Mitsubishi Lancer Evolution IX. Manual - part 145

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-143

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) NOT USING SWS MONITOR

54B-144

INSPECTION PROCEDURE F-4: The windshield wipers does 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) NOT USING SWS MONITOR

54B-145

DIAGNOSTIC PROCEDURE

Step 1. Pulse check
Check the input signals below which are related to 
the windshield wiper.

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

Q: Is the check result normal?

All the signals are received normally : 

Go to Step 

2.

The ignition switch (ACC) signal is not received. : 

Refer to inspection procedure L-1 "The 
ignition switch (ACC) signal is not received 

P.54B-239

."

Windshield mist wiper switch signal is not 
received. : 

Refer to inspection procedure L-5 "The 

column switch (windshield wiper washer 
and rear wiper washer switch) signal is not 
received 

P.54B-249

."

Windshield intermittent wiper switch signal is not 
received. : 

Refer to inspection procedure L-5 "The 

column switch (windshield wiper washer 
and rear wiper washer switch) signal is not 
received 

P.54B-249

."

Windshield low-speed wiper switch signal is not 
received. : 

Refer to inspection procedure L-5 "The 

column switch (windshield wiper washer 
and rear wiper washer switch) signal is not 
received 

P.54B-249

."

Windshield high-speed wiper switch signal is not 
received. : 

Refer to inspection procedure L-5 "The 

column switch (windshield wiper washer 
and rear wiper washer switch) signal is not 
received 

P.54B-249

."

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.

System switch

Check condition

Ignition switch (ACC)

When turned from the 
LOCK (OFF) position to 
the ACC position.

Windshield mist wiper 
switch

When the switch is 
turned from off to on.

Windshield intermittent 
wiper switch

When the switch is 
turned from off to on.

Windshield low-speed 
wiper switch

When the switch is 
turned from off to on.

Windshield high-speed 
wiper switch

When the switch is 
turned from off to on.

AC310437

Connector: B-01 <LHD>

AB

Harness side

B-01 (GR)

AC310477

Connector: B-01 <RHD>

AD

Harness side

B-01 (GR)

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-146

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.

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.

AC310572AC

Connector: A-11X

Relay box side

Battery

29

31 30

28 27

25

26

24

21

22

23

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)