Mitsubishi Lancer Evolution IX. Manual - part 263

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-311

NOTE: 

Prior to the wiring harness inspection, check joint 
connector C-23 <RH drive vehicles>, junction block 
connector C-210 or intermediate connector C-129, 
and repair if necessary.

• Check the power supply line to the ignition switch 

(ACC) 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 7. Pulse check
Check the input of the interior lamp loaded signal.

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.

AC310456

Connector: C-23

AJ

<RHD>

C-23 (B)

Harness side

AC310448

Junction block (front view)

Connector: C-210

AK

<LHD>

Harness side

10

1

6

14

5

12

13

4

11

7

2

3

8

9

AC310458

Junction block (front view)

Connector: C-210

AH

<RHD>

Harness side

10

1

6

14

5

12

13

4

11

7

2

3

8

9

AC310446

Connector: C-129
<LHD>

AI

AC310454

Connector: C-129
<RHD>

AJ

System switch

Check condition

Interior lamp loaded 
signal

When a load is applied 
through multi-purpose 
fuse No.18

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-312

INSPECTION PROCEDURE L-16: The door lock key cylinder switch signal is not detected.

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

Input signal from the door lock key cylinder switch is 
used to operate the central door locking function. If 
the signal is abnormal, the central door locking func-
tion will not work normally.

POSSIBLE CAUSES

• Malfunction of the door lock key cylinder switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

Door Lock Key Cylinder Switch Input Circuit

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

DOOR LOCK
KEY CYLINDER
SWITCH 

ETACS-ECU

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-313

DIAGNOSIS PROCEDURE

Step 1. Connector check: E-12 door lock key 
cylinder switch connector

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the defective connector.

Step 2. Check the door lock key cylinder switch.
Refer to GROUP 42 

− Door 

P.42-31

.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Replace the door lock key cylinder switch.

Step 3. Resistance measurement at the E-12 door 
lock key cylinder switch connector

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Resistance between E-12 door lock key cylinder 

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.

AC310488

Harness side

AC

Connector: E-12
<LHD>

E-12(B)

Front door (RH)

AC310498

Harness side

AB

Connector: E-12
<RHD>

E-12(B)

AC310488

Harness side

AC

Connector: E-12
<LHD>

E-12(B)

Front door (RH)

AC310498

Harness side

AB

Connector: E-12
<RHD>

E-12(B)

AC301541DM

Connector E-12
(Harness side)

3

1

2

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-314

Step 4. Check the wiring harness between E-12 
door lock key cylinder switch connector terminal 
No.2 and body earth.

NOTE: 

Prior to the wiring harness inspection, check interme-
diate connector C-110 <LH drive vehicles> or C-17 
<RH drive vehicles>, and repair if necessary.

• Check the earth wires for open circuit.

Q: Is the check result normal?

YES : 

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.

AC310488

Harness side

AC

Connector: E-12
<LHD>

E-12(B)

Front door (RH)

AC310498

Harness side

AB

Connector: E-12
<RHD>

E-12(B)

AC310452

Connector: C-110

AG

<LHD>

AC310454

Connector: C-17

AK

<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