Mitsubishi Montero (2004+). Manual - part 682

KEYLESS ENTRY SYSTEM

TSB Revision

BODY

42-59

• Enable the hazard answerback function when the 

doors are locked: The ETACS-ECU tone alarm will 
sound once.

• Disable the hazard answerback function when the 

doors are locked: The ETACS-ECU tone alarm will 
sound twice.

.

<How to adjust hazard answerback when the transmitter is 
used to unlock doors>
1. Remove the ignition key.
2.  Push the ”UNLOCK” button and then push the ”LOCK“ 

button within 4 seconds to 10 seconds.

3. Release the ”LOCK” button within 10 seconds after Step 2 

and then release the “UNLOCK” button. The ETACS-ECU 
tone alarm will sound, indicating that the hazard answerback 
function can be enabled or disabled when the door are 
unlocked.

• Enable the hazard answerback function when the 

doors are unlocked: The ETACS-ECU tone alarm 
will sound once.

• Disable the hazard answerback function when the 

doors are unlocked: The ETACS-ECU tone alarm 
will sound twice.

ENABLING/DISABLING THE HORN 
ANSWERBACK FUNCTION

.

1. Remove the ignition key.
2.  Push the ”UNLOCK” button and then push the ”LOCK“ 

button within 4 seconds to 10 seconds.

3. Release the ”LOCK” button within 10 seconds after Step 2 

and then release the “UNLOCK” button. The ETACS-ECU 
tone alarm will sound, indicating that the horn answerback 
function can be enabled or disabled.

• Enable the horn answerback function*: The 

ETACS-ECU tone alarm will sound once.

• Disable the horn answerback function: The 

ETACS-ECU tone alarm will sound twice.

• Enable the horn answerback function**: The 

ETACS-ECU tone alarm will sound three times.

NOTE: 

.

*: The horn will sound if "LOCK" button is pressed with the 

doors locked.

**: The horn will sound if the doors are locked with the key-

less entry system.

HOW TO REGISTER SECRET CODE

M1428001000399

Required Special Tools:

• MB991529: Diagnostic trouble code check harness

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

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

• MB991911: MUT-III Main Harness B

KEYLESS ENTRY SYSTEM

TSB Revision

BODY

42-60

Each individual secret code is registered inside the transmitter, 
and so it is necessary to resister these codes with the 
EEPROM inside the receiver in the following cases.

• When the transmitter or ETACS-ECU is replaced

• If more transmitters are to be used

• If it appears that a problem is occurring because of faulty 

registration of a code.

A maximum of four different codes can be stored in the 
EEPROM memory (four different transmitters can be used). 
When the code for the first transmitter is registered, the previ-
ously registered codes for all transmitters are cleared. There-
fore, if you are using two or more transmitters or are adding 
more transmitters, the codes for all transmitters must be regis-
tered at the same time.

When special tool MB991529 is used

1. Insert the ignition key into the key cylinder and check that 

the doors have been locked normally when the ignition key 
is turned.

2. Insert the ignition key into the key cylinder.

CAUTION

Turn the ignition switch to the "LOCK" (OFF) position and 
then connect data link connector terminal 1 to ground.
3. Connect the data link connector terminal 1 to ground.

NOTE: Connecting terminal 1 of the data link connector to 
ground will put the system in secret code registration 
standby mode.

4. Push the hazard warning light switch six times within 10 

seconds.
NOTE: At this time the code registration monitor request is 
output and becomes registration mode (all doors locked and 
then all doors unlocked).
NOTE: The hazard warning light switch is turned on and off 
alternately whenever it is pushed.

5. Press the transmitter button, and then press it two times 

within 10 seconds of the first press. This will register the 
code.

6. When registration is completed, the code registration 

monitor request is output (all doors locked and then all doors 
unlocked).

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

ACX01772AE

MB991529

AC305378

GROUND

WITHIN 10 SECONDS

HAZARD
WARNING
LIGHT
SWITCH

ON

OFF

1

2

3

4

5

6

AC

KEYLESS ENTRY SYSTEM

TSB Revision

BODY

42-61

7. If you are using two or more transmitters or have added a 

second transmitter, the same registration procedure should 
be carried out within one minute after registering the code 
for the first transmitter. After the second registration is 
completed, the code registration monitor request is output 
(all doors locked and then all doors unlocked).

8. Registration mode will be canceled under the following 

conditions:

• When the secret code for four transmitters has been regis-

tered;

• When one minute has passed after registration mode 

started;

• When the data link connector terminal 1 to ground is dis-

connected;

• When the ignition key is removed from the ignition key cylin-

der;

9. After the registration is completed, carry out the following.

CAUTION

Turn the ignition switch to the "LOCK" (OFF) position and 
then disconnect data link connector terminal 1 from 
ground.
10.Disconnect data link connector terminal 1 from ground.
11.Remove the ignition key from ignition key cylinder.
12.Close all of the doors.
13.Verify the keyless entry system operates normally.

When special tool MB991824 (V.C.I.) is used

1. Insert the ignition key into the key cylinder and check that 

the doors have been locked normally when the ignition key 
is turned.

2. Insert the ignition key into the key cylinder.

KEYLESS ENTRY SYSTEM

TSB Revision

BODY

42-62

CAUTION

Turn the ignition switch to the "LOCK" (OFF) position and 
then connect special tool MB991824 (V.C.I.) to the data link 
connector.
3. Connect special tool MB991824 (V.C.I.) to the data link 

connector. 

4. Within 10 seconds after turning the V.C.I. power supply 

switch to the "ON" position, push the hazard warning light 
switch six times.
NOTE: At this time the code registration monitor request is 
sent and becomes registration mode (all doors locked and 
then all doors unlocked). 
NOTE: The hazard warning light switch is turned ON and 
OFF alternately whenever the hazard warning light switch is 
pushed.

5. Press the transmitter button, and then press it two times 

within 10 seconds of the first press. This will register the 
code.

6. When registration is completed, the code registration 

monitor request is sent (all doors locked and unlocked).

7. If you are using two or more transmitters or have added a 

second transmitter, the same registration procedure should 
be carried out within one minute after registering the code 
for the first transmitter. After the second registration is 
completed, the code registration monitor request is sent (all 
doors locked and unlocked).

8. Registration mode will be canceled under the following 

conditions:

• When the secret code for four transmitters has been regis-

tered;

• When one minute has passed after registration mode 

started;

• When special tool MB991824 (V.C.I.) is disconnected from 

the data link connector

• When the ignition key is removed from the ignition key cylin-

der;

AC308850

MB991911

16-PIN

MB991824 

AB

AC305378

CONNECT V.C.I. AND TURN 
THE  V.C.I.  POWER SUPPLY 
SWITCH ON.

WITHIN 10 SECONDS

HAZARD
WARNING
LIGHT
SWITCH

ON

OFF

1

2

3

4

5

6

AB