front floor console assembly Removal and Installation
(Refer to GROUP 52A, Front floor console assembly
P.52A-6).
•Front seat assembly Removal and Installation (Refer to
GROUP 52A, Front seat assembly P.52A-24).
AC304861
1
2
3
4 5
6
7
8
N
9
AB
12 ± 2 N·m
6, 7O ring -Pipe coupling
A/C compressor oil:
SUN PAG 56
44 ± 10 N·m
44 ± 10 N·m
Removal steps
1. Front deck crossmember
2. Centre duct
3. Intake duct
•Foot duct (RH), Rear heater duct A
(RH) upper side (Refer to
P.55-101.)4. Blower assembly
5. Heater hose connection
<>6. Flexible suction hose connection
<>7. Liquid pipe B connection
8. O ring
9. Heater unitRemoval steps (Continued)

BLOWERMOTOR, RESISTOR AND OUTSIDE/ INSIDE AIR SELECTION DAMPER CONTROL MOTOR
HEATER, AIR CONDITIONER AND VENTILATION55-85
BLOWERMOTOR, RESISTOR AND OUTSIDE/
INSIDE AIR SELECTION DAMPER CONTROL MOTOR
REMOVAL AND INSTALLATION
M1551002800320
AC304885AB
2
31
Blower motor removal step
•Front passenger's side under cover
<>1. Blower motor
Resistor removal step
•Glove box (Refer to GROUP 52A,
Instrument Panel P.52A-2).
•Engine-ECU or
Engine-A/T-ECU (Refer to
GROUP 13A, Engine-ECU and
Engine-A/T-ECU P.13A-401).
2. ResistorOutside/inside air selection
damper control motor removal
step
•Glove box (Refer to GROUP 52A,
Instrument Panel P.52A-2).
•Engine-ECU or
Engine-A/T-ECU (Refer to
GROUP 13A, Engine-ECU and
Engine-A/T-ECU P.13A-401).
3. Outside/inside air selection damper
control motor

EVAPORATOR ASSEMBLY
HEATER, AIR CONDITIONER AND VENTILATION55-88
EVAPORATOR ASSEMBLY
REMOVAL AND INSTALLATION M1552003600355
REMOVAL SERVICE POINT
<> FLEXIBLE SUCTION HOSE AND
LIQUID PIPE B DISCONNECTION
CAUTION
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.
Pre-removal and Post-installation Operation
•Refrigerant draining and Refilling (Refer to Charging
P.55-70 and Discharging P.55-72).
•Air cleaner assembly <1300,1600> or Air cleaner and air
cleaner air flow sensor assembly <2000> Removal and
Installation (Refer to GROUP 15, Air cleaner P.15-3).
Y2346AU
1, 2, 4, 7
A/C compressor oil:
SUN PAG 56O ring
-Pipe coupling
2
101
3 4
7
6
5 98
8
12 ± 2 N·m
Removal steps
<>1. Flexible suction hose connection
<>2. Liquid pipe B connection
3. Expansion valve
4. Joint
•Glove box (Refer to GROUP 52A,
Instrument Panel P.52A-2).
•Engine-ECU or
Engine-A/T-ECU (Refer to
GROUP 13A, Engine-ECU and
Engine-A/T-ECU P.13A-401).
5. Joint duct
•Foot duct (LH), Rear heater duct
(LH), Rear heater duct (LH) (Refer
to P.55-101).
6. Evaporator cover
7. Evaporator
8. O ring 9. Air thermo sensor clip
10. Air thermo sensorRemoval steps (Continued)

EVAPORATOR ASSEMBLY
HEATER, AIR CONDITIONER AND VENTILATION55-89
REMOVAL AND INSTALLATION M1552003600366
Pre-removal and Post-installation Operation
•Refrigerant draining and Refilling (Refer to Charging
P.55-70 and Discharging P.55-72).
•Air cleaner assembly <1300,1600> or Air cleaner and air
cleaner air flow sensor assembly <2000> Removal and
Installation (Refer to GROUP 15, Air cleaner P.15-3).
AC304886AB
12 ± 2 N·m
7
7
2
1
9
8
6
5
4 3 1, 2, 6
A/C compressor oil:
SUN PAG 56O ring
-Pipe coupling
Removal steps
<>1. Flexible suction hose connection
<>2. Liquid pipe B connection
3. Expansion valve
•Glove box (Refer to GROUP 52A,
Instrument Panel P.52A-2).
•Engine-ECU or
Engine-A/T-ECU (Refer to
GROUP 13A, Engine-ECU and
Engine-A/T-ECU P.13A-401).
4. Joint duct•Foot duct (LH), Rear heater duct
(LH) (Refer to P.55-101).
5. Evaporator cover
<>6. Evaporator
7. O ring
8. Air thermo sensor clip
9. Air thermo sensorRemoval steps (Continued)