Mitsubishi Lancer Evolution IX. Manual - part 254

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-275

COMMENTS ON TROUBLE SYMPTOM

Input signal from the power window main switch is 
used in order to check the power window main 
switch and confirm how the system is communicating 
with the ETACS-ECU. If the communication line is 
defective, the power windows will not work normally.

POSSIBLE CAUSES

• Malfunction of the power window main switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Check the operation by using the power 
window main switch.
Check if each window can be operated by means of 
the power window main switch.

Q: Can each power window be operated by means of 

the power window main switch?
YES : 

Go to Step 2.

NO : 

Refer to Inspection Procedure D-1 "Power 
windows do not work at all 

P.54C-86

."

Step 2. Connector check: C-228 ETACS-ECU 
connector and E-05 power window main switch 
connector

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the defective connector.

AC310450

Connector: C-228

AH

Junction block 
(rear view)

Harness side

<LHD>

51

52

53

54

55

56

57

58

59

58 5756 55 54 53 52 51 60

74 7372

71 70 69

AC310461

Harness side

Junction block (rear view)

Connector: C-228

AG

<RHD>

51

52

53

54

55

56

57

58

59

58 5756 55 54 53 52 51 60

74 7372

71 70 69

AC310484

Harness side

AC

Connector: E-05 <LHD>

10

1

6

14

5

12

13

4

11

7

2

3

8

9

Front door (LH)

AC310493

AC

Connector: E-05
<RHD>

Harness side

10

1

6

14

5

12

13

4

11

7

2

3

8

9

Front door (RH)

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-276

Step 3. Check the wiring harness between C-228 
ETACS-ECU connector terminal No.59 and E-05 
power window main switch connector terminal 
No.4.

NOTE: 

Prior to the wiring harness inspection, check interme-
diate connector C-17 <LH drive vehicles> or C-110 
<RH drive vehicles> and joint connector C-101, and 
repair if necessary.

• Check the communication lines for open circuit.

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the wiring harness.

AC310450

Connector: C-228

AH

Junction block 
(rear view)

Harness side

<LHD>

51

52

53

54

55

56

57

58

59

58 5756 55 54 53 52 51 60

74 7372

71 70 69

AC310461

Harness side

Junction block (rear view)

Connector: C-228

AG

<RHD>

51

52

53

54

55

56

57

58

59

58 5756 55 54 53 52 51 60

74 7372

71 70 69

AC310484

Harness side

AC

Connector: E-05 <LHD>

10

1

6

14

5

12

13

4

11

7

2

3

8

9

Front door (LH)

AC310493

AC

Connector: E-05
<RHD>

Harness side

10

1

6

14

5

12

13

4

11

7

2

3

8

9

Front door (RH)

AC310446

Connector: C-17

AC

<LHD>

AC310456

Connector: C-110

AE

<RHD>

AC310446

Connector: C-101
<LHD>

AF

Harness side

AC310456

Connector: C-101
<RHD>

AF

Harness side

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-277

Step 4. Replace the power window main switch, 
and then retest the system.
Replace the power window main switch, and check 
that the power window main switch signal is 
received.
(1) Replace the power window main switch.

(2) Check that the power window main switch signal 

is received.

Q: Is the check result normal?

YES : 

The procedure is complete.

NO : 

Replace the ETACS-ECU.

INSPECTION PROCEDURE L-8: The rear fog 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 rear fog lamp switch is used to 
operate the rear fog lamps. If the signal is abnormal, 
the rear fog lamps will not illuminate and extinguish 
normally.

POSSIBLE CAUSES

• Malfunction of the fog lamp switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

ETACS-
ECU

FOG LAMP
SWITCH

<LHD>

<RHD>

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

Rear Fog Lamp Switch Input Circuit

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-278

DIAGNOSIS PROCEDURE

Step 1. Connector check: C-20 fog lamp switch 
connector

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the defective connector.

Step 2. Check the rear fog lamp switch.
Refer to GROUP 54A 

− Rear fog lamp 

P.54A-64

.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Replace the fog lamp switch.

Step 3. Resistance measurement at the C-20 fog 
lamp switch connector

(1) Remove the fog lamp switch, and measure at the 

wiring harness side.

(2) Continuity between C-20 fog lamp switch 

connector terminal No.6 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

Harness side

AH

Connector: C-20
<LHD>

AC310456

Harness side

AI

Connector: C-20
<RHD>

AC310446

Harness side

AH

Connector: C-20
<LHD>

AC310456

Harness side

AI

Connector: C-20
<RHD>

AC301541HA

Connector C-20
(Harness side)