Mitsubishi Colt Ralliart. Manual - part 400

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-108

Step 2. ECU check by using the SWS monitor.
Check that the power supply and earth lines to the 
column switch (column-ECU), the ETACS-ECU and 
the SWS communication lines are normal.

• Turn the ignition switch to the ACC position.

ECU TO BE CHECKED

• COLUMN ECU

• ETACS ECU

OK: "OK" are displayed for all the items

Q: Are the check results 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-37

."

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

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

P.54C-41

."

Step 3. 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 4.

NO : 

Refer to Inspection Procedure N-5 "The 
column switch (windshield wiper washer 
and rear wiper washer switch) signal is not 
received 

P.54C-210

."

Step 4. Connector check: A-35 motor connector 
and B-134 ETACS-ECU connector.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair the connector.

Step 5. Check the windshield washer motor 
assembly.
Refer to GROUP 51 

− Windshield wiper and washer 

P.51-28

.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Replace the windshield washer motor.

Item No.

Item name

Normal 
condition

Item 09

FRONT WASH. 
SW

ON

AC509176

Connector: A-35

Harness side

AB

AC313872 AH

Connector: B-134

Harness side

Junction block (Rear view)

Main

Index

Group

TOC

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-109

Step 6. Check the wiring harness between A-35 
washer motor connector terminal Nos.1, 2 to 
B-134 ETACS-ECU connector terminal Nos.12, 9.

NOTE: 

Prior to the wiring harness inspection, check the 
junction block connector B-112 and repair if neces-
sary.

• Check the power supply line 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 washer works normally.

Q: Is the check result satisfactory?

YES : 

The trouble can be an intermittent 

malfunction (Refer to GROUP 00 

− How to 

use Troubleshooting/inspection Service 
Points 

− How to Cope with Intermittent 

Malfunction 

P.00-13

).

NO : 

Replace the ETACS-ECU.

AC509176

Connector: A-35

Harness side

AB

AC313872 AH

Connector: B-134

Harness side

Junction block (Rear view)

AC313870

Connector: B-112

BE

Junction block (Front view)

Harness side

Main

Index

Group

TOC

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-110

REAR WIPER AND WASHER

INSPECTION PROCEDURE G-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

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

IGNITION
SWITCH (ACC)

REAR
WIPER RELAY

REAR
WIPER MOTOR

ETACS-ECU

J/B SIDE

REAR WIPER SWITCH

INPUT SIGNAL

Main

Index

Group

TOC

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-111

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

ECU TO BE CHECKED

• COLUMN ECU

• ETACS ECU

OK: "OK" are displayed for all the items

Q: Are the check results 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-37

."

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

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

P.54C-41

."

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 results 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 N-1 "The 
ignition switch (ACC) signal is not received 

P.54C-201

."

Step 3. Connector check: E-04 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.51-38

.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Replace the rear wiper motor.

Item No.

Item name

Normal 
condition

Item 13

REAR WIPER SW

ON

Item 31

IG SW (ACC)

ON

AC401046

Connector: E-04 

AC

Harness side

Main

Index

Group

TOC