Mitsubishi Lancer Evolution IX. Manual - part 174

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-259

Step 4. Check the wiring harness between C-207 
key reminder switch connector terminal No.4 and 
the body earth.

NOTE: 

Prior to the wiring harness inspection, check joint 
connector C-101 <LH drive vehicles> or C-06 <RH 
drive vehicles>, and repair if necessary.

• Check the earth wires for open circuit.

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 : 

Repair the wiring harness.

Step 5. Connector check: C-227 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the defective connector.

AC310479

AC

Connector: C-207
<LHD>

Harness side

2
7 6

1
3

5 4

AC310481AC

Harness side

Connector: C-207
<RHD>

AC310446

Connector: C-101
<LHD>

AF

Harness side

AC310456

Connector: C-06
<RHD>

AG

Harness side

AC310450

Connector: C-227

AG

Junction block 
(rear view)

Harness side

<LHD>

28

37

43

29

44

38

23

32

41

24

25

26

27

34

42

36 35

33

21

22

30

39

40

31

AC310461

Harness side

Junction block (rear view)

Connector: C-227

AF

<RHD>

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-260

Step 6. Check the wiring harness between C-207 
key reminder switch connector terminal No.6 and 
C-227 ETACS-ECU connector terminal No.30.

• Check the input line for open circuit.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the wiring harness.

Step 7. Retest the system.
Check that the key reminder switch signal is received 
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.

AC310479

AC

Connector: C-207
<LHD>

Harness side

2
7 6

1
3

5 4

AC310481AC

Harness side

Connector: C-207
<RHD>

AC310450

Connector: C-227

AG

Junction block 
(rear view)

Harness side

<LHD>

28

37

43

29

44

38

23

32

41

24

25

26

27

34

42

36 35

33

21

22

30

39

40

31

AC310461

Harness side

Junction block (rear view)

Connector: C-227

AF

<RHD>

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-261

INSPECTION PROCEDURE L-9: The hazard warning lamp switch signal is not received.

CAUTION

Whenever the ECU is replaced, ensure that the 
input signal circuit is normal.

COMMENTS ON TROUBLE SYMPTOM

Input signal from the hazard warning lamp switch is 
used to operate the functions below. If the signal is 
abnormal, these functions will not work normally.

• Keyless entry system (encrypted code registra-

tion)

• Hazard warning lamp

POSSIBLE CAUSES

• Malfunction of the hazard warning lamp switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

ETACS-
ECU

HAZARD 
WARNING 
LAMP SWITCH

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   

Hazard Warning Lamp Switch Input Circuit

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-262

DIAGNOSTIC PROCEDURE

Step 1. Connector check: C-03 hazard warning 
lamp switch connector

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the defective connector.

Step 2. Check the hazard warning lamp switch.
Refer to GROUP 54A 

− Hazard warning lamp switch 

P.54A-72

.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Replace the hazard warning lamp switch.

Step 3. Resistance measurement at the C-03 
hazard warning lamp switch connector

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Resistance between C-03 hazard warning lamp 

switch connector terminal No.2 and body earth

OK: 2 

Ω or less

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Go to Step 4.

AC310446

Connector: C-03
<LHD>

AG

Harness side

AC310454

Connector: C-03
<RHD>

AG

Harness side

AC310446

Connector: C-03
<LHD>

AG

Harness side

AC310454

Connector: C-03
<RHD>

AG

Harness side

AC301541

3

4

2 1

GZ

Connector C-03
(Harness side)