Mitsubishi Colt Ralliart. Manual - part 397

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-96

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.

• Turn the ignition switch to the ON position.

ECU TO BE CHECKED

• COLUMN ECU

• ETACS-ECU

OK: "OK" are displayed for all the items

Q: Are the check results normal?

"OK" is 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. Retest the system.
The windshield wiper should now work normally.

Q: Is the check result normal?

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.

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SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-97

INSPECTION PROCEDURE F-3: The windshield wipers do not stop at the specified park position.

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

The windshield wiper motor or the ETACS-ECU may 
be defective.

POSSIBLE CAUSES

• Malfunction of the windshield wiper motor

• 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

IGNITION
SWITCH (ACC)

ETACS-ECU

J/B SIDE

WINDSHIELD 
WIPER MOTOR

WIPER 
AUTOMATIC 
STOP RELAY

Windshield Wiper Automatic Stop Relay Circuit

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SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-98

DIAGNOSIS PROCEDURE

Step 1. Connector check: A-04 windshield wiper 
motor connector.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the connector.

Step 2. Check the windshield wiper motor 
assembly.
Refer to GROUP 51 

− Windshield wiper 

P.51-31

.

Q: Is the check result normal?

YES : 

Go to Step 3

NO : 

Replace the windshield wiper motor 
assembly.

Step 3. Voltage measurement at the A-04 
windshield wiper motor connector.

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Ignition switch: ACC

(3) Check the voltage between the A-04 windshield 

wiper motor connector terminal No.2 and body 
earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Go to Step 4.

AC313860

Connector: A-04

Harness side

AB

A-04 (GR)

AC313860

Connector: A-04

Harness side

AB

A-04 (GR)

AC313972

Connector A-04
(Harness side)

AM

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SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-99

Step 4. Check the wiring harness between A-04 
windshield wiper motor connector terminal No.2 
to ignition switch (ACC).

NOTE: 

Prior to the wiring harness inspection, check the 
junction connectors B-112, B-129, and repair if nec-
essary.

• Check the power supply line to 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 

use Troubleshooting/inspection Service 
Points 

− How to Cope with Intermittent 

Malfunction 

P.00-13

).

NO : 

Repair the wiring harness.

Step 5. Connector check: B-134 ETACS-ECU 
connector.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the connector.

Step 6. Check the wiring harness between A-04 
windshield wiper motor connector terminal No.3 
to B-134 ETACS-ECU connector terminal No.6.

• Check the input signal lines.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the wiring harness.

AC313860

Connector: A-04

Harness side

AB

A-04 (GR)

AC313870

Connector: B-112

BE

Junction block (Front view)

Harness side

AC313872BC

Connector: B-129

Harness side

Junction block (Rear view)

AC313872 AH

Connector: B-134

Harness side

Junction block (Rear view)

AC313860

Connector: A-04

Harness side

AB

A-04 (GR)

AC313872 AH

Connector: B-134

Harness side

Junction block (Rear view)

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