Mitsubishi Galant 9G. Manual — part 65

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-256

Mist wiper control

When the ignition switch is in the ACC or ON posi-
tion, and the windshield mist wiper switch is turned
ON, the front-ECU turns ON the windshield wiper
drive signal. At the same time, the wiper speed
switching relay is turned ON (HIGH-SPEED). While
the windshield mist wiper switch is ON, the wind-
shield wiper will operate at high speed. Then, if the
windshield mist wiper switch is turned off, the wiper
operates at low speed until it stops at the predeter-
mined park position.

When the windshield mist switch is turned on briefly,
the wiper operates once at low speed.
At the point the windshield mist switch is turned ON,
if the windshield wiper has been operating intermit-
tently, the same operations as the above will be per-
formed while the windshield mist wiper switch is ON.
After the windshield mist wiper switch goes OFF, the
intermittent operations will be set again T1 seconds
after the last windshield wiper auto-stop signal turn-
ing ON.

.

Low speed wiper and high speed wiper control

When the ignition switch is at the ACC or ON posi-
tion, and the windshield low speed wiper switch of
the column switch is turned ON, the front-ECU turns
ON the windshield wiper drive signal, turns OFF (LO)
the windshield wiper speed relay, and operates the

windshield wiper at low speed. Next, when the wind-
shield high speed wiper switch is turned ON, the
windshield wiper drive signal is turned ON, the wind-
shield wiper speed switching relay is turned ON (HI),
and the windshield wiper is operated at high speed.

.

AC200047AB

ON

OFF

ON

OFF

ON

OFF

ON (HIGH)

Windshield mist wiper switch

Windshield wiper auto-stop
signal

Windshield wiper drive signal

Windshield wiper speed
switching relay

OFF (LOW)

When windshield
wiper switch is OFF

When windshield intermittent
wiper is operating

T1: Intermittent time

T1

T1

AC005437AF

ON

OFF

ON

OFF

ON

OFF

ON (HIGH)

Windshield low-speed
wiper switch

Windshield high-speed
wiper switch

Windshield wiper auto-stop
signal

ON

OFF

Windshield wiper
drive signal

Windshield wiper
speed switching relay OFF (LOW)

Low speed operations

High speed operations

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-257

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.

AC306460 AB

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

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-258

GENERAL CIRCUIT DIAGRAM FOR THE WINDSHIELD WIPER AND WASHER

IGNITION
SWITCH (ACC)

IGNITION
SWITCH (IG2)

IGNITION
SWITCH (IG1)

RELAY BOX
(FUSE )

FRONT-ECU

WINDSHIELD
WIPER
MOTOR

CIRCUIT
BREAKER

DATA LINK
CONNECTOR

VARIABLE
INTERMITTENT
WIPER
CONTROL
SWITCH

WINDSHIELD
WASHER
SWITCH

WINDSHIELD
WIPER
SWITCH

WINDSHIELD
WASHER
MOTOR

22

ETACS-
ECU

COLUMN-ECU

COLUMN
SWITCH

JUNCTION
BLOCK

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-259

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

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

P.54B-15

."

IGNITION
SWITCH (ACC)

WINDSHIELD
WIPER MOTOR

CIRCUIT
BREAKER

WIPER SPEED
SWITCHING
RELAY

RELAY
BOX

FRONT-ECU

Windshield Wiper Motor Circuit