Mitsubishi Lancer Evolution 7. Manual — part 380
CHASSIS ELECTRICAL -
Ignition Switch and Immobilizer System
54A-9
Inspection procedure 2
The ignition keys cannot be registered using the MUT-II.
Probable cause
The ignition key has not been registered with the immobilizer-ECU. Or that there
is a problem with the immobilizer-ECU.
D
Malfunction of ignition key
D
Malfunction of harness or connector
D
Malfunction of immobilizer-ECU
Register the ignition key.
YES
NO
YES
Is a normal diagnosis code output?
NO
Can none of the ignition keys be registered?
Replace the ignition key that cannot be registered.
To Chart Classified by Diagnosis Codes (Refer to P.54A-6.)
OK
Immobilizer-ECU power supply and earth circuit system check
(Refer to Inspection Procedure 4.)
NG
Replace the immobilizer-ECU.
Check the trouble symptoms.
Inspection procedure 3
The engine does not start. (The engine cranks but does
not fire.)
Probable cause
If the fuel injection does not operate, the cause is probably a problem with the
immobilizer-ECU, or it could also be a problem with the MPI system. If an
attempt has been made to start the engine with a key that has not been
properly registered, the above symptom is a sign of normal operation.
D
Malfunction of MPI system.
D
Malfunction of immobilizer-ECU
NG
Battery check (Refer to P.54A-4)
YES
NO
Refer to GROUP 13A - Troubleshooting.
YES
NO
To Chart Classified by Diagnosis Codes (Refer to P.54A-6.)
Is a normal diagnosis code output from the immobilizer-ECU?
OK
Voltage check during cranking
OK: 8 V or higher
Is a normal diagnosis code output by the engine-ECU?
NG
OK
Immobilizer-ECU power supply and earth circuit system check
(Refer to Inspection Procedure 4.)
NG
Replace the immobilizer-ECU.
Check the trouble symptoms.
Check the trouble symptoms.
NG
To inspection procedures if the engine does not fire (Refer to
GROUP 13A - Troubleshooting.)
CHASSIS ELECTRICAL -
Ignition Switch and Immobilizer System
54A-10
Inspection procedure 4
Immobilizer-ECU power supply and earth circuit system check
NG
Check the harness between the engine control relay and the
immobilizer-ECU, and repair if necessary.
OK
Check the trouble symptoms.
(2) NG
Repair
Measure at immobilizer-ECU connector C-202-1.
D
Ignition switch: ON
D
Disconnect the connector and measure at the harness
side.
(1) Voltage between terminal (1) and body earth
OK: System voltage
(2) Voltage between terminal (4) and body earth
OK: Continuity
(1) NG
Check the following connectors:
<L.H. drive vehicles> C-202-1, C-202, C-129, D-108
<R.H. drive vehicles> C-202-1, C-202, C-130, D-108
NG
NG
OK
Check the trouble symptoms.
Repair
NG
Check the following connectors: C-202-1, C-202, C-08
Check the harness between the immobilizer-ECU and body
earth, and repair if necessary.
IMMOBILIZER-ECU CHECK
TERMINAL VOLTAGE CHECK TABLE
Terminal No.
Signal
Inspection conditions
Terminal voltage
1
Immobilizer-ECU power supply
Ignition switch: ON
System voltage
2
-
-
-
3
Engine-ECU
-
-
4
Immobilizer-ECU earth
At all times
0V
CHASSIS ELECTRICAL -
Ignition Switch and Immobilizer System
54A-11
IGNITION SWITCH
REMOVAL AND INSTALLATION
7
6
1
5
3
2
4
8
Removal steps
1. Lower column cover (Refer to GROUP
52A - Instrument Panel.)
2. Upper column cover (Refer to GROUP
52A - Instrument Panel.)
3. Steering Wheel (Refer to GROUP
37A.)
4. Clock spring column switch assembly
(Refer to GROUP 37A - Steering
Shaft.)
A
A"
5. Steering lock cylinder
6. Ignition switch
7. Key reminder switch
8. Immobilizer-ECU
REMOVAL SERVICE POINT
A
A" STEERING LOCK CYLINDER REMOVAL
1. Insert key into steering lock cylinder to turn ignition key
to “ACC” position.
2. Insert locking pin with small plus screwdriver, etc., and
remove steering lock cylinder.
Locking pin
CHASSIS ELECTRICAL -
Ignition Switch and Immobilizer System
54A-12
INSPECTION
IGNITION SWITCH CONTINUITY CHECK
With ignition switch installed on the vehicle, disconnect ignition
switch connector for inspection.
Ignition key
iti
Terminal No.
g
y
position
1
2
4
5
6
LOCK
ACC
ON
START
KEY REMINDER SWITCH CONTINUITY CHECK
With key reminder switch installed on the vehicle, disconnect
key reminder switch connector for inspection.
Ignition key status
Terminal No.
g
y
4
6
Remove
Insert
ENCRYPTED CODE REGISTRATION METHOD
AND RESETTING THE CODE TO THE FACTORY
SETTING
Register the encrypted code in the immobilizer-ECU and then
reset the code to the factory setting after parts have been
replaced.
Replacement part
Encrypted code
Ignition key
Necessary
Immobilizer-ECU
Necessary
Engine-ECU*
Necessary
NOTE
*: If the engine-ECU is replaced, the immobilizer-ECU should
be replaced. Each engine-ECU has an individual information
for immobilizer-ECU, and the individual information is
registered in the immobilizer-ECU.
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