Mitsubishi Grandis. Manual - part 61

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-241

YES : 

The trouble can be an intermittent 

malfunction (Refer to GROUP 00 

− How to 

Cope with Intermittent Malfunction 

P.00-5

).

NO : 

Replace the ETACS-ECU.

INSPECTION PROCEDURE H-4: The rear washer does not work.

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

If the rear washer does not work normally, the input 

signal circuits to the washer switch, rear washer 
motor or the ETACS-ECU may be defective.

IGNITION
SWITCH (ACC)

ETACS-ECU

J/B SIDE

INPUT SIGNAL

REAR WASH. SW

WASHER
MOTOR

FRONT-ECU

REAR WASHER
RELAY

WINDSHIELD
WASHER RELAY

Rear Washer Drive Circuit

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

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-242

POSSIBLE CAUSES

• Malfunction of the washer motor

• Malfunction of the column switch

• Malfunction of the ETACS-ECU

• Malfunction of the front-ECU

• Damaged harness wires and connectors

Step 1. Confirm the operation of the rear wiper.
Check that the rear wiper work normally.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Refer to Inspection Procedure H-1 "The rear 
wiper does not work at all 

P.54B-230

."

Step 2. Pulse check
Check the input signals below which are related to 
the rear washer.

• Ignition switch: ACC

OK: The MUT-III sounds or the voltmeter 
needle fluctuates.

Q: Are the check result normal?

YES : 

Go to Step 3.

NO : 

Refer to inspection procedure Q-7 "The 
column switch (windshield wiper washer 
and rear wiper washer switch) signal is not 
received 

P.54B-439

."

Step 3. Connector check: A-34 washer motor 
connector

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the connector.

Step 4. Check the washer motor.
Refer to GROUP 51 

− Rear wiper and washer 

P.51-29

.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Replace the washer motor.

System switch

Check condition

Column switch (rear 
washer switch)

When the switch is 
turned from off to on

AC310401

Connector: A-34 <LHD>

Harness side

A-34 (GR)

AF

AC310396

Connector: A-34 <RHD>

Harness side

A-34 (GR)

AF

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-243

Step 5. Check the wiring harness between A-34 
washer motor connector terminal No.1 and A-15X 
front-ECU connector No.21.

• Check the earth line for open or short circuit.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the wiring harness.

Step 6. Connector check: C-220 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the connector.

AC311521AC

Connector: A-15X

Relay box side

21

22

23

24

25

26

27

28

29

30

31

AC310401

Connector: A-34 <LHD>

Harness side

A-34 (GR)

AF

AC310396

Connector: A-34 <RHD>

Harness side

A-34 (GR)

AF

AC310626

Connector: C-220 <LHD>

Junction block (Rear view)

AE

Harness side

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

AC310620

Connector: C-220 <RHD>

Junction block (Rear view)

AD

Harness side

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-244

Step 7. Check the wiring harness between C-220 
ETACS-ECU connector terminal No.23 and A-34 
washer motor connector terminal No.2.

NOTE: 

Prior to the wiring harness inspection, check 
intermediate connector C-125 and repair if 
necessary.

• Check the output signal line.

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Repair the wiring harness.

Step 8. Retest the system.

Check that the rear washer works normally.

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 ETACS-ECU.

AC310401

Connector: A-34 <LHD>

Harness side

A-34 (GR)

AF

AC310396

Connector: A-34 <RHD>

Harness side

A-34 (GR)

AF

AC310626

Connector: C-220 <LHD>

Junction block (Rear view)

AE

Harness side

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

AC310620

Connector: C-220 <RHD>

Junction block (Rear view)

AD

Harness side

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

AC310613

AD

Connector: C-125 <LHD>

AC310628AB

Connector: C-125 <RHD>