1998 MITSUBISHI LANCER EVOLUTION IV Workshop Manual

CHASSIS ELECTRICAL – Ignition Switch and Immobilizer SystemCHASSIS ELECTRICAL – Ignition Switch and Immobilizer System54-17
Inspection Procedure 2
ID code cannot be registered using the MUT-II.
Probable cause
The cause is probably that there is no ID code registered in the immobilizer-ECU,
or there is a malfunction of the immobilizer-ECU.
Malfunction of the transponder

Malfunction of the ignition key ring antenna

Malfunction of harness or connector

Malfunction of the immobilizer-ECU
No ignition key can be registered.NOReplace the ignition key that cannot be
registered.Re-register the ID code.
(Refer to P.54-21.)
YES
Is a diagnosis code output?NOTo INSPECTION CHART FOR DIAG-
NOSIS CODE (Refer to P.54-13.)
YES
Check the immobilizer-ECU power
source and earth circuit. (Refer to
INSPECTION PROCEDURE 4.)OKCheck trouble symptoms.NGReplace the immobilizer-ECU.
Inspection Procedure 3
Engine does not start (cranking but no initial combustion).
Probable cause
If the fuel injectors are not operating, there might be a problem with the MPI system
in addition to a malfunction of the immobilizer system.
It is normal for this to occur if an attempt is made to start the engine using a key
that has not been properly registered.
Malfunction of the MPI system

Malfunction of the immobilizer-ECU
Is a diagnosis code output from the
immobilizer-ECU?NOTo INSPECTION CHART FOR DIAG-
NOSIS CODE (Refer to P.54-13.)
YES
Is a diagnosis code output from the
engine-ECU?NORefer to GROUP 13A – Troubleshoot-
ing.
YES
To inspection procedure for when there
is no initial combustion. (Refer to
GROUP 13A – Troubleshooting.)
OK
Check trouble symptoms.
NG
Check the immobilizer-ECU power sup-
ply and earth circuit (Refer to INSPEC-
TION PROCEDURE 4.)OKCheck trouble symptoms.NGReplace the immobilizer-ECU.

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 MetersCHASSIS ELECTRICAL – Combination Meters54-22
COMBINATION METERS
SERVICE SPECIFICATIONS
ItemsStandard valueLimit
SpeedometerAllowable indication range km/h
(Speedometer indication error to be
4037 – 45–
(Speedometer indication error to be
with –6% to +10%)8075 – 88–)
120113 – 132–
160150 – 176–
Pointer fluctuation km/h (at vehicle speeds of higher than 35
km/h)–±3
Tachometer indica-
tion error r/min
700All types of tachometer±100–
tion error r/min3,000Meters measurable up to 6,000 rpm and
meters measurable up to 8,000 rpm+ 150–
Meters measurable up to 9,000 rpm and
meters measurable up to 10,000 rpm+ 225
– 100–
4,750Meters measurable up to 6,000 rpm±160–
5,000Meters measurable up to 8,000 rpm±250–
Meters measurable up to 9,000 rpm and
meters measurable up to 10,000 rpm+ 325
– 125–
6,000Meters measurable up to 8,000 rpm±300–
7,000Meters measurable up to 9,000 rpm and
meters measurable up to 10,000 rpm+ 400
– 100–
8,000Meters measurable up to 10,000 rpm+ 400
– 0–
Fuel gauge unit
resistanceΩ
Main tankFloat point F1.8 ±1.2–
resistance ΩFloat point E65.2 ±4–
Sub tankFloat point F1.2 ±0.8–
Float point E44.8 ±3–
Fuel gauge unit
f
loat height mm
Main tankFloat point F16.4–
float height mmFloat point E122.6–
Sub tankFloat point F17.5–
Float point E134.6–
Engine coolant temperature gauge unit resistance (at 70 C) Ω104 ±13.5–
Fuel gauge resis-
tanceΩ
Power supply and earth192 ±19.2–
tance ΩPower supply and fuel gauge89 ±8.9–
Fuel gauge and earth103 ±10.3–
Engine coolant
temperature gauge
Power supply and earth187 ±18.7–
temperature gauge
resistance ΩPower supply and engine coolant temperature gauge90 ±4.5–
Engine coolant temperature gauge and earth247 ±24.7–

CHASSIS ELECTRICAL – Combination Meters54-23
SEALANT
ItemsSpecified sealantRemark
Engine coolant temperature gauge
unit threaded portion3M Adhesive nut locking No. 4171 or
equivalentDrying sealant
SPECIAL TOOLS
ToolNumberNameUse
A
B
C
D
MB991223
A: MB991219
B: MB991220
C: MB991221
D: MB991222Harness set
A: Test harness
B: LED harness
C: LED harness
adapter
D: ProbeFuel gauge simple check
A: Connector pin contact pressure check
B, C: Power circuit check
D: Commercial tester connection

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?