1999 MITSUBISHI LANCER EVOLUTION VI engine

– 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.

– Condenser and Condenser Fan HEATER AND MANUAL
AIR CONDITIONER55-29
REMOVAL SERVICE POINTS
AFAN MOTOR AND SHROUD ASSEMBLY
REMOVAL
Remove the clamp bolt of the power steering oil cooler pipe.
Remove the fan motor and shroud assembly while pulling
the power steering oil cooler pipe toward you.
BDISCHARGE HOSE / LIQUID PIPE A
DISCONNECTION
Plug the open end of the disconnected hose and the opening
in the cooling unit not to let foreign matter get into them.
Caution
Seal the hoses completely, otherwise the compressor
oil and receiver will absorb water vapour easily.
CCONDENSER REMOVAL
Move the radiator to the engine side and then lift up the
condenser to remove it.
INSPECTION
CONDENSER FAN MOTOR CHECK
Battery connection terminalCondenser fan operation
12
Rotate
Condenser

FULL-AUTOMATIC AIR CONDITIONER – Troubleshooting55-43
Inspection procedure 2
Air conditioner does not operate.
Probable cause
If the A/C does not operate when the A/C switch is on and the temperature
setting is at 17C, the cause is probably insufficient refrigerant, or a
malfunction of the blower or of the magnet clutch power supply.
Malfunction of blower

Insufficient refrigerant

Malfunction of magnetic clutch

Malfunction of air thermo sensor

Malfunction of A/C compressor relay

Malfunction of refrigerant temperature switch

Malfunction of dual pressure switch

Malfunction of water temperature switch

Malfunction of connector or harness

Malfunction of engine-ECU

Malfunction of A/C-ECU
Does the blower operate?NOInspection procedure 7 (Refer to P.55-45.)
YES
A/C system refrigerant pressure check (Refer to P.55-13.)NGRefill the specified amount of refrigerant. (Refer to P.55-6.)
OK
MUT-II Self-Diag code
Is any of the codes 11, 12, 21 and 22 output?YESINSPECTION CHART FOR DIAGNOSIS CODES (Refer to
P.55-34.)
NO

Magnetic clutch check (Refer to P.55-25.)

A/C compressor relay check (Refer to P.55-14.)

Refrigerant temperature switch check (Refer to P.55-25.)

Dual pressure switch check (Refer to P.55-13.)

Water temperature switch check (Refer to P.55-64.)
<2,000>NG
Replace
OK
Measure at the A/C compressor relay connector A-116X.

Disconnect the connector, and measure at the harness
side connector.
(1) Continuity between terminal (4) and body earth
OK:Continuity
(2) Voltage between terminal (5) and body earth
OK:System voltageOKInspection procedure 13 (Refer to P.55-50.)
(2) NG
Check the following connector:
A-116X
(1) NG
Check the following connectors:
A-116X, A-106NG
Repair
NG
Repair OK
Check the trouble symptom.
NG
Check the harness between the fusible link and the A/C compressor
relay, and repair if necessary.
OK
Check the trouble symptom.
NG
Check the harness between the magnetic clutch and the A/C
compressor relay, and repair if necessary.

FULL-AUTOMATIC AIR CONDITIONER – Troubleshooting55-51
NG
Repair OK
Check the trouble symptom.
NG
Repair
OK
Check the trouble symptom.
NG
Check the harness between the condenser fan motor relay (HI)
and the engine-ECU, and repair if necessary.
Measure at the radiator fan motor relay (HI) connector A-114X.

Disconnect the connector.
(1) Continuity between 4-B-59 and connector terminal (20)
OK:Continuity
(2) Voltage between terminal (2) and body earth (Ignition
switch: ON)
OK:System voltage
(3) Voltage between terminal (1) and body earth
OK:System voltage(1) NGCheck the following connectors:
A-114X, A-28, B-59
From the previous page
NG
Repair
OK
Check the trouble symptom.
NG
Check the harness between the condenser fan motor relay (HI)
and the ignition switch, and repair if necessary.
(2) NG
Check the following connector:
A-114X
NG
Repair
OK
Check the trouble symptom.
NG
Check the harness between the condenser fan motor relay (HI)
and the fusible link 2, and repair if necessary.
(3) NG
Check the following connector:
A-114X
OK
Measure at the condenser fan motor connector A-99.

Disconnect the connector, and measure at the harness
side connector.

Connect the terminal B-59 to the earth.

Voltage between terminal (1) and body earth (Ignition switch:
ON)
OK:System voltageNOCheck the following connector:
A-112X
NG
Check the harness between the condenser fan motor relay (HI)
and the condenser fan motor, and repair if necessary.
Inspection procedure 14
Rear defogger does not operate.
Probable cause
If the rear defogger does not operate when the rear defogger switch is turned
on (timer operates for 20 minutes), the cause is probably a malfunction of the
A/C-ECU power supply system (earth).
Malfunction of connector or harness

Malfunction of A/C-ECU
Can an operating sound be heard when the rear defogger switch
is operated?NOInspection procedure 15 (Refer to P.55-52.)
YES
Replace the A/C-ECU.

FULL-AUTOMATIC AIR CONDITIONER – Troubleshooting55-53
Inspection procedure 16
A/C compressor control circuit check
Measure at the A/C-ECU connector B-05.

Blower switch and A/C switch: ON

Setting temperature: 17C

Connect the connector.

Voltage between terminal (34) and body earth (Ignition
switch: ON)
OK:System voltageNGCheck the following connector:
B-05
NG
Repair OK
Check the trouble symptom.
NG
Replace the A/C-ECU.
OK
Measure at the A/C compressor relay connector A-116X.

Disconnect the connector, and measure at the harness
side connector.

Voltage between terminal (2) and body earth
OK:System voltageNGCheck the following connectors:
A-49, B-15, B-05
NG
Repair OK
Check the trouble symptom.
NG
Check the harness between the A/C-ECU and the A/C compressor
relay, and repair if necessary.
OK
Measure at the engine-ECU connector B-54 or B-59.

Disconnect the connector, and measure at the harness
side connector.

Voltage between terminal (21) or (22) and body earth
OK:System voltageNGCheck the following connectors:
A-28, A-116X
NG
Repair OK
Check the trouble symptom.
NG
Check the harness between the A/C compressor relay and the
engine-ECU, and repair if necessary.
OK
Replace the engine-ECU.

C-1
ELECTRICAL
WIRING
(R.H. DRIVE VEHICLES)
CONTENTS
GENERAL 3. . . . . . . . . . . . . . . . . . . . . . . . . .
WIRING HARNESS CONFIGURATION
DIAGRAMS 4. . . . . . . . . . . . . . . . . . . . . . . . .
ENGINE COMPARTMENT 4. . . . . . . . . . . . . . . .
DASH PANEL 8. . . . . . . . . . . . . . . . . . . . . . . . . . .
FLOOR AND ROOF 12. . . . . . . . . . . . . . . . . . .
LUGGAGE COMPARTMENT 14. . . . . . . . . . . .
SINGLE PART INSTALLATION
POSITION 16. . . . . . . . . . . . . . . . . . . . . . . . .
RELAY 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ECU 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SENSOR 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SOLENOID AND SOLENOID VALVE 19. . . .
INSPECTION CONNECTOR 20. . . . . . . . . . . .
FUSIBLE LINK AND FUSE 20. . . . . . . . . . . . .
EARTH CABLE 21. . . . . . . . . . . . . . . . . . . . . . . .
EARTH 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CIRCUIT DIAGRAM 23. . . . . . . . . . . . . . . .
CENTRALIZED JUNCTION 23. . . . . . . . . . . . .
POWER DISTRIBUTION SYSTEM 24. . . . . .
STARTING SYSTEM 29. . . . . . . . . . . . . . . . . . .
IGNITION SYSTEM 30. . . . . . . . . . . . . . . . . . . .
CHARGING SYSTEM 31. . . . . . . . . . . . . . . . . .
MPI SYSTEM 32. . . . . . . . . . . . . . . . . . . . . . . . . .
COOLING SYSTEM 38. . . . . . . . . . . . . . . . . . . .
HEADLAMP 40. . . . . . . . . . . . . . . . . . . . . . . . . . .
TAIL LAMP, POSITION LAMP, LICENCE
PLATE LAMP AND LIGHTING MONITOR
BUZZER 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ROOM LAMP AND LUGGAGE
COMPARTMENT LAMP 45. . . . . . . . . . . . . . . .
IGNITION KEY CYLINDER ILLUMINATION
LAMP 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TURN-SIGNAL LAMP AND
HAZARD WARNING LAMP 48. . . . . . . . . . . . .
CONTINUED ON NEXT PAGE

– Engine Compartment WIRING HARNESS
CONFIGURATION DIAGRAMS
Connector
symbol
–01
thru
–50
A
Earth cable
C-4
WIRING HARNESS CONFIGURATION DIAGRAMS
ENGINE COMPARTMENT
A-01 (2-B) Brake fluid level switch
A-03 (1-B) Noise condenser
A-04 (1) Alternator
A-05 (4-GR) Alternator
A-09 (1-B) Starter
A-10 (1) Starter
A-12 (2-B) Fuel pressure solenoid valve
A-16 (4-B) Throttle position sensor
A-18 (6-B) Idle speed control servo
A-19 (3-B) Vehicle speed sensorA-20 (4-B) Windshield wiper motor
A-21 (8-B) Hydraulic unit
A-22 (2-B) Hydraulic unit
A-23 (2-B) Waste gate solenoid valve
A-25 (7-B) Air flow sensor
A-26 (2-B) Front speed sensor (LH) ABS>
A-28 (10-B) Control harness and front harness
combination

– Engine Compartment WIRING HARNESS
CONFIGURATION DIAGRAMSC-5
A-29 (2-B) Front harness and battery harness
combination
A-33 (1) Horn (LH)
A-34 (1) Horn (LH)
A-35 (2-BR) Outside air temperature sensor with fully automatic air conditioner>
A-38 (2-B) Engine coolant temperature sensorA-39 (1-B) Engine coolant temperature gauge unit
A-45 (1) Horn (RH)
A-46 (1) Horn (RH)
A-49 (2-BR) Dual pressure switch
A-50 (2-B) Front speed sensor (RH) ABS>