1998 MITSUBISHI LANCER EVOLUTION IV Workshop Manual

CHASSIS ELECTRICAL – Headlamp54-33
TROUBLESHOOTING
DIAGNOSIS FUNCTION
INPUT SIGNAL INSPECTION POINTS
Refer to Group 00 – How to Use Troubleshooting / Inspection Service Points.
The lighting monitor buzzer does not sound even when
the ignition key is removed with the tail lamps or
headlamps ON and the driver’s side door open. [However,
the key reminder warning buzzer sounds when inserting
the key into the ignition key cylinder.
Probable cause
The cause is probably a malfunction of the lighting switch input circuit system or
a malfunction of ETACS-ECU or buzzer ECU. When the key reminder warning buzzer
is sounding, the lighting monitor warning buzzer does not sound even if the tail lamps
or headlamps are lit.
Malfunction of harness or connector

Malfunction of ETACS-ECU

Malfunction of buzzer ECU

MUT-II Pulse check
OK:MUT-II buzzer sounds once
when the lighting switch is
turned from OFF to TAIL or
HEAD.NG
Check the following connectors.
B-79Repair
OK
Check trouble symptom.NGOK
Replace the ETACS-ECU.

NG
Check the harness in the junction block.NG
Replace the ETACS-ECU or the buzzer
ECU.OKRepair NG

CHASSIS ELECTRICAL – Headlamp54-34
ON-VEHICLE SERVICE
HEADLAMP AIMING
Bring the vehicle in the following conditions before aiming
the headlamp.

Check the tires for inflation pressure. Pump them up if
necessary to the labeled pressure level.

Set the vehicle unladen on a level floor.

Place one person (approximately 55 kg) on the driver’s
seat.
1. Position the tester so that its converging lens faces the
high-beam lamp ( marked) center to center at a distance
of 3 m from each other.
2. Aim the headlamps to appropriate standard values using
the aiming adjustment screw.
Face the face 3 m apart from each other
Lamp center
16M0001
Horizontal adjustment
Vertical
adjust-
ment

CHASSIS ELECTRICAL – Headlamp54-35
Standard values:
Vertical direction25’ (22 mm) below hori-
zontal line (H)
Horizontal
directionLeft headlampParallel to direction of
vehicle travel
Right head-
lamp15’ (13 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.
INTENSITY MEASUREMENT
1. Position the tester so that its light sensor faces each
headlamp center to center at the appropriate distance
shown.
2. Maintain an engine speed of 2,000 r/minto keep the battery
in the charged condition.
3. Check that the high-beam headlamp intensity at the center
of the high intensity zone satisfies the limit value.
Limit: 15,000 cd or more per headlamp
Caution
(1) Perform intensity measurement, one headlamp at
a time, with the low-beam lamp and the other
headlamp disconnected from the battery unless
circumstances compel otherwise. 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 lens surfaces by taping
or in any other way.
HEADLAMP BULB REPLACEMENT
1. Disconnect the connector.
2. Remove the socket cover.
3. Unhook the spring which secures the bulb, and then
remove the bulb.
Caution
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.

Lamp center
Vertical direction
Vertical direction High
intensity
zone
center
(optical
axis)
High
intensity
zone
center
(optical
axis)High intensity zone
High intensity zoneLamp center V
H
V
H
Screen type tester: 3 m Converging
lens type tester: 1 m
Spring

CHASSIS ELECTRICAL – HeadlampCHASSIS ELECTRICAL – Headlamp54-36
4. After the bulb is replaced, reinstall the socket cover with
the TOP mark facing upward.
NOTE
To prevent the clouding of lens and ingress of water into
the lamp unit, install the socket cover correctly.
POSITION LAMP BULB REPLACEMENT
Remove the position lamp by turning it together with the lamp
socket, then replace its bulb.
HEADLAMP AND FRONT TURN-SIGNAL LAMP
REMOVAL AND INSTALLATION
CAUTION: SRS
Before removal of air bag module and clock spring, refer to GROUP 52B – SRS Service Precautions and Air
Bag Module and Clock Spring.
5 Nm
2 3
4
5 Nm
1
1. Column switchRemoval steps
A2. Front turn-signal lamp
3. Radiator grille
A4. Headlamp
Position lamp connector

CHASSIS ELECTRICAL – Headlamp54-37
REMOVAL SERVICE POINT
AFRONT TURN-SIGNAL LAMP REMOVAL
1. Loosen the tapping screw connecting the headlamp to
the front turn-signal lamp. Put a screwdriver in the space
produced between the headlmap and the front turn-signal
lamp.
2. Prying the screwdriver in the direction shown, thrust the
front turn-signal lamp in the direction of the vehicle.
3. Unplug the connector and remove the front turn-signal
lamp.
INSTALLATION SERVICE POINT
AHEADLAMP INSTALLATION
Tighten attaching bolts and nuts in the order of A, B, C and
D.
INSPECTION
LIGHTING SWITCH, DIMMER/PASSING SWITCH
CONTINUITY CHECK
Switch positionTerminal No.
Connector AConnector B
56712346
LIGHTING
SWITCH
OFF
SWITCHTAIL
HEAD
DIMMER/
PASSING
LOWER
PASSING
SWITCHUPPERSWITCH
PASSING
Tapping screw
A
D B C
Connector A Connector B

CHASSIS ELECTRICAL – Headlamp54-38
HEADLAMP RELAY CONTINUITYCHECK
Battery voltageTerminal No.
1345
Not supplied
Supplied
Headlamp relay

CHASSIS ELECTRICAL – Front Fog Lamp54-39
FRONT FOG LAMP
SERVICE SPECIFICATIONS
ItemsStandard value
Headlamp aiming [Paren-
thesized are allowableVertical direction2° (349 mm) below horizontal line (H)
t
beam axis deviations 10 m
ahead of headlamp.]Horizontal direction3° (524 mm) leftward from vertical line (V)
ON-VEHICLE SERVICE
HEADLAMP AIMING
Bring the vehicle in the following conditions before aiming
the headlamp.

Check the tires for inflation pressure. Pump them up if
necessary to the labeled pressure level.

Set the vehicle unladen on a level floor.

Place one person (approximately 55 kg) on the driver’s
seat.

Maintain an engine speed of 2,000 r/min to keep the
battery in the charged condition.
1. Position the tester so that its converging lens faces the
fog lamp center to center at a distance of 10 m.
NOTE
Measure the center of the fog lamp as shown.
A: 572.5 mm (from the center of the vehicle body)
B: 360 mm
2. Remove the fog lamp bezel, and using the aiming
adjustment screw, aim the fog lamp to the standard value.
NOTE
The horizontal direction is non-adjustable. If the beam
axis deviation exceeds the standard value, check the
fog lamp to determine if it is installed out of position and
correct if necessary.
Face to face 10 m apart from
each other
AAB
Adjusting screw

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