Mitsubishi 380. Manual - part 60

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-237

STEP 1. Check the input signal by using "DATA LIST" 
menu of the SWS monitor.
Turn the ignition switch to the ACC position before checking 
input signals from the windshield wiper switch.

CAUTION

To prevent damage to Diagnostic Tool MB991958, always 
turn the ignition switch to the "LOCK" (OFF) position 
before connecting or disconnecting Diagnostic Tool 
MB991958. Connect special tool MB991910 before con-
necting special tool MB991812. Be sure to connect special 
tool MB991806 after turning on special tool MB991824.
(1) Connect the special tool. Refer to "How to connect SWS 

monitor 

P.54B-13

."

(2) Operate Diagnostic Tool MB991958 according to the 

procedure below to display "COLUMN ECU."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "SWS MONITOR."
e. Select "Data List."
f.

Select "COLUMN ECU."

(3) Check that normal conditions are displayed for the items 

described in the table below.

Q: Are normal conditions displayed for "INT WIPER SW", 

"LO WIPER SW", "HI WIPER SW" and "MIST WIPER 
SW"?
YES : Go to Step 2.
NO :  Refer to Inspection Procedure M-6 "ETACS-ECU 

does not receive any signal from the windshield mist 
wiper switch 

P.54B-423

."

ITEM NO.

ITEM NAME

NORMAL 
CONDITION

ITEM 05

INT WIPER SW

ON

ITEM 06

LO WIPER SW

ON

ITEM 07

HI WIPER SW

ON

ITEM 08

MIST WIPER SW

ON

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

COLUMN SWITCH 
CONNECTOR

COLUMN SWITCH 
CONNECTOR AT 
HARNESS SIDE 

MB991812

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-238

STEP 2. Check windshield wiper motor connector A-03 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Is windshield wiper motor connector A-03 in good 

condition?
YES : Go to Step 3.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Verify that the windshield wiper operates 

normally when the windshield wiper switch is moved 
to each position.

STEP 3. Check the windshield wiper motor.
(1) Disconnect windshield wiper motor connector A-03.

(2) Connect a battery to the windshield wiper motor as shown. 

Then check the windshield wiper motor operates normally 
at high and low speeds.

Q: Does the windshield wiper motor operate normally?

YES : Go to Step 4.
NO :  Replace the windshield wiper motor. Verify that the 

windshield wiper operates normally when the 
windshield wiper switch is moved to each position.

16DB425A

A-03 (B)

CONNECTOR: A-03

16DB425A

A-03 (B)

CONNECTOR: A-03

16DB426A

HIGH SPEED

LOW SPEED

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-239

STEP 4. Check front-ECU connector A-12X for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.
Q: Is front-ECU connector A-12X in good condition?

YES : Go to Step 5.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Verify that the windshield wiper operates 

normally when the windshield wiper switch is moved 
to each position.

STEP 5. Check the wiring harness between windshield 
wiper motor connector A-03 (terminals 5 and 4) and 
front-ECU connector A-12X (terminals 25 and 24).
Q: Is the wiring harness between windshield wiper motor 

connector A-03 (terminals 5 and 4) and front-ECU 
connector A-12X (terminals 25 and 24) in good 
condition?
YES : No action is necessary and testing is complete.
NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary. Verify that 
the windshield wiper operates normally when the 
windshield wiper switch is moved to each position.

AC305977

CONNCTOR: A-12X

AI

21

22

23

24

25

26

27

28

29

30

31

RELAY BOX SIDE

16DB425A

A-03 (B)

CONNECTOR: A-03

AC305977

CONNCTOR: A-12X

AI

21

22

23

24

25

26

27

28

29

30

31

RELAY BOX SIDE

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-240

INSPECTION PROCEDURE G-4: Windshield Wiper and Washer: Windshield wipers does not stop at 
the predetermined park position.

.

16DB425A

A-03 (B)

CONNECTOR: A-03

AC305977

CONNECTOR: A-12X

AF

16DB353A

CONNECTOR: C-29