Mitsubishi Lancer Evolution IX. Manual - part 231

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-183

INSPECTION PROCEDURE H-6: The headlamp automatic shutdown function does not work normally.

CAUTION

Whenever the ECU is replaced, ensure that the 
input and output signal circuits are normal.

COMMENTS ON TROUBLE SYMPTOM

The ETACS-ECU operates this function in accord-
ance with the input signals below.

• Ignition switch (IG1)

• Driver's door switch

• Tail lamp switch

• Headlamp switch

If this function does not work normally, these input 
signal circuit(s), the front-ECU or the ETACS-ECU 
may be defective. On vehicles with keyless entry 
system, note that this function can be disabled/ena-
bled by the customize function (default setting; ena-
bled).

POSSIBLE CAUSES

• Malfunction of the driver's door switch

• Malfunction of the front-ECU

• Malfunction of the column switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Customize function by using the SWS 
monitor.
Check that the headlamp automatic shutdown func-
tion has been enabled by using the adjustment func-
tion.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Enable the headlamp automatic shutdown 
function by using the adjustment function. 
Refer to GROUP 54B 

− Configuration 

Function 

P.54B-302

.

ETACS-ECU

INPUT SIGNAL

· DRIVER'S DOOR SWITCH

· TAIL LAMP SWITCH

· IGNITION SWITCH (IG1)

· HEADLAMP SWITCH

Headlamp Automatic Shutdown Function

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-184

Step 2. ECU check by using the SWS monitor.
Check that the power supply and earth lines to the 
column switch (column-ECU), the ETACS-ECU and 
the front-ECU and the SWS communication lines are 
normal.

• Ignition switch: OFF

ECUS TO BE CHECKED

• COLUMN ECU

• ETACS ECU

• FRONT ECU

OK: "OK" is displayed for all the items

Q: Is the check result normal?

"OK" is displayed for all the items : 

Go to Step 3.

"NG" is displayed on the "COLUMN ECU" menu. : 

Refer to Inspection Procedure A-2 
"Communication with the column switch 
(column-ECU) is not possible 

P.54C-30

."

"NG" is displayed on the "ETACS ECU" menu. : 

Refer to Inspection Procedure A-3 
"Communication with the ETACS-ECU is 
not possible 

P.54C-36

."

"NG" is displayed on the "FRONT ECU" menu. : 

Refer to Inspection Procedure A-4 
"Communication with the front-ECU is not 
possible 

P.54C-42

."

Step 3. Function diagnosis by using the SWS 
monitor.
Check the SWS communication signal, which are 
related to the headlamp automatic shutdown func-
tion.

<Selected item> LIGHTING - HD AUTO-CUT

• Ignition switch: from ON to OFF

• Lighting switch: "TAIL" or "HEAD"

• Driver's door: open

OK: Normal conditions displayed for all the 
items

Q: Is the check result normal?

Normal conditions displayed for all the items : 

Go 

to Step 4.

Normal condition is not displayed for item 00 or 01. 
: 

Refer to Inspection Procedure L-4 "The 
column switch (lighting and turn-signal lamp 
switch) signal is not received 

P.54C-267

."

Normal condition is not displayed for item No.30. : 

Refer to Inspection Procedure L-2 "The 
ignition switch (IG1) signal is not received 

P.54C-261

."

Normal condition is not displayed for item No.32. : 

Refer to Inspection Procedure L-3 "The door 
switch (front: LH) signal is not received <LH 
drive vehicles>

P.54C-263

 ," or refer to 

Inspection Procedure L-3 "The door switch 
(front: RH) signal is not received <RH drive 
vehicles>

P.54C-265

 ."

Normal condition is not displayed for item 35 or 70. 
: 

Replace the front-ECU.

Step 4. Retest the system.
Check that the headlamp automatic shutdown func-
tion works normally.

Q: Is the check result normal?

YES : 

The trouble can be an intermittent 

malfunction (Refer to GROUP 00 

− How to 

Cope with Intermittent Malfunction 

P.00-5

).

NO : 

Replace the ETACS-ECU.

Item No. Item name

Normal condition

Item 00

HEADLAMP SW ON when the lighting 

switch is at HEAD

Item 01

TAIL LAMP SW

ON when the lighting 
switch is at TAIL

Item 30

IG SW(IG1)

from ON to OFF

Item 70

FRONT ECU 
ACK

SLEEP ACK or 
NORMAL ACK

Item No. Item name

Normal condition

Item 32

DR DOOR SW

ON

Item 35

HD AUTO-CUT

OFF

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-185

INSPECTION PROCEDURE H-7: Any of tail lamps, position lamps or licence plate lamps does not 

illuminate. <LH drive vehicles>

CAUTION

Whenever the ECU is replaced, ensure that the 

input and output signal circuits are normal.

FRONT-ECU

COMBINATION METER

LICENCE
PLATE
LAMP

(LH)

(RH)

Wire colour code
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue
BR : Brown     O : Orange     GR : Gray     R : Red     P : Pink     V : Violet

TAIL LAMP
RELAY

REAR
COMBINATION
LAMP
(TAIL: LH)

HEADLAMP
ASSEMBLY
(POSITION)

(LH)

(RH)

REAR
COMBINATION
LAMP
(TAIL: RH)

Taillamps, Position Lamps and License Plate Lamps Circuit <LHD>

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-186

COMMENTS ON TROUBLE SYMPTOM

If the tail lamps, the position lamps or the licence 
plate lamps do not illuminate, the wiring harness con-
nector(s), the bulb or the fuse may be defective or 
burned out.

POSSIBLE CAUSES

• Burned-out bulb

• Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

Step 1. Connector check: F-14 <tail lamp LH> or 
F-08 <tail lamp RH> rear combination lamp 
connector, A-31 <position lamp LH> or A-39 
<position lamp RH> headlamp assembly 
connector, F-11 <licence plate lamp LH> or F-10 
<licence plate lamp RH> licence plate lamp 
connector, C-02 <tail lamp indicator> 
combination meter connector

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the defective connector.

Step 2. Check the bulbs of the tail lamps, the 
position lamp, the licence plate lamp or tail lamp 
indicator.
Check the bulb of the lamp which does not illumi-
nate.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Replace the bulb of the lamp which does not 
illuminate.

AC310468

Connectors: F-08, F-10, F-11, F-14

<LHD>

AD

F-08(B)

F-10(GR)

F-11(GR)

F-14(B)

Harness side

F-08

Harness side

F-11

Harness side

F-10

Harness side

F-14

AC310542

Connectors: A-31

AD

A-31(B)

Harness side

A-31

<LHD>

AC310431

Connectors: A-39

AE

A-39(B)

Harness side

A-39

<LHD>

AC310446

Connector: C-02
<LHD>

AK

Harness side

31

35

36

37

38

39

40

41

45

46

47

48

49

50

51

34

44

33

43

32

42

C-02 (L)