Mitsubishi Galant. Manual — part 614

IGNITION SWITCH

TSB Revision

CHASSIS ELECTRICAL

54A-9

When the driver's door is closed (door switch OFF)
the ignition key hole illumination light will go out 30
seconds after the door has been closed.
(The light goes out immediately if the door is locked
through the keyless entry function.)

immobilizer system

The immobilizer system consists of the ignition key,
the key ring antenna, the immobilizer-ECU, and the
PCM. The ignition key has a built-in transponder. The
key ring antenna is installed on the steering lock key
cylinder. Only the registered ignition key permits the

engine to start, therefore, the engine can never be
started by means of a forged key or by connecting
the ignition wiring directly. The system is significantly
safe and reliable against theft. In addition, the driver
has only to turn the ignition switch to the "ON"
position to activate the immobilizer system. If the
requirements for starting the engine are not satisfied,
the engine will be immobilized. If the ignition key is
lost or another ignition key is added, the encrypted
code can be registered or erased by using scan tool
MB991502.

EQUIPMENT DIAGNOSIS

IGNITION SWITCH DIAGNOSIS

M1543000700281

The Ignition key reminder torn alarms are controlled
by the Simplified Wiring System (SWS). For
troubleshooting, refer to GROUP 54B, SWS
Diagnosis

P.54B-9

.

INTRODUCTION TO IMMOBILIZER SYSTEM DIAGNOSIS

M1543009900301

CAUTION

•

The encrypted code should always be re-registered when replacing the immobilizer-ECU.

•

If the immobilizer-ECU has been replaced with a new part, the password (vehicle secret code)
which has been stored in the immobilizer-ECU for each vehicle will be replaced by a new
password (secret code) specified by the customer.

The immobilizer system consists of the immobilizer-
ECU, PCM, ignition key and ignition key ring
antenna. If the engine cannot be started by using a
registered ignition key, one of these components
may be defective. In addition, if the immobilizer

system has immobilized the engine, MFI system
DTC P1610 will be output. In this case, observe the
immobilizer system troubleshooting. Then, if a
malfunction is resolved, the MFI system DTC P1610
should not reset.

IMMOBILIZER SYSTEM DIAGNOSTIC TROUBLESHOOTING STRATEGY

M1543006900175

Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will be sure that you
have exhausted most of the possible ways to find an
immobilizer system fault.
1. Gather information about the problem from the

customer.

2. Verify that the condition described by the

customer exists.

3. Check the vehicle for any immobilizer system

DTC.

4. If you cannot verify the condition and there are no

immobilizer system DTCs, the malfunction is
intermittent. Refer to GROUP 00, How to Use
Troubleshooting/inspection Service Points

−

How

to Cope with Intermittent Malfunctions

P.00-8

.

5. If you can verify the condition but there are no

immobilizer system DTCs, or the system cannot
communicate with scan tool, refer to Symptom
Chart and find the fault

P.54A-10

.

6. If there is an immobilizer system DTC, record the

number of the DTC, then erase the DTC from the
memory using scan tool.

7. Recreate the immobilizer system DTC set

conditions to see if the same immobilizer system
DTC will set again.
(1) If the same immobilizer system DTC sets

again, perform the diagnostic procedures for
the DTC. Refer to Diagnostic Trouble Code
Chart

P.54A-10

.

(2) If you cannot get the same immobilizer system

DTC to set again, the malfunction is
intermittent. Refer to GROUP 00, How to Use

Troubleshooting/inspection Service Points

−

How to Cope with Intermittent Malfunctions

P.00-8

.

TSB Revision

CHASSIS ELECTRICAL

IGNITION SWITCH

54A-10

IMMOBILIZER SYSTEM TROUBLE CODE
DIAGNOSIS

M1543007000090

Retrieving and Erasing Immobilizer System
Diagnostic Trouble Codes

Required Special Tool:
MB991502: Scan Tool (MUT-II)

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to "LOCK" (OFF) position before
connecting or disconnecting scan too.
1. Connect scan tool MB991502 to data link connector (16

pin).

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

3. Use scan tool MB991502 to check or erase immobilizer

system diagnostic trouble codes.

4. Turn the ignition switch to "LOCK"(OFF) position.

5. Disconnect scan tool MB991502.

DIAGNOSTIC TROUBLE CODE CHART

M1543007100116

Follow the inspection chart that is appropriate for the
diagnostic trouble code.

NOTE: Diagnostic trouble code is not recorded.

SYMPTOM CHART

M1543007200232

AC002883

16PIN

MB991502

AB

DIAGNOSTIC
TROUBLE CODE NO.

DESCRIPTION

REFERENCE PAGE

11

Transponder communication system or radio interfer-
ence of encrypted code

P.54A-11

12Encrypted codes are not the same or are not registered

P.54A-14

SYMPTOMS

INSPECTION
PROCEDURE NO.

REFERENCE PAGE

Communication with scan tool MB991502 is impossible

1

P.54A-15

The ignition key cannot be registered

2

P.54A-20

Engine does not start (Cranking but no initial combustion)

3

P.54A-21

IGNITION SWITCH

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CHASSIS ELECTRICAL

54A-11

DIAGNOSTIC TROUBLE CODE PROCEDURES

DTC: 11 Transponder communication system or radio interference of encrypted code

CIRCUIT OPERATION
The ignition key is powered by the ignition key ring
antenna, and sends an encrypted code. The ignition
key ring antenna receives the encrypted code, and
determines whether the ignition key is a registered
key or not.

DTC SET CONDITION

•

If the engine is started while several ignition keys
are in the vicinity, interference between the
different keys may occur, which will cause this
code to be generated.

•

The encrypted code of the transponder is not
sent to the immobilizer-ECU immediately after
the ignition switch is turned to "ON" position.

NOTE: DTC 11 is always output together with MFI
system DTC P1610.

TROUBLESHOOTING HINTS

•

Radio interference of encrypted code

•

Malfunction of transponder

AC003968

Ignition Key Ring Antenna Circuit

AB

AC002877AB

CONNECTOR: C-89

IMMOBILIZER-ECU

AC002878

COLUMN SWITCH

CONNECTOR: C-59

AB

TSB Revision

CHASSIS ELECTRICAL

IGNITION SWITCH

54A-12

•

Malfunction of key reminder switch (ignition key ring
antenna)

•

Malfunction of immobilizer-ECU

•

Damaged wiring harness of connectors

DIAGNOSIS

Required Special Tools:

•

MB991223: Harness Set

•

MB991502: Scan Tool

STEP 1. Check that there is other key near the key in the
ignition.

Q: Is there any other key near the key in the ignition?

YES : Move the other key well away from key being used.

Confirm that diagnostic trouble code 11 is not output.

NO : Go to Step 2.

STEP 2. Check that the engine starts using the spare
ignition key which encrypted code has been registered.

Q: Does the engine start using the spare ignition key which

encrypted code has been registered?
YES : Replace the ignition key that does not work. Then

register the password (secret code) and encrypted
code. Confirm that diagnostic trouble code 11 is not
output.

NO : Go to Step 3.

STEP 3. Check that DTC11 or 12 is output.

Q: Which DTC is output, DTC 11 or 12?

DTC12 is output : Refer to DTC 12

P.54A-14

.

DTC11 is output : Go to Step 4.

STEP 4. Check the ignition key ring antenna by
backprobing.
Do not disconnect the ignition key ring antenna connector C-59
and check the resistance on the harness side connector
between terminal number 3 and terminal number 7 by
backprobing.

Q: Is the resistance less than 2 ohms?

YES : Go to Step 5.
NO : Replace the ignition key ring antenna. Confirm that

diagnostic trouble code 11 is not output.

AC002876

CONNECTOR: C-59

COLUMN SWITCH

AB