Mitsubishi Lancer Evolution IX. Manual - part 146

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-147

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.

Step 8. Connector check: B-01 windshield wiper 
motor connector

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

Repair the defective connector.

Step 9. 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 10

NO : 

Replace the windshield wiper motor 
assembly.

Step 10. Connector check: A-11X front-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 11.

NO : 

Repair the defective connector.

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

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) NOT USING SWS MONITOR

54B-148

Step 11. Check the wiring harness between A-11X 
front-ECU connector terminal No.28 and B-01 
windshield wiper motor connector terminal No.2.

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 12.

NO : 

Repair the wiring harness.

Step 12. 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

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-149

INSPECTION PROCEDURE F-5: The intermittent wiper interval can not be adjusted by operating the 
windshield intermittent wiper volume control.

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

The column switch or the front-ECU may be defec-
tive.

POSSIBLE CAUSES

• Malfunction of the column switch

• Malfunction of the front-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

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

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 (IG1) signal is not received. : 

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

P.54B-239

."

The windshield wiper volume signal is not 
received. : 

Refer to inspection procedure L-6 "The 

windshield intermittent wiper volume signal 
is not received 

P.54B-250

."

Step 2. Retest the system.
Check that the windshield intermittent wiper interval 
can be adjusted by operating the windshield intermit-
tent wiper volume control.

OK: The intermittent wiper interval is 
changed as the intermittent wiper volume is 
rotated.

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

ETACS-ECU

WINDSHIELD WIPER 
INTERMITTENT VOLUME

INPUT SIGNAL

Windshield Wiper Intermittent Volume Input Signal

System switch

Check condition

Ignition switch (ACC)

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

Windshield intermittent 
wiper volume

When the windshield 
intermittent wiper volume 
is rotated from "FAST" to 
"SLOW" (a pulse is sent 
around the volume 
middle position)

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-150

INSPECTION PROCEDURE F-6: The intermittent wiper interval is not changed according to the 
vehicle speed.

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

The ETACS-ECU calculates the intermittent wiper 
interval according to the vehicle speed signal which 
is sent by the vehicle speed sensor.
If the intermittent wiper interval does not depend on 
the vehicle speed, the input circuit of the vehicle 
speed signal and the ETACS-ECU may be defective.

POSSIBLE CAUSES

• Malfunction of the vehicle speed signal (vehicle 

speed sensor)

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Check the adjustment function.
Check that the vehicles speed sensing function has 
been enabled by using the adjustment function.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Enable the vehicles speed sensing function 
by using the adjustment function (Refer to 

P.54B-302

).

Step 2. Retest the system.
Check that the windshield intermittent wiper interval 
can be adjusted by operating the windshield intermit-
tent wiper volume control.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Refer to Inspection Procedure F-5 "The 
intermittent wiper interval can not be 
adjusted by operating the windshield 
intermittent wiper volume control 

P.54B-149

."

Step 3. Pulse check
Check the input signals below which are related to 
the vehicle speed-dependent intermittent wiper.

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

ETACS-ECU

VEHICLE SPEED

INPUT SIGNAL

Vehicles Speed Input Signal

System switch

Check condition

Ignition switch (ACC)

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

Vehicle speed signal 
(engine-ECU)

When the vehicle speed 
has reached 10 km/h or 
more