Mitsubishi Lancer (4A9 engine). Manual — part 237

SECURITY ALARM

CHASSIS ELECTRICAL

54A-610

SECURITY ALARM SIREN REMOVAL
AND INSTALLATION

M1547005000126

Pre-removal operation
• Removal of brake booster assembly (Refer to GROUP

35A

− Master Cylinder Assembly and Brake Booster

Assembly ) <RHD>

• Removal of ABS-ECU or ASC-ECU harness connector

(Refer to GROUP 35B

− Hydraulic Unit or GROUP 35C-

Hydraulic Unit ) <LHD>

Post-installation operation
• Installation of brake booster assembly (Refer to GROUP

35A

− Master Cylinder Assembly and Brake Booster

Assembly ) <RHD>

• Installation of ABS-ECU or ASC-ECU harness connector

(Refer to GROUP 35B

− Hydraulic Unit or GROUP 35C-

Hydraulic Unit ) <LHD>

ACA00466

9.0 ± 3.0 N·m

9.0 ± 3.0 N·m

2

4

3

AC

Clip

18 ± 7 N·m <RHD>

18 ± 7 N·m <LHD>

1

Removal Steps

1.

Security alarm siren assembly

2.

Security alarm siren bracket

3.

Security alarm siren

4.

Sub harness

Removal Steps (Continued)

SECURITY ALARM

CHASSIS ELECTRICAL

54A-611

INSPECTION

LIN CUTOFF CONTROL UNIT CHECK

M1547005600043

CONTINUITY CHECK
Remove the LIN cutoff control unit.(Refer to )

RELAY CHECK
Remove the LIN cutoff control unit.(Refer to )

SECURITY INDICATOR CHECK

M1547005500035

1. Remove the centre panel.

2. Connect the battery (+) terminal with the centre

panel connector terminal No. 15. Then, check if
the security indicator is illuminated when the
battery (

−) terminal and the centre panel unit

connector terminal No. 12 are connected.

3. If the security indicator is illuminated, it is judged

good.

NOTE: Make sure that the polarity is correct.

Terminal number

Measurement value

5 to 3

Continuity exists (2

Ω or

less)

AC900636AB

System voltage

Terminal
number

Normal
condition

At no energisation

5 to 7

No
continuity

With current supply
[terminal 1 (+), terminal 8
(

−)]

Continuity
exists (2

Ω

or less)

AC609727AB

54B-1

GROUP 54B

LOCAL

INTERCONNECT

NETWORK (LIN)

CONTENTS

GENERAL INFORMATION . . . . . . . .

54B-2

SPECIAL TOOLS. . . . . . . . . . . . . . . .

54B-3

TROUBLESHOOTING . . . . . . . . . . . .

54B-3

DIAGNOSIS CODE CHART . . . . . . . . . . . .

54B-3

DIAGNOSIS FUNCTION. . . . . . . . . . . . . . .

54B-4

DIAGNOSIS CODE PROCEDURES . . . . .

54B-5

CODE NO. U0169 SUNROOF-ECU TIME-OUT

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54B-5

CODE NO. U0215 POWER WINDOW MAIN SWITCH
TIME-OUT. . . . . . . . . . . . . . . . . . . . . . . . . .

54B-7

CODE NO. U0231 RAIN LIGHT SENSOR TIMEOUT

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54B-10

CODE No. U1006 Theft alarm siren LIN timeout

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54B-12

CODE No. U1007 Theft alarm sensor LIN timeout

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54B-15

CODE NO. U1109 COLUMN SWITCH TIME-OUT

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54B-18

CODE NO. U150B COLUMN SWITCH CHECKSUM
ERROR . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54B-20

CODE NO. U150C POWER WINDOW MAIN SWITCH
CHECKSUM ERROR . . . . . . . . . . . . . . . . .

54B-20

CODE NO. U1511 SUNROOF-ECU CHECKSUM
ERROR . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54B-20

CODE NO. U1512 RAIN LIGHT SENSOR CHECKSUM
ERROR . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54B-21

CODE NO. U1514 BIT ERROR (LIN) . . . . .

54B-21

CODE NO. U1515 BUS ERROR (LIN) . . . .

54B-22

CODE NO. U1539 Theft alarm siren LINchecksum

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54B-26

CODE NO. U1540 Theft alarm SNSR LINchecksum

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54B-26

GENELAL INFORMATION

LOCAL INTERCONNECT NETWORK (LIN)

54B-2

GENELAL INFORMATION

M1545110000532

LIN refers to "Local Interconnect Network" that is the
serial multiplex communication protocol

*

adminis-

tered by LIN consortium. A communication circuit
employing the LIN protocol connects each ECU, and
switch and sensor data can be shared among ECUs,
which enables more reduction in wiring.

NOTE:

*

: The communications protocol has been

decided in detail, from software matters such as the
necessary transmission rate for communication, the
system, data format, and communication timing con-
trol method to hardware matters such as the harness
type and length and the resistance values.

STRUCTURE

ACA00693

ETACS-ECU

Column switch
(column-ECU)

Sunroof-ECU
<Vehicles with
sunroof>

Slave ECU

Security alarm siren

LIN cutoff control unit

Slave ECU

Security alarm sensor

Slave ECU

Slave ECU

Slave ECU

Slave ECU

Master ECU

LIN bus line

Power window
main switch

Lighting control
sensor
<Vehicles with
auto lamp>

<Vehicles with security alarm sensor>

AB

Master and slave ECUs are connected to the LIN
bus lines. The master ECU is the ETACS

*1

-ECU,

and the slave ECUs are the column switch (column-
ECU), the sunroof-ECU*2, the lighting control sen-
sor*3, the power window main switch, the security
alarm siren (via LIN cutoff control unit

*4

)

*5

and the

security alarm sensor

*5

. The master ECU requests

these slave ECUs to communicate each other via
communication lines.

NOTE:

.

•

*1

: ETACS (Electronic Time and Alarm Control

System)

•

*2

: Vehicles with sunroof

•

*3

: Vehicles with lighting control sensor

•

*4

: The LIN cutoff control unit is a relay circuit to

turn ON/OFF the LIN communication of security
alarm siren. An ECU is not incorporated in the
LIN cutoff control unit.

•

*5

: Vehicles with security alarm sensor