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Mitsubishi Montero (2004+). Manual - part 516

IGNITION SWITCH

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CHASSIS ELECTRICAL

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1. Connect scan tool MB991958 to the 16-pin data link

connector.

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

NOTE: Before registration, check that no DTC code is set. If
a DTC code is set, resolve the problem beforehand.

3. Carry out steps 3 to 6 of the sub-section "Registration with

scan tool."

4. Choose "Transponder ID addition" from "Special Function"

screen.

5. Enter the vehicles password (secret code) on the

"Transponder ID addition" screen, and then click the check
mark icon.

6. If an additional registration is made successfully, the screen

will ask if another key is registered or not. If the third ignition
key is registered, remove the key, which has been
registered. Then insert the third key within five seconds, and
then turn it to the ON position.

7. Register the additional ignition key according to step 6

above. The number of the registered ignition keys are
shown on "The number of registered key" screen.
NOTE: A maximum of eight different keys can be registered.

AC306409AF

MB991911

MB991824

MB991827

Key registration

Transponder ID

addition

POWERTRAIN

Special Function

IMMOBILIZER

Special Function

AC207299

key registration

Transponder ID

addition

POWERTRAIN

IMMOBILIZER

Password

Special Function

Back

Space

Clear

Trasponder ID addition

AC207301

AC209775

POWERTRAIN

IMMOBILIZER

Key ID register

ey ID register

The number of registered key

Progre

Special Function

Trasponder ID addition

About Additional T

About Additional Transponder

ransponder

ID SET

If register another key ID, press the

If register another key ID, press the
OK button after inserting a new key

OK button after inserting a new key
within 5 sec and turning on IG-SW

within 5 sec and turning on IG-SW.

IGNITION SWITCH

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8. This completes the registration operation. Turn the ignition

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

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

ignition keys.

10.Check that the immobilizer system DTC and MFI system

DTC did not set.

11.If not DTC is shown, terminate scan tool MB991958.
12.Turn the ignition switch to "LOCK" (OFF) position.
13.Disconnect scan tool MB991958.

Registration of additional key(s) without using scan tool
If scan tool is not available, new key(s) can be registered by
operating two keys which have been registered to the vehicle
(A maximum of eight keys can be registered to one vehicle).
Follow the procedure below to register new key(s) to the vehi-
cle.
NOTE: The registered key is the key that allows you to start the
engine.
1. Turn on the ignition switch by using the first registered key

(key A), and wait for five seconds.

2. Within 30 seconds, remove the key.
3. Within seven seconds after the ignition switch has been

turned to the "LOCK" (OFF), insert the second registered
key (key B) and turn on the ignition switch again. Now the
theft-alarm indicator light should blink twice for one second.
If it does not blink, you has failed to register. Repeat from
step 1.

4. Turn on the key B. Within 30 seconds, remove the key.
5. Within seven seconds after the ignition switch has been

turned to the "LOCK" (OFF) position, turn on the ignition
switch by using a new key.

6. The immobilizer-ECU identifies the new key to accept or

reject it, and operates the theft-alarm indicator (See the
table below).

The new key is:

Registration is: Additional

registration mode:

Theft-alarm indicator:

Not registered yet

Accepted

Continues

Comes on for 3 seconds after the ECU
judges that the key has not been
registered yet.

Already registered

Rejected

Continues

Comes on for 3 seconds after the ECU
judges that the key has already been
registered

Read error

Rejected

Continues

Blinks three times after the ECU has failed
to identify the key.

Eight ignition keys have
been registered

Rejected

Continues

Does not come on and blink

ACX02297

THEFT ALARM

INDICATOR LIGHT

DEFROSTER NOZZLE

IGNITION SWITCH

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7. A maximum of eight ignition keys can be registered to one

vehicle (If you attempt to register the ninth key, the
immobilizer-ECU rejects the key). Follow the procedure
below to register another new key.

(1) Within 30 seconds after the new key has been registered

on step 6, remove the key.

(2) Within seven seconds after the ignition switch has been

turned to the "LOCK" (OFF), insert another new key and
turn on the ignition switch.

(3) To register more other ignition key(s), repeat steps 1 and

8. If any of the following conditions are satisfied, the additional

key registration mode will terminate:

• The ignition switch has been on for more than 30 seconds.

• After the ignition key has been turned to the "LOCK" (OFF),

the engine control relay is turned off.

• The scan tool has started communicating with vehicle sys-

tems.

9. After the registration mode has terminated, the additionally

registered key(s) should allow you to start the engine.

TRANSPONDER LOCK CHECK

M1543024100153

Required Special Tools:

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

CAUTION

To prevent damage to scan tool MB991958, always turn the
ignition switch to "LOCK" (OFF) position before connect-
ing or disconnecting scan tool MB991958.
Follow the procedure below to judge if the ignition key can be
overwritten (i.e. the ignition key is correct) or not.

IGNITION SWITCH

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1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to "ON" position.
3. Select "Interactive Diagnosis" from the start-up screen.

4. Select "System select."

5. Choose "IMMOBILIZER" from the "POWER TRAIN" tab.

6. Select "Data List."

AC306409AF

MB991911

MB991824

MB991827

System select

Special function

CAN bus diagnosis

Function Select Menu

Menu

AC209666

Maintenance

MFI

ELC-A/T

IMMOBILIZER

SS4II

CRUISE CNTRL

CHASSIS

BODY

System Select Menu

POWER TRAIN

AC209667

Check Chart For

Problem Sy

Data List

Special Function

Self-diagnosis

Voltmeter

Simulated Vehicle

Speed Out

Drive Recorder

Resistor

POWERTRAIN

IMMOBILIZER

AC210932

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