Mitsubishi Lancer Evolution IX. Manual - part 142

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-131

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

DIAGNOSTIC PROCEDURE

Step 1. M.U.T.-II/III diagnosis code.
When the ignition switch is turned to the LOCK 
(OFF) position, check that the ETACS-ECU does not 
set the diagnosis code.

Q: Is the diagnosis code set?

YES : 

Refer to diagnosis code chart 

P.54B-14

.

NO : 

Go to Step 2.

Step 2. 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 

3.

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

."

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

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the 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.

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-132

Step 5. Resistance measurement at the B-01 
windshield wiper motor connector

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Continuity between B-01 windshield wiper motor 

connector terminal No.5 and body earth

OK: 2

Ω or less

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Go to Step 6.

Step 6. Check the wiring harness between B-01 
windshield wiper motor connector terminal No.5 
and body earth.

• Check the earth wires 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. Connector check: A-11X front-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Repair the connector.

AC310437

Connector: B-01 <LHD>

AB

Harness side

B-01 (GR)

AC310477

Connector: B-01 <RHD>

AD

Harness side

B-01 (GR)

4

1

2

5

3

AC301635

Connector B-01
(Harness side)

AC

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-133

Step 8. Voltage measurement at the A-11X 
front-ECU connector

(1) Remove the front-ECU, and measure at the relay 

box side.

(2) Ignition switch: ACC

(3) Check the voltage between the A-11X front-ECU 

connector terminal No.24 and body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 10.

NO : 

Go to Step 9.

Step 9. Check the wiring harness between A-11X 
front-ECU connector terminal No.24 and the 
ignition switch (ACC).

AC310572AC

Connector: A-11X

Relay box side

Battery

29

31 30

28 27

25

26

24

21

22

23

24

29

30

31

2827

25

26

21

2322

AC304768

Connector A-11X
(Relay box side)

AB

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-134

NOTE: 

Prior to the wiring harness inspection, check the 
junction block connectors C-210, C-211 and interme-
diate 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.

AC310449

Connectors: C-210, C-211 <LHD>

AF

C-210

C-211

Junction block (front view)

C-210

Harness side

10

1

6

14

5

12

13

4

11

7

2

3

8

9

C-211

Harness side

4

6 5

3

2

1

AC310459

Connectors: C-210, C-211 <RHD>

AF

C-210

C-211

Junction block (front view)

C-210

Harness side

10

1

6

14

5

12

13

4

11

7

2

3

8

9

C-211

Harness side

4

6 5

3

2

1

AC310446

Connector: C-129
<LHD>

AI

AC310454

Connector: C-129
<RHD>

AJ