Mitsubishi Montero (2002-2004). Manual — part 463

IGNITION SWITCH

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CHASSIS ELECTRICAL

54A-23

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 approx. 10 seconds, the theft-alarm indicator will
blink for approx. 30 seconds.
NOTE: powertrain control module has an encrypted code for
immobilizer-ECU, and the encrypted code is registered in the
immobilizer-ECU and ignition key.

POINTS TO NOTE DURING OPERATION

If none of the functions can be used, check the diagnostic trou-
ble codes, and after carrying out any necessary repairs, repeat
the operation.
If an incorrect password is input five times in a row, the immobi-
lizer-ECU judges that an unauthorized operation is being
attempted. Start-prevention mode will be set, and engine oper-
ation will stop and all special functions will be disabled. If the
ignition switch is turned to "ON" position and left in that position
for approximately 20 minutes, "Unauthorized operation, start-
prevention mode" will be cancelled.

KEY ID REGISTER

All ignition keys can be registered with scan tool MB991502.
Additional ignition keys can be registered with or without scan
tool MB991502. If an ignition key is registered using scan tool
MB991502, no registered ignition keys must be lost.

.

Registration with the scan tool

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to "LOCK" (OFF) position before connect-
ing or disconnecting scan tool MB991502.
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 registered before should be on hand before using this
function.
NOTE: If registering more than one key, do not disconnect scan
tool MB991502 halfway through the registration process.
NOTE: 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-7

.

ACX02297

THEFT ALARM

INDICATOR LIGHT

DEFROSTER NOZZLE

AC

IGNITION SWITCH

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CHASSIS ELECTRICAL

54A-24

1. Connect scan tool MB991502 to data link connector (16-

pin).

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

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

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

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

If DTC 11 exists, "Can't execute" will be displayed. Check for
DTC 11. (Refer to

P.54A-8

.)

ACX01539

16-pin

MB991502

AI

AC000522

AC

AC000523

AB

AC000530

AB

AC000518

AB

IGNITION SWITCH

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CHASSIS ELECTRICAL

54A-25

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

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.

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

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.

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.

AC101475

ACX01626AB

ACX01561AC

ACX01562AB

ACX01563 AB

IGNITION SWITCH

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CHASSIS ELECTRICAL

54A-26

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 DTC and MFI system

DTC did not set.

14.Turn the ignition switch to "LOCK" (OFF) position.
15.Disconnect scan tool MB991502.

.

Registration of additional keys with the scan tool
An additional key is registered with the scan tool while keeping
all existing key data.

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to "LOCK" (OFF) position before connect-
ing or disconnecting scan tool MB991502.
NOTE: To register additional keys with the scan tool, no regis-
tered keys must be lost.
1. Connect scan tool MB991502 to data link connector (16-

pin).

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

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

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

ACX01539

16-pin

MB991502

AI

AC000522

AC

AC000523

AB