Mitsubishi Grandis. Manual - part 191

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-226

Step 8. Check the wiring harness between A-34 
windshield washer motor connector terminal 
No.2 and C-220 ETACS-ECU connector terminal 
No.23.

NOTE: 

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

• Check the earth wires for open circuit.

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

Repair the wiring harness.

Step 9. Connector check: A-15X front-ECU 
connector.

Q: Is the check result normal?

YES : 

Go to Step 10.

NO : 

Repair the connector.

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>

AC311521AC

Connector: A-15X

Relay box side

21

22

23

24

25

26

27

28

29

30

31

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-227

Step 10. Check the wiring harness between A-34 
windshield washer motor connector terminal 
No.1 and A-15X front-ECU connector terminal 
No.21.

• Check the power supply line for open circuit.

Q: Is the check result normal?

YES : 

Go to Step 11.

NO : 

Repair the wiring harness.

Step 11. Retest the system.

The windshield washer should now work 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 front-ECU.

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

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-228

REAR WIPER AND WASHER

Inspection Procedure H-1: The rear wiper does not work at all.

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

If the rear wiper does not work normally, the input 
signal circuits to the components below, the rear 
wiper motor or the ETACS-ECU may be defective.

• Ignition switch (ACC)

• Rear wiper switch

POSSIBLE CAUSES

• Malfunction of the rear wiper motor

• Malfunction of the column switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

IGNITION
SWITCH (ACC)

REAR
WIPER RELAY

REAR
WIPER MOTOR

ETACS-ECU

J/B SIDE

REAR WIPER SWITCH

INPUT SIGNAL

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

Rear Wiper Drive Circuit

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-229

DIAGNOSIS PROCEDURE

Step 1. ECU check by using the SWS monitor.

Check that the power supply and earth lines to the 
column switch (column-ECU) and the ETACS-ECU 
and the SWS communication lines are normal.

• Ignition switch: ACC

ECUS TO BE CHECKED

• COLUMN ECU

• ETACS ECU

OK: "OK" are displayed for all the items

Q: Are the check result normal?

"OK" are displayed for all the items : 

Go to Step 2.

"NG" is displayed on the "COLUMN ECU" menu. : 

Refer to Inspection Procedure A-2 
"Communication with the column switch 
(column-ECU) is not possible 

P.54C-56

."

"NG" is displayed on the "ETACS ECU" menu. : 

Refer to Inspection Procedure A-3 
"Communication with the ETACS-ECU is 
not possible 

P.54C-63

."

Step 2. Function diagnosis by using the SWS 
monitor

Check the SWS communication signal, which are 
related to the rear wiper function.

<Selected item> REAR WIPER

• Ignition switch: ACC

• Rear wiper switch: ON

OK: Normal conditions are displayed for all 
the items.

Q: Are the check result normal?

Normal conditions are displayed for all the items : 

Go to Step 3.

Normal condition is not displayed for item No.13 : 

Replace the column switch.

Normal condition is not displayed for item No.31 : 

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

P.54C-456

."

Step 3. Connector check: G-05 rear wiper motor 
connector.

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the connector.

Step 4. Check the rear wiper motor.
Refer to GROUP 51 

− Rear wiper and washer 

P.51-32

.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Replace the rear wiper motor.

Step 5. Resistance measurement at the G-05 rear 
wiper motor connector.

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Resistance between G-05 rear wiper motor 

Item No.

Item name

Normal 
condition

Item 13

REAR WIPER SW

ON

Item 31

IG SW (ACC)

ON

AC310222

Connector: G-05 

AH

Harness side

AC310222

Connector: G-05 

AH

Harness side

AC310506

Connector G-05
(Harness side)

BS