Mitsubishi Lancer Evolution IX. Manual - part 259

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-295

Step 6. Pulse check
Check the input signals from all the door switches.

OK: The M.U.T.-II/III sounds or the voltmeter 
needle fluctuates.

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.

System switch

Check condition

All of the door switches

A door is opened when 
all the doors are closed

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-296

INSPECTION PROCEDURE L-12: The front door lock actuator (LH) switch signal is not received. <LH 
drive vehicles>

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

Input signal from the front door lock actuator (LH) is 
used to operate the functions below. If the signal is 
abnormal, these functions will not work normally.

• Key reminder function

• Central door locking

• Keyless entry system

• Room lamps

POSSIBLE CAUSES

• Malfunction of the front door lock actuator (LH)

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

ETACS-ECU

DOOR LOCK
ACTUATOR
(FRONT: LH)

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

Front Door Lock Actuator Input Circuit <LHD>

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-297

DIAGNOSIS PROCEDURE

Step 1. Connector check: E-04 front door lock 
actuator (LH) connector

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the defective connector.

Step 2. Check the front door lock actuator (LH).
Refer to GROUP 42 

− Door 

P.42-31

.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Replace the front door lock actuator (RH).

Step 3. Resistance measurement at the E-04 front 
door lock actuator (LH) connector

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Resistance between E-04 front door lock actuator 

(LH) connector terminal No.1 and body earth

OK: 2 

Ω or less

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Go to Step 4.

Step 4. Check the wiring harness between E-04 
front door lock actuator (LH) connector terminal 
No.1 and body earth

NOTE: 

Prior to the wiring harness inspection, check interme-
diate connector C-17, 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.

AC310486

Harness side

AB

Connector: E-04
<LHD>

E-04(B)

Rear door (LH)

AC310486

Harness side

AB

Connector: E-04
<LHD>

E-04(B)

Rear door (LH)

AC301541GW

Connector E-04
(Harness side)

5

6

4

2

3

1

AC310486

Harness side

AB

Connector: E-04
<LHD>

E-04(B)

Rear door (LH)

AC310446

Connector: C-17

AC

<LHD>

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-298

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.

Step 6. Check the wiring harness from E-04 front 
door lock actuator (LH) connector terminal Nos.2 
and 3 to C-227 ETACS-ECU connector terminal 
Nos.35 and 36.

NOTE: 

Prior to the wiring harness inspection, check interme-
diate connector C-17, and repair if necessary.

• 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. Pulse check
Check the input signal from the front door lock actua-
tor (LH) switch.

OK: The M.U.T.-II/III sounds or the voltmeter 
needle fluctuates.

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.

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

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

AC310486

Harness side

AB

Connector: E-04
<LHD>

E-04(B)

Rear door (LH)

System switch

Check condition

Front door lock actuator 
(LH) switch

When the driver's door is 
unlocked or locked

AC310446

Connector: C-17

AC

<LHD>