1998 MITSUBISHI LANCER EVOLUTION IV ignition

CHASSIS ELECTRICAL – Ignition Switch and Immobilizer System54-18
Inspection Procedure 4
Malfunction of the immobilizer-ECU power supply and earth circuit
Measure at the immobilizer-ECU con-
nector B-100.

Disconnect the connector and
measure at the harness side.
(1) Voltage between 2 and body earth
(Ignition switch: ON)
OK: System voltage
(2) Voltage between 1 and body earth
OK: System voltage
(3) Continuity between 8 and body earth
OK: Continuity(1) NGCheck the following connectors:
B-76, B-74, B-100NG
Repair
OK
Check trouble symptoms.
NG
Check the fuse and the harness wire
between the ignition switch (IG) and
immobilizer-ECU.NG
OK
Check trouble symptoms.NGCheck the ignition switch.
(Refer to P.54-20.)
(2) NG
Check the following connectors:
B-65, B-100NG
Repair
OK
Check trouble symptoms.NGCheck the harness wire between the
immobilizer-ECU and the engine control
relay, and repair if necessary.
(3) NG
Check the following connectors.
B-50, B-100NG
Repair
OK
Check trouble symptoms.NGCheck the harness wire between the
immobilizer-ECU and body earth, and
repair if necessary. Repair
CHECK AT IMMOBILIZER-ECU
TERMINAL VOLTAGE CHECK CHART
Terminal No.SignalChecking requirementsTerminal voltage
1Immobilizer-ECU power supplyIgnition switch: ONSystem voltage
2Ignition switch-IGIgnition switch: OFF0V
Ignition switch: ONSystem voltage
8Immobilizer-ECU earthAlways0V

CHASSIS ELECTRICAL – Ignition Switch and Immobilizer System54-19
IGNITION SWITCH AND IMMOBILIZER SYSTEM
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.
REMOVAL AND INSTALLATION
4
58 6
109 7
2
13


3 4
Immobilizer-ECU removal steps
1. Hood lock release handle
2. Driver‘s side lower cover

Radio and tape player vehicles>

Heater control assembly vehicles>
3. Immobilizer-ECUIgnition switch and ignition key
ring antenna removal steps
1. Hood lock release handle
2. Driver‘s side lower cover
4. Steering wheel
5. Column cover, lower
6. Column cover, upper
7. Column switch
8. Ignition key ring antenna
A9. Steering lock cylinder
10. Ignition switch

CHASSIS ELECTRICAL – Ignition Switch and Immobilizer System54-20
REMOVAL SERVICE POINTS
ASTEERING LOCK CYLINDER REMOVAL
1. Insert the key in the steering lock cylinder and turn it
to the “ACC” position.
2. Using a cross-tip (+) screwdriver (small) or a similar tool,
push the lock pin of the steering lock cylinder inward
and then pull the steering lock cylinder toward you.
INSPECTION
IGNITION SWITCH CONTINUITY CHECK
1. Remove the column cover lower and upper.
2. Disconnect the wiring connector from the ignition switch.
3. Operate the switch, and check the continuity between
the terminals.
Ignition key Terminal No.Ignition key
position
12356
LOCK
ACC
ON
START
IGNITION KEY RING ANTENNA CONTINUITY CHECK
Use a circuit tester to check the continuity between the
terminals.
Cross-tip (+)
screwdriver

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 Meters54-25
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 Meters54-28
FUEL GAUGE SIMPLE CHECK
Remove the fuel gauge unit connector.
Use the special tool to connect a test
lamp (12 V – 3.4 W) to the harness
connector. (Refer to Fig.1)
When the ignition switch is turned to
ON, the test lamp illuminates.OKThe needle of the fuel gauge moves.OKReplace the fuel gauge unit.
NG
Replace the fuel gauge.NG
Repair the harness.
FUEL GAUGE UNIT CHECK
Remove the fuel gauge unit from the fuel tank.
FUEL GAUGE UNIT RESISTANCE
1. Check that resistance value between the fuel gauge unit
terminal and earth terminal is at standard value when
fuel gauge unit float is at point F and point E.
Standard value:
Float positionMainSub
Point F1.8 ±1.2 Ω1.2 ±0.8 Ω
Point E65.2 ±4 Ω44.8 ±8 Ω
2. Check that resistance value changes smoothly when float
moves slowly between point F and point E.
Test lamp
(12V–3.4W)
Earth
Fuel gaugeMB991219
Fig: 1EarthFuel gauge
Fuel gauge unit
Earth
Earth Fuel gauge unit
Main fuel gauge unitSub fuel gauge unit

CHASSIS ELECTRICAL – Combination Meters54-29
FUEL GAUGE UNIT FLOAT HEIGHT
Move float and measure the height at point F (A) and at
point E (B) with float arm touching stopper.
Standard value:
Float positionMainSub
Point F16.417.5
Point E122.6134.6
FUEL LEVEL SENSOR (THERMISTOR)
1. Connect a test lamp (12V – 3.4W) to the fuel gauge
unit connector terminal and apply the battery voltage.
2. Condition is good if lamp goes off when the thermistor
is immersed in water and goes on when it is taken out
of water.
ENGINE COOLANT TEMPERATURE GAUGE SIMPLE CHECK
Remove the engine coolant tempara-
ture gauge unit connector.
Connect a test lamp (12 V – 3.4 W)
between the harness side connector
and the earth.
When the ignition switch is turned to
ON, the test lamp illuminates.OKThe needle of the engine coolant tem-
perature gauge moves.NGReplace the engine coolant tempera-
ture gauge.
OK
Replace the engine coolant tempera-
ture gauge unit.
NG
Repair the harness.
Point F
Point E
A
B Stopper
Stopper
Test lamp
(12V – 3.4 W)
Earth
Thermistor
Thermistor
Lamp goes on
Lamp goes off

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