1998 MITSUBISHI LANCER EVOLUTION IV ECU

CHASSIS ELECTRICAL – Ignition Switch and Immobilizer System54-21
ID CODE REGISTRATION METHOD
If using an ignition key that has just been newly purchased,
or if the immobilizer-ECU has been replaced, you will need
to register the ID codes for each ignition key being used
into the immobilizer-ECU. (A maximum of eight different ID
codes can be registered.)
Moreover, when the immobilizer-ECU has been replaced, you
will need to use the MUT-II to register the password that
the user specifies into the immobilizer-ECU. (Refer to the
MUT-II instruction manual for instructions on using the MUT-II.)
Caution
If registering of the ID codes is carried out all
previously-registered codes will be erased. Accordingly,
you should have ready all of the ignition keys that have
already been registered.
1. Connect the MUT-II to the diagnosis connector.
Caution
Turn the ignition switch off before connecting or
disconnecting the MUT-II.
2. Check that the diagnosis code No.54 is not displayed
for MPI system. If the code is displayed, carry out
troubleshooting before proceeding to the next step. (Refer
to GROUP 13A – Troubleshooting).
3. Use the ignition key that is to be registered to turn the
ignition switch to the ON position.
4. Use the MUT-II to register the ID code. If you are
registering two or more codes, use the next key to be
registered to turn the ignition switch to the ON position
without disconnecting the MUT-II.
5. Disconnect the MUT-II. This completes the registration
operation.
6. Check that the engine can be started by each one of
the ignition keys.
7. Check that the diagnosis code No.54 is not displayed
for MPI system. If the code is displayed, erase it. (Refer
to GROUP 13A – Troubleshooting).
MUT-II

CHASSIS ELECTRICAL – Combination Meters54-24
TROUBLESHOOTING
INSPECTION CHART FOR TROUBLE SYMPTOMS
Trouble symptomInspection
procedureReference
page
Speedometer does not work.154-24
Tachometer does not work.254-25
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
Inspection Procedure 1
Speedometer does not work.
Probable cause
Examine the diagnosis codes registered in the engine-ECU. If no wheel speed
sensor-relating diagnosis code has been output, the wheel speed sensors are in order.
Malfunction of vehicle speed sensor

Malfunction of speedometer

Malfunction of harness or connector

Malfunction of relevant ECU
Disconnect the combination meter con-
nectors B-08 or B-09 and measure at
the harness sides.
1. Continuity between the terminal
No.11 and earth
OK: Continuity
2. Voltage between terminal No.51 and
earth.
OK: 4.7 V or more
3. Voltage between the terminal No.22
and earth
OK: System voltage1. NG
OK
Replace the speedometer.YES
Vehicle speed sensor circuit system
inspection (Refer to Inspection
Procedure 3 on P.54-26.)
OK
Check the following connectors.
B-09, B-50NG
Repair
OK
Check trouble symptom.
Check the harness between the body
earth and combination meter, and repair
if necessary.NG
2. NGCheck the following connectors.
B-08, B-64, A-19NG
Repair
OK
Check trouble symptom.
Check the harness between the com-
bination meter and the vehicle speed
sensor, repair if necessary.NG
3. NGCheck the following connectors.
B-09, B-49, B-75, B-73NG
Repair
OK
Check trouble symptom.
Check the harness between the power
supply and combination meter, and
repair if necessary.NG
MUT-II Self-Diag code
Is the diagnosis code 24 relating to MPI
system output?

CHASSIS ELECTRICAL – Combination Meters54-25
Inspection Procedure 2
Tachometer does not work.
Probable cause
The ignition signal may not be input from the engine, or there may be a malfunction
in the power supply or earth circuit.
Malfunction of tachometer

Malfunction of harness or connector
Disconnect the combination meter con-
nector B-08 and measure at the harness
sides.
1. Measure the voltage between
terminal No.33 and earth.
OK: 5 V
2. Continuity between the terminal
No.34 and earth
OK: Continuity
3. Voltage between the terminal No.42
and earth
OK: System voltage1. NGCheck the following connectors.
B-08, A-36, B-61, B-64, A-41, A-109NG
Repair
OK
Check trouble symptom.NGCheck the harness between the engine-
ECU and combination meter, and repair
if necessary.
2. NGCheck the following connectors.
B-08, B-50, B-64, A-41NG
Repair
OK
Check trouble symptom.NGCheck the harness between the com-
bination meter and the body earth, and
repair if necessary. OK
Replace the tachometer.
3. NG
Check the following connectors.
B-08, B-75, B-76NG
Repair
OK
Check trouble symptom.NGCheck the harness between the power
supply and combination meter, and
repair if necessary.
YESRefer to Group 13 – Troubleshooting,
No. 44 Ignition coils and power
transistors.
OK
MUT-II Self-Diag code
Is the diagnosis code 44 relating to MPI
system output?

CHASSIS ELECTRICAL – Combination Meters54-26
Inspection Procedure 3
Vehicle speed sensor circuit system inspection
Signals from the vehicle speed sensor are utilized both in the speedometer and the engine-ECU.
Vehicle speed sensor inspection (Refer to P.54-27.)NG
Replace
OK
Disconnect the vehicle speed sensor connector A-19 and measure
at the harness side.
1. Voltage between the terminal No.1 and earth
OK: System voltage
2. Continuity between terminal No.2 and earth
OK: Continuity
3. Voltage between the terminal No.3 and earth
OK: 4.5 V or more1. NGCheck the following
connectors. A-19, B-64NG
Repair
OK
Check trouble symptom.
NG
Check the harness wire between the vehicle speed sensor and
multi-purpose fuse 4, and repair if necessary.3. NG
Check the following
connectors. A-19, B-64,
B-08NG
Repair
2. NGCheck the following
connector. A-19NG
RepairOK
Check trouble symptom.
NG
Check the harness between the vehicle speed sensor and combina-
tion meter, and repair if necessary.OK
Check trouble symptom.
NG
Check the harness wire between the vehicle speed sensor and
body earth, and repair if necessary.
NOTE
If the trouble symptom still persists even after the above procedures are performed, check the vehicle
speed senosor output signal side circuit (harness, speedometer and engine ECU) for short-circuit.

CHASSIS ELECTRICAL – Combination MetersCHASSIS ELECTRICAL – Combination Meters54-27
ON-VEHICLE SERVICE
SPEEDOMETER CHECK
1. Adjust the pressure of the tyres to the specified level.
2. Set the vehicle onto a speedometer tester and use wheel
chocks to hold the rear wheels.
3. Pull the parking brake lever firmly.
4. To prevent the front wheel from moving from side to side,
attach tension bars to the tie-down hook, and secure
both ends to anchor plates.
5. To prevent the vehicles from starting, attach a chain or
wire to the rear towing hook, and secure the other end
of the chain or wire firmly to an unmovable body.
6. Check if the speedometer indication range is within the
standard values and if the pointer fluctuation is within
the limits.
Caution
Do not operate the clutch suddenly. Do not
increase/decrease speed rapidly while testing.
Standard values:
Vehicle speed km/hSpeedometer indication
allowable errors km/h
4037 – 45
8075 – 88
120113 – 132
160150 – 176
Limit: Pointer fluctuation
(at vehicle speeds of higher than 35 km/h) ±3 km/h
TACHOMETER CHECK
1. Insert a paper clip in the engine speed detection connector
from the harness side, and attach the engine
speedometer.
2. Compare the readings of the engine speedometer and
the tachometer at every engine speed, and check if the
variations are within the standard values.
Standard values:
700 r/min : ±100 r/min
3,000
*1 r/min : ±150 r/min
3,000*2 r/min : +225 to –100 r/min
5,000*1 r/min : ±250 r/min
5,000*2 r/min : +325 to –125 r/min
6,000*1 r/min : ±300 r/min
7,000*2 r/min : +400 to –100 r/min
8,000*3 r/min : +400 to 0 r/min
NOTE
*1: Tachometer measurable up to 8,000 r/min
*2: Tachometer measurable up to 9,000 r/min and one measurable up to 10,000 r/min
*3: Tachometer measureble up to 10,000 r/min
Wheel chocks
Tension bar
Tie-down hook
Front
Anchor plate
Engine speed detection
connector

CHASSIS ELECTRICAL – Headlamp54-32
HEADLAMP
SERVICE SPECIFICATIONS
ItemsStandard valueLimit
Headlamp
aiming
High
beam
Vertical direction25’ (22 mm) below horizontal line–
aiming
[Parenthe-
sized are
allowable
beam
Horizontal
directionLeft head-
lampParallel to direction of vehicle travel–
allowable
beam axis
deviations 3
m ahead of
Right head-
lamp15’ (13 mm) leftward from vertical line (V)–
m ahead of
headlamp.]Low
beam
Vertical direction25’ (22 mm) below horizontal line–p]beam
Horizontal directionPosition where 15* rising section intersects
vertical line (V)–
Headlamp intensity cd (Center of high-beam high intensity
zone)–15,000 or
more per
light
Cautions in Handling Headlamp Assembly
Each headlamp assembly has a plastic outer lens on. Observe the do’s and don’ts below when
handling the headlamps.

Do not leave the headlamps lit for longer than 3 minutes with a protective cover on.

Do not mask the outer lens surface by taping or in any other way.

Do not scrub the outer lens surface with a pointed tool.

Use the designated wax remover for cleaning the outer lens surface. Rinse it thoroughly.

Use the designated genuine bulbs.
SPECIAL TOOLS
ToolNumberNameUse
MB991502MUT-II sub as-
semblyETACS-ECU input signal checking

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 – Headlamp54-35
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