Mitsubishi 380. Manual - part 57

 

  Index      Mitsubishi     Mitsubishi 380 - service repair manual 2005 year

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  55  56  57  58   ..

 

 

Mitsubishi 380. Manual - part 57

 

 

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-225

Washer control

When the ignition switch is in the ACC or ON posi-
tion, and the windshield washer switch is turned ON, 
the front-ECU turns ON the windshield washer relay. 
The windshield wiper drive signal is turned ON after 
0.15 seconds until 2 seconds after the windshield 

washer switch goes OFF to operate the windshield 
wiper continuously. When the windshield washer 
switch is turned ON, if the windshield wiper is operat-
ing intermittently, intermittent operations will be con-
tinued after continuous operations.

NOTE: The wiper drive signal output time varies 
according to the conditions. Refer to the following 
table for details.

AC306460AB

ON

OFF

ON

OFF

ON

OFF

ON

WINDSHIELD WASHER 
SWITCH

WINDSHIELD WASHER 
RELAY

WINDSHIELD WIPER 
AUTO-STOP SIGNAL

WINDSHIELD WIPER 
DRIVE SIGNAL

OFF

WHEN WINDSHIELD WIPER 
SWITCH IS OFF

WHEN WINDSHIELD INTERMITTENT 
WIPER IS OPERATING

T: WIPER OPERATING TIME AFTER WINDSHIELD WASHER SWITCH IS OFF

TI

TI

TI

T

T

t1

t1

t2

t2

t2: WINDSHIELD WASHER OPERATING TIME

t1: 0.15 SECONDS

TI: INTERMITTENT TIME

WHEN WIPER SWITCH IS OFF WHEN WIPER SWITCH IS SET 

TO INT

WHEN WIPER SWITCH IS SET 
TO LO OR HI

t2

0.15 
second or 
less

0.15 - 0.8 
second

0.8 
second or 
more

0.15 
second or 
less

0.15 - 0.8 
second

0.8 
second or 
more

0.15 
second or 
less

0.15 - 0.8 
second

0.8 
second or 
more

T

0 second

1.2 
seconds

2 seconds 0 second

1.2 
seconds

2 seconds 0 second

1.2 
seconds

2 seconds

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-226

INSPECTION PROCEDURE G-1: Windshield Wiper and Washer: The windshield wiper do not work at 
all.

NOTE: This troubleshooting procedure requires use 
of Diagnostic Tool MB991958 and SWS monitor kit 
MB991813. For details on how to use the SWS mon-
itor, refer to "How to connect SWS monitor 

P.54B-13

."

.

CIRCUIT OPERATION

• The windshield wiper and washer switch sends a 

signal through the column-ECU (incorporated in 
the column switch) to the front-ECU. If the col-
umn-ECU sends a windshield wiper and washer 
switch "ON" signal to the front-ECU, the 
front-ECU turns on the relay (incorporated in the 
front-ECU), thus causing the windshield wiper 
and washer motor to be turned on.

• If the SWS communication line is defective, the 

front-ECU operates windshield wiper motor by 
using the other communication lines (wiper 
backup circuit) instead of that line. In this case, 
the windshield wiper works at low speed regard-
less of the windshield wiper and washer switch 
positions ("LO" or "HIGH").

.

TECHNICAL DESCRIPTION (COMMENT)

If the windshield wiper does not work at all, the wind-
shield wiper motor, column switch (windshield wiper 
and washer switch) or the front-ECU may be defec-
tive.

.

TROUBLESHOOTING HINTS

• Refer to circuit diagrams GROUP-

90

• Refer to configuration diagrams GROUP-

80

• Trouble in input signal system

• The wiring harness or connectors may have 

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

• The wiper motor may be defective

• The column switch may be defective

• The front-ECU may be defective

16DB425A

A-03 (B)

CONNECTOR: A-03

AC305977

CONNECTOR: A-12X

AF

16DB353A

CONNECTOR: C-29

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-227

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991958: Diagnostic Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991910: MUT-III Main Harness A

• MB991813: SWS Monitor Kit

• MB991806: SWS Monitor Cartridge

• MB991812: SWS Monitor Harness (For Column-ECU)

• MB991822: Test Probe Harness

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-228

STEP 1. Use Diagnostic Tool MB991958 to select "ECU 
COMM Check" on the SWS monitor display. 
Check the following ECUs:

• Column-ECU

• Front-ECU

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) Turn the ignition switch to the "ON" position.
(3) Operate Diagnostic Tool MB991958 according to the 

procedure below to display "ECU COMM Check."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "SWS MONITOR."
e. Select "ECU COMM Check."

(4) Diagnostic Tool MB991958 should show "OK" on the "ECU 

COMM Check" menus for both the "COLUMN ECU" and 
the "FRONT ECU" menus.

Q: Is "OK" displayed for the "COLUMN ECU" and "FRONT 

ECU" menu?
"OK" is displayed for all the items : 
Go to Step 2.
"NG" is displayed for the "COLUMN ECU" menu : Refer 

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

P.54B-68

."

"NG" is displayed for the "FRONT ECU" menu : Refer to 

Inspection procedure A-4 "Communication with the 
front-ECU is not possible 

P.54B-80

."

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

AC302210

COLUMN SWITCH 
CONNECTOR

COLUMN SWITCH 
CONNECTOR AT 
HARNESS SIDE 

MB991812

AB

 

 

 

 

 

 

 

Content   ..  55  56  57  58   ..