Mitsubishi Galant 9G. Manual — part 1539

IGNITION SWITCH

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CHASSIS ELECTRICAL

54A-28

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

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

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

• MB991827: MUT-III USB Cable

• MB991910: MUT-III Main Harness A (Vehicles with CAN

communication system)

STEP 1. Check the battery voltage.
Measure the battery voltage during cranking.
Q: Is the voltage 8 volts or more?

YES : Go to Step 2.
NO : Check the condition of the battery. Refer to

P.54A-5

.

STEP 2. Using scan tool MB991958, read the diagnostic
trouble code.

CAUTION

To prevent damage to scan tool MB991958, always turn the
ignition switch to "LOCK" (OFF) position before connect-
ing or disconnecting scan tool.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch "ON" position.
(3) Read the diagnosis code.
Q: Have any DTCs set?

Yes : Refer to

P.54A-12

.

No : Go to Step 3.

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

IGNITION SWITCH

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CHASSIS ELECTRICAL

54A-29

STEP 3. Using scan tool MB991958, read the MFI system
diagnostic trouble code.

CAUTION

To prevent damage to scan tool MB991958, always turn the
ignition switch to "LOCK" (OFF) position before connect-
ing or disconnecting scan tool.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch "ON" position.
(3) Read the diagnosis code.
Q: Have any MFI system DTCs set?

Yes : Refer to GROUP 13A, MFI Diagnosis

− Diagnostic

Trouble Code Chart

P.13A-789

or GROUP 13B, MFI

Diagnosis

− Diagnostic Trouble Code Chart

P.13B-853

.

No : Go to Step 4.

STEP 4. Attempt to start the engine.
Q: Does the engine start?

YES : The procedure is complete (If no malfunctions are

found in all steps, an intermittent malfunction is
suspected. Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points-How to
Cope with Intermittent Malfunction

P.00-14

).

NO : Refer to GROUP 13A, MFI Diagnosis

− Symptom

Chart

P.13A-38

or GROUP 13B, MFI Diagnosis

−

Symptom Chart

P.13B-38

. If the malfunction is not

resolved, replace the immobilizer-ECU. Then register
the password (secret code) and encrypted code.
(Refer to

P.54A-37

.) The engine should now start.

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

IGNITION SWITCH

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CHASSIS ELECTRICAL

54A-30

INSPECTION PROCEDURE 4: The Immobilizer Indicator Light does not Illuminate.

BATTERY

RELAY
BOX

JOINT
CONNECTOR (1)

COMBINATION
METER

IMMOBILIZER
-ECU

IMMOBILIZER

Immobilizer Indicator Light Circuit

IGNITION SWITCH

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CHASSIS ELECTRICAL

54A-31

.

CIRCUIT OPERATION

If the requirements for starting the engine are not sat-
isfied, the immobilizer-ECU flashes the immobilizer
indicator for 30 seconds.

.

TECHNICAL DESCRIPTION (COMMENT)

The immobilizer indicator light or a malfunction of the
combination meter or immobilizer-ECU.

.

TROUBLESHOOTING HINTS

• Malfunction of combination meter

• Malfunction of immobilizer-ECU

• The wiring harness or connectors may have

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

.

DIAGNOSIS

Required Special Tool:

• MB991223: Harness Set

STEP 1. Check immobilizer-ECU connector C-124 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector
Q: Is immobilizer-ECU connector C-124 in good condition?

YES : Go to Step 2.
NO : Repair or replace the component(s). Refer to GROUP

00E, Harness Connector Inspection

P.00E-2

. Confirm

that scan tool MB991958 communicates normally.

AC305231

C-29

CONNECTORS: C-01, C-29, C-101, C-124

C-01

C-124

C-101

CU

AC305231CQ

CONNECTOR: C-124

HARNESS SIDE