Mitsubishi Galant (2004+). Manual - part 1449

IGNITION SWITCH

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CHASSIS ELECTRICAL

54A-39

MB991223
A: MB991219
B: MB991220 
C: MB991221
D: MB991222 

Harness set

A: Test harness
B: LED harness
C: LED harness 

adapter

D: Probe

General service tool 
(jumper)

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

REPLACED BY 
MILLER TOOL 
NUMBER

APPLICATION

MB991223

A

D

C

B

AF

IGNITION SWITCH

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CHASSIS ELECTRICAL

54A-40

ON-VEHICLE SERVICE

HOW TO REGISTER ENCRYPTED CODE

M1543008100443

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 A (Vehicles with CAN 

communication system)

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, PCM is replaced, 
encrypted codes of all the ignition keys must be registered. (A 
maximum of eight different ignition key can be registered). 
Moreover, when the immobilizer-ECU has been replaced, you 
will need to use scan tool MB991958 to register the immobi-
lizer-ECU and input the vehicle secret code.
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 immobilizer indicator will 
blink for approx. 30 seconds.
NOTE: PCM 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 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 16 minutes, "Unauthorized oper-
ation, start- prevention mode" will be cancelled.

AC307460

AB

IMMOBILIZER INDICATOR LIGHT

IGNITION SWITCH

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CHASSIS ELECTRICAL

54A-41

KEY ID REGISTRATION

All ignition keys can be registered with scan tool MB991958. 
Additional ignition keys can be registered with or without scan 
tool MB991958.

.

Registration with the 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 

P.54A-10

.

1. Connect the scan tool MB991958 to the data link connector.
2. Turn the ignition switch to "ON" position.

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

IGNITION SWITCH

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CHASSIS ELECTRICAL

54A-42

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.

7. Choose "Key registration" from "Special Function" screen.

TIR

Technical Information

Retrleval

Interactive

Diagnosis

Tutorial

Maintenance

Power Down

AC207295

AB

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

Key registration

Transponder ID 

addition

POWERTRAIN

Special Function

IMMOBILIZER

Special Function

AC207299

AE