Mitsubishi Lancer Evolution IX. Manual — part 177

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-271

NOTE:

Prior to the wiring harness inspection, check interme-
diate connector C-127 <LH> and junction block con-
nector C-217 <RH> or C-214 <LH>, and repair if
necessary.

• Check the input line for open circuit.

Q: Is the check result normal?

YES :

Go to Step 6.

NO :

Repair the wiring harness between each of
the door switches and the ETACS-ECU.

Step 6. Retest the system.
Check that all the driver's door switch signals are
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.

AC310455

Connector: C-127

AC

<RHD>

AC310459

Connectors: C-214, C-217

AB

C-217

C-214

Junction block (front view)

<RHD>

C-214
Harness side

21

7

16 15

17

18

20 19

1

2

3

4

5

6

23 22

24

25

28

26

27

9

8

10

11

14

12

13

C-217
Harness side

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-272

INSPECTION PROCEDURE L-11: 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.

• 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) NOT USING SWS MONITOR

54B-273

DIAGNOSTIC 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 (LH).

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.

AC310484

Harness side

AB

Connector: E-04 <LHD>

E-04(B)

Front door (LH)

AC310484

Harness side

AB

Connector: E-04 <LHD>

E-04(B)

Front door (LH)

AC301541GW

Connector E-04
(Harness side)

5

6

4

2

3

1

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-274

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.

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. Retest the system.
Check that the front door lock actuator (LH) 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.

AC310484

Harness side

AB

Connector: E-04 <LHD>

E-04(B)

Front door (LH)

AC310446

Connector: C-17

AC

<LHD>

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

AC310484

Harness side

AB

Connector: E-04 <LHD>

E-04(B)

Front door (LH)

AC310446

Connector: C-17

AC

<LHD>