Mitsubishi Grandis. Manual - part 190

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-222

Step 4. ETACS ANALOG data by using the SWS 
monitor.

Check the ETACS-ECU input signal related to the 
vehicle speed-dependent intermittent wiper interval.

• Set the simulated vehicle speed at approximately 

10km/h.

OK: Normal condition is displayed.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Refer to inspection procedure Q-25 "The 
vehicle speed signal is not received 

P.54C-568

."

Step 5. Retest the system.
(1) Replace the ETACS-ECU.
(2) Check that the vehicle speed-dependent 

intermittent wiper system should 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 combination meter.

Item No.

Item name

Normal condition

Item 03

SPEED SENSOR

8 

− 10 km/h

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-223

Inspection Procedure G-7: The windshield washer does not work.

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

The windshield washer motor, the column switch or 
the front-ECU may be defective.

POSSIBLE CAUSES

• Malfunction of the windshield washer motor

• Malfunction of the column switch

• Malfunction of the front-ECU

• Damaged harness wires and connectors

Windshield Washer Motor Circuit

FRONT-ECU

WINDSHIELD 
WASHER MOTOR

WINDSHIELD 
WASHER 
RELAY

INPUT SIGNAL

WINDSHIELD WASHER

IGNITION 
SWITCH (ACC)

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 
WASHER 
RELAY

ETACS-ECU

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-224

DIAGNOSIS PROCEDURE

Step 1. Check the operation of the windshield 
wipers.

Check that the windshield wipers work normally.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Refer to Inspection Procedure G-1 "The 
windshield wipers does not work at all 

P.54C-203

."

Step 2. ECU check by using the SWS monitor.

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

• Turn the ignition switch to the ACC position.

ECUS TO BE CHECKED

• COLUMN ECU

• FRONT 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 3.

"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 "FRONT ECU" menu. : 

Refer to Inspection Procedure A-4 
"Communication with the front-ECU is not 
possible 

P.54C-70

."

"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 3. Connector check: A-34 windshield 
washer motor connector.

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the connector.

Step 4. Check the windshield washer motor 
assembly.

Refer to GROUP 51 

− Windshield washer 

P.51-21

.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Replace the windshield washer motor.

Step 5. Check the operation of the rear washer.

Check that the rear washer work normally.

Q: Is the check result normal?

YES : 

Replace the front-ECU.

NO : 

Go to step 6.

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-225

Step 6. Function diagnosis by using the SWS 
monitor.

Check the SWS communication signal, which are 
related to the windshield washer function.

<Selected item> F.WIPER WASH

• Turn the ignition switch to the ACC position.

• Windshield washer switch: ON

OK: Normal condition is displayed.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Replace the column switch.

Step 7. Connector check: C-220 ETACS-ECU 
connector.

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Repair the connector.

Item No.

Item name

Normal 
condition

Item 09

FRONT WASH. 
SW

ON

AC310626

Connector: C-220 <LHD>

Junction block (Rear view)

AE

Harness side

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AC310620

Connector: C-220 <RHD>

Junction block (Rear view)

AD

Harness side

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