Mitsubishi Lancer Evolution IX. Manual — part 271

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-21

STEP 2. Check the immobilizer system diagnosis
code and MPI system diagnosis code.

Q: Which diagnosis code resets, the immobilizer

system diagnosis code or the MPI system
diagnosis code?
Immobilizer system diagnosis code is set :

Refer

to

P.54A-9

.

MPI system diagnosis code is set :

Refer to

GROUP 13A, Troubleshooting

P.13A-17

.

No diagnosis code is set :

Go to Step 3.

STEP 3. Check the starting system.

Q: Does the engine start?

YES :

Go to Step 4.

NO :

Refer to GROUP 13A, Troubleshooting

−

Symptom Chart

P.13A-233

. If the

malfunction is not resolved, replace the
immobilizer-ECU. Then register the
password (secret code) and encrypted
code. (Refer to

P.54A-22

). The engine

should start.

STEP 4. Retest the system

Q: Is the malfunction eliminated?

YES :

The procedure is complete. If no

malfunction are not found in all steps, an
intermittent malfunction is suspected (Refer
to GROUP 00, How to Use
Troubleshooting/Inspection Service
Points-How to Cope with Intermittent
Malfunction

P.00-5

).

NO :

Replace the immobilizer-ECU.

DATA LIST REFERENCE TABLE

M1543007300314

Item No.

Inspection item

Inspection
requirement

Normal condition

01

Key has been registered

−

Number of registered ignition keys

CHECK IMMOBILIZER-ECU

M1543007600564

TERMINAL VOLTAGE CHECK TABLE

AC304799

Terminal No.

Signal

Inspection condition

Terminal voltage

1

Immobilizer-ECU power supply

Ignition switch: "LOCK"
(OFF)

0V

Ignition switch: "ON"

System voltage

2

-

-

-

3

Engine-ECU

-

-

4

Immobilizer-ECU earth

Always

0V

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-22

ON-VEHICLE SERVICE

HOW TO REGISTER ENCRYPTED CODE

M1543008100528

CAUTION

Because registering the encrypted codes is done
after all previously-registered codes have been
erased, you should keep all of the ignition keys
that have already been registered accessible.
If the ignition key, immobilizer-ECU, engine-ECU is
replaced or an ignition key is added, encrypted
codes of all the ignition keys must be registered. (A
maximum of eight different ignition key can be regis-
tered). Moreover, when the immobilizer-ECU has
been replaced, you will need to use M.U.T.-II/III to
register the immobilizer-ECU and input the vehicle
secret code and to register the password (secret
code) that the owner specifies into the immobi-
lizer-ECU.
If an attempt is made to start the engine with an
unregistered ignition key, cranking occurs, but fuel
supply is cut off to disable the engine. In approxi-
mately.
NOTE: Engine-ECU has an encrypted code for
immobilizer-ECU, and the encrypted code is regis-
tered in the immobilizer-ECU and ignition key.

POINTS TO NOTE DURING OPERATION

If none of the functions can be used, check the diag-
nosis codes, and after carrying out any necessary
repairs, repeat the operation.
If an incorrect password is input ten times in a row,
the immobilizer-ECU judges that an unauthorized
operation is being attempted. Start-prevention mode
will be set, and engine operation will stop and all spe-
cial functions will be disabled. If the ignition switch is
turned to "ON" position, "Unauthorized operation,
start- prevention mode" will be cancelled.

KEY ID (ENCRYPTED CODE) REGISTRA-
TION <M.U.T.-II>

All ignition keys can be registered with M.U.T.-II.
Additional ignition keys can be registered with
M.U.T.-II.

Registration with the M.U.T.-II

CAUTION

To prevent damage to M.U.T.-II, always turn the
ignition switch to "LOCK" (OFF) position before
connecting or disconnecting M.U.T.-II.
NOTE:

.

•

Using the key ID register function will cause all
key IDs that have been previously registered in
the immobilizer-ECU to be erased. All keys need
to be registered. Those which have been regis-
tered before should be on hand before using this
function.

•

If registering more than one key, do not discon-
nect M.U.T.-II halfway through the registration
process.

•

After registering key IDs, check that the engine
can be started using all of the keys that have
been registered. If the engine will not start, refer
to Immobilizer System Diagnosis

P.54A-6

.

AC304777

Steering shaft

AB

MB991502

<Using the M.U.T.-II>

1. Connect M.U.T.-II to diagnosis connector (16-

pin).

2. Turn the ignition switch to "ON" position.

AC000522AD

3. At "System Select," press "YES"

AC000523AC

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-23

4. Select "Immobilizer," press "YES".

AC000530AC

5. Select "Special Func", press "YES".

If diagnosis code No.11 exists, "Can't execute" will
be displayed. Check for diagnosis code
No.11(Refer to

P.54A-9

).

AC000518AC

ACX01558

AG

6. Select "key ID register", press "YES".

ACX01626

AC

7. Input the password. Use the "UP" and "DOWN"

keys to change the current password digit to a
value between 0 and 9. Use the "LEFT" and
"RIGHT" keys to move to a different password
digit. Press the "YES" key to accept the password.
If an incorrect password is input five times in a
row, this screen is displayed and the
immobilizer-ECU switches to unauthorized
operation, start-prevention mode.
NOTE: Four separate digits must be input to
make up the password.

ACX01561

AD

8. Press the "YES" key to start key ID registration.

ACX01562

AC

9. This will be displayed when the key ID registration

is successful. If an error occurs during key ID
registration, the message "Can't execute" will be
displayed. If the key has already been registered,
"Key ID has been registered" will be displayed.

ACX01563

AC

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-24

10.The number of keys currently registered will be

displayed. To register an additional key, replace
the ignition key with the next key to be registered
within five seconds and then press the "YES" key.
Key ID registration screen will be displayed, then
register another key.
If key ID registration is complete, press the "NO"
key.
NOTE: A maximum of eight different keys can be
registered.

11.This completes the registration operation. Turn

the ignition switch "LOCK" (OFF) and leave it off
for approximately ten seconds.

12.Check that the engine can be started with each of

the ignition keys.

13.Check that the immobilizer system diagnosis

code and MPI system diagnosis code did not set.

14.Turn the ignition switch to "LOCK" (OFF) position.
15.Disconnect M.U.T.-II.

Registration of additional keys with the
M.U.T.-II

Additional key(s) can be registered with the M.U.T.-II
while keeping all existing key data.

CAUTION

To prevent damage to M.U.T.-II, always turn the
ignition switch to "LOCK" (OFF) position before
connecting or disconnecting M.U.T.-II.
NOTE: To register additional keys with the M.U.T.-II,
no registered keys must be lost.

AC304777

Steering shaft

AB

MB991502

<Using the M.U.T.-II>

1. Connect M.U.T.-II (MB991502) to the 16-pin

diagnosis connector.

2. Turn the ignition switch to "ON" position.

AC000522AD

3. At "System Select," press "YES"

AC000523AC

4. Select "Immobilizer," press "YES".

AC000530AC

5. Select "Special Func", press "YES".

If diagnosis code No.11 exists, "Can't execute" will
be displayed. Check for diagnosis code
No.11(Refer to

P.54A-9

).