Mitsubishi Montero (2004+). Manual — part 515
IGNITION SWITCH
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CHASSIS ELECTRICAL
54A-29
ON-VEHICLE SERVICE
ENCRYPTED CODE REGISTRATION METHOD
M1543008100465
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
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 regis-
tered accessible.
If the ignition key, Immobilizer-ECU, powertrain control module
is replaced or an ignition key is added, encrypted codes of all
the ignition keys must be registered. (A maximum of eight dif-
ferent ignition key can be registered). Moreover, when the
immobilizer-ECU has been replaced, you will need to use scan
tool MB991958 to register the immobilizer-ECU and input the
vehicle secret code and to register the password (secret code)
that the owner specifies into the immobilizer-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 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.
MB991223
A: MB991219
B: MB991220
C: MB991221
D: MB991222
Harness set
A: Test harness
B: LED harness
C: LED harness
adapter
D: Probe
MB991223
Making voltage and
resistance measurements
during troubleshooting
A: Connect pin contact
pressure inspection
B: Power circuit
inspection
C: Power circuit
inspection
D: Commercial tester
connection
TOOL
TOOL NUMBER
AND NAME
SUPERSESSION
APPLICATION
MB991223
A
B
C
D
AC
ACX02297
THEFT ALARM
INDICATOR LIGHT
DEFROSTER NOZZLE
AC
IGNITION SWITCH
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CHASSIS ELECTRICAL
54A-30
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 immobilizer-ECU judges that an unauthorized opera-
tion is being attempted. Start-prevention mode will be set, and
engine operation will stop and all special functions will be dis-
abled. If the ignition switch is turned to "ON" position and left in
that position for approximately 20 minutes, "Unauthorized oper-
ation, start- prevention mode" will be cancelled.
KEY ID REGISTER
All ignition keys can be registered with scan tool MB991958.
Additional ignition keys can be registered with or without scan
tool MB991958.
.
Registration with scan tool
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.
NOTE:
.
•
Before registration, check that no DTC code is set. If a DTC
code is set, resolve the problem beforehand.
•
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.
•
If registering more than one key, do not disconnect scan
tool MB991958 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
.
IGNITION SWITCH
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CHASSIS ELECTRICAL
54A-31
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. Choose "Special Function" from "IMMOBILIZER" screen.
AC306409AF
MB991911
MB991824
MB991827
System select
Special function
CAN bus diagnosis
Function Select Menu
Menu
AC209666
Maintenance
AC
MFI
ELC-A/T
IMMOBILIZER
SS4II
CRUISE CNTRL
CHASSIS
BODY
System Select Menu
POWER TRAIN
AC209667
AC
Check Chart For
Problem Sy
Data List
Special
Function
Self-diagnosis
Voltmeter
Simulated Vehicle
Speed Out
Drive Recorder
Resistor
POWERTRAIN
IMMOBILIZER
IMMOBILIZER
AC207298
AD
IGNITION SWITCH
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CHASSIS ELECTRICAL
54A-32
7. Choose "Key registration" from "Special Function" screen.
8. Enter the vehicle’s password (secret code) on the "Key
registration" screen, and then click the check mark icon.
Follow the prompts on the screen to insert key(s) into the
ignition switch to begin key registration.
9. If the key ID was registered successfully, "Progress"
indication will turn active (gray). Then the registration
process completes. If the key ID failed to be registered,
"In-Complete" indication will turn active (gray).
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. Key ID
registration screen will be displayed, then register another
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 DTC and MFI system
DTC did not set.
14.If no DTC is shown, terminate scan tool MB991958.
15.Turn the ignition switch to "LOCK" (OFF) position.
16.Disconnect scan tool MB991958.
.
Registration of additional keys with scan tool
Additional key(s) can be registered with scan tool while keeping
all existing key data.
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.
NOTE: To register additional keys with scan tool, no registered
keys must be lost.
Key registration
Transponder ID
addition
POWERTRAIN
Special Function
IMMOBILIZER
Special Function
AC207299
AE
POWERTRAIN
IMMOBILIZER
Special Function
7
8
9
4
5
6
1
2
3
0
Back
Back
Space
Space
Clear
Clear
Key registration
AC207300
AC
POWERTRAIN
IMMOBILIZER
Special Function
IMMOBILIZER-ECU registration
Progress
In-Complete
Key registration
AC207302
AC
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