ECU MITSUBISHI LANCER EVOLUTION VI 1999 Workshop Manual

CHASSIS ELECTRICAL – Front Fog Lamp54-40
Standard values:
Vertical direction2° (349 mm) below horizontal line
(H)
Horizontal direction3° (524 mm) leftward from
vertical line (V)
Caution:
(1) Perform aiming adjustments, one light at a time,
with the other headlamp disconnected so as not
to be lit unless circumstances compel otherwise.
When reconnecting the headlamps, be careful not
to upset their aim. Do not leave the headlamps
on for any longer than 3 minutes if their outer
lenses are covered with a surface covering
impervious to light.
(2) Do not mask the outer lenses by taping or in any
other way.
(3) Aiming adjustment must be completed with the
aiming adjustment screws turned in the tightening
direction.
FOG LAMP BULB REPLACEMENT
1. Remove the fog lamp.
2. Remove the cover.
3. Unhook the spring which secures the bulb and then
replace the bulb.
Caution
(1) Do not touch the surface of the bulb with hands
or dirty gloves. If the surface does become dirty,
clean it with alcohol or thinner, and let it dry
thoroughly before installing.
(2) To prevent the clouding of lens and ingress of
water into the lamp unit, install the socket cover
correctly.
Lamp center
Vertical
direction
High
intensity
zone
center
(optical
axis)High intensity zone
Horizontal directionV
H
Cover

CHASSIS ELECTRICAL – Radio and Tape Player54-45
RADIO AND TAPE PLAYER
TROUBLESHOOTING
There is noise when the engine is running.
Kind of Noise (Parenthe-
sized is how noise
sounds.)SymptomCauseRemedy
AM, FM: Ignition noise
(Popping, snapping,
crackling, buzzing)
Popping sound becomes
faster with the increase
of engine speed.

The noise is lost with
ignition switch turned to
ACC.
Mainly due to the
spark plugs.

Due to noise circula-
tion from elsewhere

Noise from the engineCheck the noise capacitor
and earth cable and
replace if necessary. (See
Fig. 1 and Fig. 2.)
AM, FM: Defogger noise
(1) (Murmuring)Occurs when the defogger
switch is turned to ON and
OFF.Noise produced by spark-
ing when the defogger
switch is turned to ON/
OFF enters the glass
antenna.Check the noise capacitor
and replace if necessary.
(See Fig. 1.)
AM, FM: Defogger noise
(2) (Snapping noise)Occurs when the defogger
switch is turned to ON.Noise produced by current
flowing in the defogger
enters the glass antenna.Check the choke coil and
replace if necessary.
(See Fig. 3.)
AM, FM: Defogger noise
(3) (Scratching, gaggling)Occurs when the defogger
switch is turned to ON with
print heater wire broken.Noise produced by spark-
ing where print heater is
broken enters the glass
antenna.Repair the print heater.
AM, FM: Wiper motor
noise (Humming, wheez-
ing)Sound becomes faster with
the increase of wiper speed
and is lost when the wiper is
stopped.Caused by sparking in
wiper motor brush.Replace the wiper motor.
FM: Mirror motor noise
(Humming, wheezing)Occurs when electric mirror
operates.Caused by sparking in
mirror motor brush.Replace the electric
motor.
Other electrical compo-
nents–Noise is emitted by some
electrical components in
long use.Repair or replace electri-
cal components.
Static electricity (Crack-
ling, crinkling)
Noise is stopped when
the vehicle comes to a
complete stop.

Noise becomes louder
when the clutch is
released.Occurs when parts or
wiring move for some
reason and contact metal
parts of the body.Put parts or wiring into
position.
Various noises are produced
by body parts.Due to electrical detach-
ment of the hood, exhaust
pipe and muffler, suspen-
sion, etc. from the body.Tighten mounting bolts
securely. In many cases,
remedy of one part does
not eliminate the problem
due to incomplete earthing
elsewhere.
Caution
(1) Never let the noise filter contact a high tension cable. The noise filter could break down.
(2) Check that there is no external noise. This check is necessary to prevent misidentification of noise
sources.
(3) Noise prevention should be performed by eliminating noise sources in the descending order of loudness.

CHASSIS ELECTRICAL – Antenna54-49
REMOVAL SERVICE POINT
AANTENNA ASSEMBLY REMOVAL
To facilitate the installation work of the antenna assembly,
perform the following before removing the feeder cable:
1. Tie a cord to the end of the feeder cable.
2. Pull out the antenna assembly until the end of the drain
pipe can be seen.
3. Pass the cord through the hole in the end of the drain
pipe and wrap it with vinyl tape.
Caution
Wrap it securely so that the cord will not come off.
4. Pull out the antenna assembly little by little to remove
it.
REAR WINDOW ANTENNA AND GLASS DIVERSITY ANTENNA
REMOVAL AND INSTALLATION
12
Removal steps

Glove box

Front pillar trim (LH), center pillar trim
(LH), rear pillar trim (LH)
Assist grip
1. Radio and tape player
A2. Antenna assembly
Feeder cable
Cord
Cord
Tape
Hole

HEATER AND MANUAL AIR CONDITIONER – Troubleshooting55-4
TROUBLESHOOTING
TROUBLESHOOTING PROCEDURES
1. Check air ducts, control rods, etc. for improper connection.
2. Check that the electrical connectors of the relevant components are connected securely and the
fuse is not blown.
3. Perform the troubleshooting as follows; first understand the items to be inspected and the the procedures
comprehensively using Trouble Symptom/Failed Component Cross-Reference Table and then inspect
the appropriate items sequentially.
4. Be sure to perform each component check after disconnecting the relevant connector.
Trouble Symptom/Failed Component Cross-Reference Table
Items to be checked1.
When the igni-
tion switch is
“ON”, the A/C
does not oper-
ate.2.
When the A/C
is operating,
temperature
inside the pas-
senger
compartment
does not
decrease (cool
air is not
emitted).3.
Blower fan
motor does not
turn.4.
Blower fan
motor does not
stop turning.5.
When A/C is
operating,
radiator fan
and condenser
fan do not run.
Fuse111
Harness, connector2212
Amount of refrigerant31
A/C compressor relay4
A/C compressor magnet
clutch5
Dual pressure switch623
A/C switch7
Blower switch832
Blower relay4
Resistor53
Blower motor6
Air thermo-sensor93
Condenser fan relay44
Condenser fan motor55
Radiator fan relay (HI, LO)66
Radiator fan motor77
Refrigerant temperature
switch108
Auto compressor control
unit119
Engine-ECU12108

HEATER AND MANUAL AIR CONDITIONER – Troubleshooting55-5
No.Trouble symp-
tomProblem causeRemedyRefer-
ence
page
1When the igni-
tion switch is
“ON”, the A/C
does not oper
Refrigerant leak or overfilling of refriger-
antReplenish the refrigerant, repair the
leak or take out some of the
refrigerant55-6
does not oper-
ate.A/C compressor relay is defectiveReplace the A/C compressor relay55-14ate.
A/C compressor magnetic clutch is
defectiveReplace the A/C compressor magnet
clutch55-26
Dual pressure switch is defectiveReplace the dual pressure switch55-13
A/C switch is defectiveReplace the A/C switch55-17
Blower switch is defectiveReplace the blower switch55-17
Air thermo-sensor is defectiveReplace the air thermo-sensor55-22
Refrigerant temperature switch is defec-
tiveReplace the refrigerant temperature
switch55-25
Automatic compressor-ECU is defectiveReplace the automatic compressor-
ECU–
2When the A/C is
operating, tem-
perat re inside
Refrigerant leakReplenish the refrigerant and repair
the leak55-6
perature inside
the
passengerDual pressure switch is defectiveReplace the dual pressure switch55-13the passenger
compartment
doesn’tde-Air thermo-sensor is defectiveReplace the air thermo-sensor–doesnt de-
crease (cool air
is not emitted)
Condenser fan relay is defectiveReplace the condenser fan relay55-14
is not emitted).Condenser fan motor is defectiveReplace the condenser fan motor55-29
Radiator fan relay (HI, LO) is defectiveReplace the radiator fan relay (HI, LO)55-14
Radiator fan motor is defectiveReplace the radiator fan motor–
Refrigerant temperature switch is defec-
tiveReplace the refrigerant temperature
switch55-25
Automatic compressor-ECU is defectiveReplace the automatic compressor-
ECU–
3Blower fan mo-
tor doesn’t turn
Blower switch is defectiveReplace the blower switch55-17
tor doesn’t turn.Blower relay is defectiveReplace the blower relay55-13
Resistor is defectiveReplace the resistor55-21
Blower fan motor is defectiveReplace the blower fan motor55-21
4Blower fan mo-
tor doesn’t stop
t rning
Defective harness between the blower
fan motor and the blower switchRepair the harness–
turning.Blower switch is defectiveReplace the blower switch55-17
Resistor is defectiveReplace the resistor55-21
5When the A/C is
operating con
Condenser fan relay is defectiveReplace the condenser fan relay55-14
operating con-
denser fan orCondenser fan motor is defectiveReplace the condenser fan motor55-29denser an or
radiator fan
does not runRadiator fan relay (HI, LO) is defectiveReplace the radiator fan relay (HI, LO)55-14does not run.
Radiator fan motor is defectiveReplace the radiator fan motor–
Dual pressure switch is defectiveReplace the dual pressure switch55-13
Engine-ECU is defectiveReplace the engine-ECU–

HEATER AND MANUAL AIR CONDITIONER –
Troubleshooting /
On-vehicle Service55-6
INSPECTION AT THE AUTOMATIC COMPRESSOR-ECU TERMINAL
Terminal
No.Check itemChecking requirementsNormal condition
1Output from ECU to A/C compressor
relay
A/C compressor relay: OFFSystem voltage
relay
A/C compressor relay: ON0 V
2Input from A/C switch to ECUA/C switch: OFF0 V
A/C switch: ONSystem voltage
3EarthAlways0 V
ON-VEHICLE SERVICE
REFRIGERANT CHARGING
Caution
The refrigerant generates toxic gases when it is expored
to a heat source such as fire. Keep flames away from
the refrigerant. Perform refrigerant charging at a
well-ventilated place.
1. Recommended charging tools
The following commercially available tools are recommended
for discharging and charging refrigerant.

Gas charging set [No. EA95 (R134a)]

Gas charging set case [No. EA101CS-2]

Gauge manifold [No. EA101N-1]

Charging valve [No. EA108N]

Adapter valve [No. EA104AD-3]
NOTE
The adapter valve opens when the handle is turned
clockwise and closes when it is turned counter-clockwise.

Quick joint (for low pressure) [No. EA413L]

Quick joint (for high pressure) [No. EA413H]

Charging hose (red) [No. EA104N-1]

Charging hose (blue) [No. EA104N-2]

Charging hose (yellow) [No. EA104N-3]

Vacuum pump [No. EA112A]

Vacuum pump adaptor [No. EA112X]
Gauge manifold
Adapter valve
(for low pressure)
Charging hoseVacuum
pump adaptor
Quick joint
(for low pressure)Charging valve
Quick joint
(for high pressure)
Vacuum pump

FULL-AUTOMATIC AIR CONDITIONER – Troubleshooting55-34
TROUBLESHOOTING
STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING
Refer to GROUP 00 – How to Use Troubleshooting/Inspection Service Points.
DIAGNOSIS FUNCTION
DIAGNOSIS CODES CHECK
Connect the MUT-II or a voltmeter to the diagnosis connector (16-pin), then check diagnosis codes.
(Refer to GROUP 00 – How to Use Troubleshooting/Inspection Service Points.)
ERASING DIAGNOSIS CODES
Refer to GROUP 00 – How to Use Troubleshooting/Inspection Service Points.
INSPECTION CHART FOR DIAGNOSIS CODES
Code No.Diagnosis itemReference
page
11Inside air temperature sensor system (open circuit)55-34
12Inside air temperature sensor system (short circuit)55-34
13Outside air temperature sensor system (open circuit)55-35
14Outside air temperature sensor system (short circuit)55-35
15Heater water temperature sensor system (open circuit)55-36
16Heater water temperature sensor system (short circuit)55-36
21Air thermo sensor system (open circuit)55-37
22Air thermo sensor system (short circuit)55-37
31Potentiometer system of air mix damper assembly55-38
32Potentiometer system of air outlet changeover damper assembly55-39
41Drive system of air mix damper motor assembly55-40
42Drive system of air outlet changeover damper motor assembly55-40
INSPECTION PROCEDURES FOR DIAGNOSIS CODES
Code No.11 Inside air temperature sensor system (open
circuit)Probable cause
This diagnosis code is output if the power supply line or input line of the inside
air temperature sensor inside A/C-ECU is open-circuited and no signal is input
from the inside air temperature sensor to A/C-ECU.
Malfunction of the A/C-ECU
Replace the A/C-ECU.
Code No.12 Inside air temperature sensor system (short
circuit)Probable cause
This diagnosis code is output if the power supply line or input line of the inside
air temperature sensor inside A/C-ECU is short-circuited and inside air
temperature sensor power supply voltage signals are input to A/C-ECU.
Malfunction of the A/C-ECU
Replace the A/C-ECU.

FULL-AUTOMATIC AIR CONDITIONER – Troubleshooting55-35
Code No.13 Outside air temperature sensor system (open
circuit)Probable cause
This diagnosis code is output if the power supply line or input line of the outside
air temperature sensor is open-circuited and no signal is input from the outside
air temperature sensor to A/C-ECU.
Malfunction of the outside air temperature sensor

Malfunction of connector, harness

Malfunction of the A/C-ECU
Outside air temperature sensor check (Refer to P.55-62.)NG
Replace
OK
Measure at the outside air temperature sensor connector A-35.

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

Voltage between terminal (2) and body earth
OK:5 VNGCheck the following connectors:
B-15, B-16
NG
Repair OK
Check the trouble symptom.
NG
Check the harness between the outside air temperature sensor
and the A/C-ECU.
NG
Repair OK
Replace the A/C-ECU.
OK
Measure at the A/C-ECU connector B-04.

Connect the connector.

Voltage between terminal (7) and body earth
OK:2.3 – 2.9 VNGCheck the following connectors:
A-15, B-04
NG
Repair OK
Check the trouble symptom.
NG
Check the harness between the outside air temperature sensor
and the A/C-ECU, and repair if necessary.
OK
Check the following connector: B-04NG
Repair
OK
Check the trouble symptom.NGReplace the A/C-ECU.
Code No.14 Outside air temperature sensor system (short
circuit)Probable cause
This diagnosis code is output if the power supply line or input line of the outside
air temperature sensor is short-circuited and outside air temperature sensor power
supply voltage signals are input to A/C-ECU.
Malfunction of the outside air temperature sensor

Malfunction of connector, harness

Malfunction of the A/C-ECU
Outside air temperature sensor check (Refer to P.55-62.)NG
Replace
OK
Measure at the A/C-ECU connector B-04.

Connect the connector.

Voltage between terminal (7) and body earth
OK:2.3 – 2.9 VNGCheck the harness between the outside air temperature sensor
and the A/C-ECU, and repair if necessary.
OK
Replace the A/C-ECU.

FULL-AUTOMATIC AIR CONDITIONER – Troubleshooting55-36
Code No.15 Heater water temperature sensor system
(open circuit)Probable cause
This diagnosis code is output if the power supply line or input line of the heater
water temperature sensor is open-circuited and no heater water temperature sensor
signals are input to A/C-ECU.
Malfunction of the heater water temperature
sensor

Malfunction of connector, harness

Malfunction of the A/C-ECU
Heater water temperature sensor check (Refer to P.55-64.)NG
Replace
OK
Measure at the heater water temperature sensor connector B-02.

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

Voltage between terminal (1) and body earth
OK:5 VNGCheck the following connector:
B-04
NG
Repair OK
Check the trouble symptom.
NG
Check the harness between the heater water temperature sensor
and the A/C-ECU.
NG
Repair OK
Replace the A/C-ECU.
OK
Measure at the A/C-ECU connector B-04.

Connect the connector.

Voltage between terminal (4) and body earth
OK:2.3 – 2.9 VNGCheck the following connector:
B-02
NG
Repair OK
Check the trouble symptom.
NG
Check the harness between the heater water temperature sensor
and the A/C-ECU, and repair if necessary.
OK
Check the following connector: B-04NG
Repair
OK
Check the trouble symptom.NGReplace the A/C-ECU.
Code No.16 Heater water temperature sensor system
(short circuit)Probable cause
This diagnosis code is output if the power supply line or output line of the heater
water temperature sensor is short-circuited and heater water temperature sensor
power supply voltage signals are input to A/C-ECU.
Malfunction of the heater water temperature
sensor

Malfunction of connector, harness

Malfunction of the A/C-ECU
Heater water temperature sensor check (Refer to P.55-64.)NG
Replace
OK
Measure at the A/C-ECU connector B-04.

Connect the connector.

Voltage between terminal (4) and body earth
OK:2.3 – 2.9 VNGCheck the harness between the heater water temperature sensor
and the A/C-ECU, and repair if necessary.
OK
Replace the A/C-ECU.

FULL-AUTOMATIC AIR CONDITIONER – Troubleshooting55-37
Code No.21 Air thermo sensor system (open circuit)Probable cause
This diagnosis code is output if the power supply line or input line of the air thermo
sensor is open-circuited and no air thermo sensor signals are input to A/C-ECU.
Malfunction of the air thermo sensor

Malfunction of connector, harness

Malfunction of the A/C-ECU
Air thermo sensor check (Refer to P.55-22.)NG
Replace
OK
Measure at the air thermo sensor connector B-03.

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

Voltage between terminal (2) and body earth
OK:5 VNGCheck the following connector:
B-04
NG
Repair OK
Check the trouble symptom.
NG
Check the harness between the air thermo sensor and the
A/C-ECU.
NG
Repair OK
Replace the A/C-ECU.
OK
Measure at the A/C-ECU connector B-04.

Connect the connector.

Voltage between terminal (8) and body earth
OK:2.3 – 2.9 VNGCheck the following connector:
B-03
NG
Repair OK
Check the trouble symptom.
NG
Check the harness between the air thermo sensor and the
A/C-ECU, and repair if necessary.
OK
Check the following connector: B-04NG
Repair
OK
Check the trouble symptom.NGReplace the A/C-ECU.
Code No.22 Air thermo sensor system (short circuit)Probable cause
This diagnosis code is output if the power supply line or output line of the air thermo
sensor is short-circuited and air thermo sensor power supply voltage signals are
input to A/C-ECU.
Malfunction of the air thermo sensor

Malfunction of connector, harness

Malfunction of the A/C-ECU
Air thermo sensor check (Refer to P.55-22.)NG
Replace
OK
Measure at the A/C-ECU connector B-04.

Connect the connector.

Voltage between terminal (8) and body earth
OK:2.3 – 2.9 VNGCheck the harness between the air thermo sensor and the
A/C-ECU, and repair if necessary.
OK
Replace the A/C-ECU.