Mitsubishi Lancer Evolution IX. Manual - part 224

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-155

NOTE: 

Prior to the wiring harness inspection, check the 
intermediate connector A-13 <LH drive vehicles>, 
C-31 <RH drive vehicles> and repair if necessary.

• Check the input signal lines.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the wiring harness.

Step 7. Retest the system.
Check that the windshield wipers stop at the speci-
fied park position.

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 front-ECU.

AC303857

Connector: A-13
<LHD>

AB

A-13 (B)

AC310454

Connector: C-31 <RHD>

AY

10

2

9

1

8

3

12

11

4

13

6

15

5

14

7

16

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-156

INSPECTION PROCEDURE F-4: The windshield wipers do not work normally.

CAUTION

Whenever the ECU is replaced, ensure that the 
input and output signal circuits are normal.

COMMENTS ON TROUBLE SYMPTOM

The windshield wiper motor, the column switch or the 
front-ECU may be defective.

POSSIBLE CAUSES

• Malfunction of the windshield wiper motor

• Malfunction of the column switch

• Malfunction of the front-ECU

• Damaged harness wires and connectors

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        

CIRCUIT
BREAKER

WINDSHIELD 
WIPER MOTOR

FRONT-ECU

INPUT SIGNAL

· WINDSHIELD WIPER HI SPEED SWITCH
· WINDSHIELD WIPER INTERMIT SWITCH
· WINDSHIELD WIPER LO SPEED SWITCH
· WINDSHIELD WIPER MIST SWITCH

WIPER SPEED 
SWITCHING 
RELAY

Windshield Wiper Motor Drive Circuit

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-157

DIAGNOSIS PROCEDURE

Step 1. SWS monitor communication data.
Check the SWS communication signal, which are 
related to the windshield wipers.

<Selected item> Column switch (column-ECU)

• Ignition switch: ON

• Move the windshield wiper switch to each posi-

tion.

OK: Normal conditions are displayed for all 
the functions of the switch.

Q: Is the check result normal?

Normal conditions are displayed for all the items. : 

Go to Step 2.

NO : 

Replace the column switch

Step 2. Check the operation of the windshield 
wipers.
Check that the windshield wipers work at high speed 
and the mist mode.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Go to Step 8.

Step 3. Connector check: B-01 windshield wiper 
motor connector

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the defective connector.

Step 4. Check the windshield wiper motor 
assembly.
Refer to GROUP 51 

− Windshield wiper 

P.51-21

.

Q: Is the check result normal?

YES : 

Go to Step 5

NO : 

Replace the windshield wiper motor 
assembly.

Step 5. Connector check: A-11X front-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the defective connector.

Item No. Item name

Normal condition

Item 05

INT WIPER SW

ON

Item 06

LO WIPER SW

ON

Item 07

HI WIPER SW

ON

Item 08

MIST WIPER SW ON

AC310437

Connector: B-01 <LHD>

AB

Harness side

B-01 (GR)

AC310477

Connector: B-01 <RHD>

AD

Harness side

B-01 (GR)

AC310572AC

Connector: A-11X

Relay box side

Battery

29

31 30

28 27

25

26

24

21

22

23

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-158

Step 6. Check the wiring harness between A-11X 
front-ECU connector terminal No.27 and B-01 
windshield wiper motor connector terminal No.1.

NOTE: 

Prior to the wiring harness inspection, check the 
intermediate connector A-13 <LH drive vehicles>, 
C-31 <RH drive vehicles>, and repair if necessary.

• Check the power supply line to front-ECU 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 windshield wipers work normally by 
moving the switch to each position.

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 front-ECU.

AC310572AC

Connector: A-11X

Relay box side

Battery

29

31 30

28 27

25

26

24

21

22

23

AC310437

Connector: B-01 <LHD>

AB

Harness side

B-01 (GR)

AC310477

Connector: B-01 <RHD>

AD

Harness side

B-01 (GR)

AC310542

Connector: A-13 <LHD>

AC

A-13 (B)

AC310454

Connector: C-31 <RHD>

AY

10

2

9

1

8

3

12

11

4

13

6

15

5

14

7

16