Mitsubishi Galant (2004+). Manual - part 1721

 

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Mitsubishi Galant (2004+). Manual - part 1721

 

 

DIAGNOSTIC SYSTEM

CHASSIS ELECTRICAL

54A-3

DIAGNOSTIC SYSTEM

M2540001000193

For improved serviceability, a data link connector for 
inspection with MUT-III is built into the instrument 
panel near the position of the driver's right foot.

NOTE: 

.

*

: If a diagnosis code is sent for this function, the 

display informs users whether a mechanical 
problem currently exists ("current problem"), or 
whether it previously existed ("past problem") but 
normal operation has been restored. 

x

: indicates that the diagnosis function is set.

: indicates that the diagnosis function is not set.

DIAGNOSIS FUNCTION PCM

ABS

A/C

ETACS

MULTI-CENTER 
DISPLAY 
(MIDDLE GRADE 
TYPE)

COMBIN-ATION 
METER

SRS

DTC code sent

×

×

×

×

×

×

×

Service data 
sent

×

×

×

×

Actuator test

×

×

×

×

Diagnosis 
record stored

×

×

×

×

×

×

×

Erase DTCs 
using scan tool

×

×

×

×

×

×

×

Pulse check 
using scan tool

×

Status display 
for each DTC 
code

*

 

×

×

×

×

×

Estimated 
vehicle speed 
sent 

x (via CAN)

x (via CAN)

ECU version 
number 
displayed 

x

x

BATTERY

CHASSIS ELECTRICAL

54A-4

DATA LINK CONNECTOR

BATTERY

M2540002000185

DATA LINK CONNECTOR (BLACK)

1

Diagnosis control

2

3

SWS communication line

4

Ground

5

Ground

6

CAN communication line (CAN_H)

7

PCM

8

9

ETACS

10

11

ECU optimization control

12

13

14

CAN communication line (CAN_L)

15

16

Battery power supply

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

Item

BCI Group size 86

BCI Group size 24

Voltage V

12

12

Capacity (5-hour rate Ah)

50

56

Electrolytic fluid specific gravity [fully 
charged state at 20

°

C (68

°

F)]

1.280

1.280

Reserve capacity min

90

115

Cold cranking current A (at 

18

°

C)

525

550

IMMOBILIZER SYSTEM

CHASSIS ELECTRICAL

54A-5

IMMOBILIZER SYSTEM

M2540003000111

The engine immobilizer system prevents the engine 
from starting and immobilizes the vehicle if a key 
other than the key registered for that vehicle is used 
in an attempt to start the engine after forced entry. 
The engine immobilizer system consists of the igni-
tion key, the immobilizer-ECU, and the powertrain 
control module. It works in the following way and has 
these functions:

1. After the ignition is switched on, the powertrain 

control module sends a control signal and tran-
sponder read command signal to the immobi-
lizer-ECU.

2. When the immobilizer-ECU receives the control 

signal from the powertrain control module, 
through the key ring antenna the immobi-
lizer-ECU supplies a current and sends random 
number data to the transponder in the ignition 
key.

3. The transponder uses the random number data 

to derive an ID code, which is sent to the immobi-
lizer-ECU through the key ring antenna.

4. The immobilizer-ECU compares the ID code that 

was sent with pre-registered ID codes, and if it 
matches, a control signal approving ignition is 
sent to the powertrain control module. If the ID 
code does not match (in the case of counterfeit 
ignition keys, for example), the immobilizer-ECU 
sends a control signal denying ignition to the 
powertrain control module, preventing the engine 
from starting.

5. The system is designed to be maintenance-free 

because the power source for the transponder is 
supplied by the immobilizer-ECU. Two ignition 
keys are provided, and up to eight keys can be 
registered to one vehicle (one receiver) as 
needed. There are 4 billion possible combina-
tions for the registered ID codes. In addition, one 
part of the code is changed each time the key is 
switched on, which improves security by prevent-
ing theft using a copied ID code.

NOTE: If the immobilizer-ECU is replaced or if the 
ignition key is lost, the MUT-III must be used to reset 
all transponder ID codes. During the resetting pro-
cess, all transponders must be re-registered 
because the registered ID codes will be erased.

CONSTRUCTION DIAGRAM

AC306415AB

TRANS-
PONDER

POWER
(WIRELESS)

ENCRYPTED
CODE (WIRELESS)

MUT-III

POWERTRAIN
CONTROL 
MODULE

CONTROL 
SIGNAL

IGNITION
KEY RING
ANTENNA

IMMOBILIZER- 
ECU

LIGHTING

CHASSIS ELECTRICAL

54A-6

LIGHTING

M2540004000277

EXTERIOR LIGHTS

HEADLIGHT ASSEMBLY <Except for GTS>

Two large headlight assemblies have been 
adopted each of which houses a front turn-signal 
and parking light, a front-side-maker light, and a 
front-side reflex reflector.

Double filament bulbs, multi-reflectors, and uncut 
outer lenses have been adopted for improved 
appearance. Also, the shapes of the multi-reflec-
tors have been optimised to provide a wide distri-
bution of light, thereby improving visibility for 
improved safety.

 Honeycomb cut lenses have been adopted for 
the inner lenses of the front turn-signal and park-
ing lights and of front side-marker lights, to 
improve the appearance.

Chrome color deposition extensions have been 
adopted for improved appearance.

HEADLIGHT ASSEMBLY <GTS>

Four large headlight assemblies have been 
adopted which house a front turn-signal and 
parking light, a front-side-maker light, and a 
front-side reflex reflector.

Oval projectors have been adopted as the low 
beam lights for a wide distribution of light, thereby 
improving visibility for improved safety. 
Multi-reflectors have been adopted for the high 
beam lights, and uncut lenses for the outer 
lenses for improved appearance. 

Honeycomb cut lenses have been adopted for 
the inner lenses of the front turn-signal and park-
ing lights in order to improve the appearance.

Dark color deposition extensions have been 
adopted for improved appearance.

FOG LIGHT <GTS>

The fog lights have non-faceted lenses and 
multi-reflectors.

REAR COMBINATION LIGHT <Except for GTS>

For the rear lights, combination lights have been 
adopted each of which is made up of a turn signal 
light, a tail/stoplight, a backup light, a reflex 
reflector, and a side-maker light.

A red housing is used for a more appealing look.

A combination of red-stripe lens cuts and 
multi-reflectors has achieved a high-quality atmo-
sphere.

Striped lenses with aluminum-finished 
multi-reflectors increase brightness and visibility.

REAR COMBINATION LIGHT <GTS>

For the rear lights, combination lights have been 
adopted each of which is made up of a turn signal 
light, a tail/stoplight, a backup light, a reflex 
reflector, and a side-maker light.

Clear outer lenses and dark color deposition 
extensions combined with the rear spoiler for 
integrity appearance have been adopted for 
improved exterior appearance.

The oval shape of the light emitting portion pro-
vides the appearance of oneness with the rest of 
the headlight assemblies.

Striped lenses with aluminum-finished 
multi-reflectors increase brightness and visibility.

HIGH-MOUNTED STOPLIGHT <Except for GTS>

A high-mounted stoplight of a one-bulb type has 
been adopted. Also, the location of the 
high-mounted stoplight, the rear end of the trunk 
lid, gives a sporty appearance.

Cut lens which well fits the rear combination 
lights have been adopted for improved appear-
ance.

HIGH-MOUNTED STOPLIGHT <GTS>

The adopted high-mounted stoplight of a 
high-intensity LED-type is small but has an ample 
amount of light, which contributes to high visibility 
and improved safety. 

Uncut clear lenses appearing to have depth have 
been built into the rear spoiler for improved 
appearance.

.

 

 

 

 

 

 

 

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