Mitsubishi Montero (2002-2004). Manual — part 295

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-227

WINDSHIELD WIPER AND WASHER

GENERAL DESCRIPTION CONCERNING THE WINDSHIELD WIPER AND WASHER

M1549021500075

The following ECUs affect the functions and control
of the windshield wiper and washer.

Windshield wiper and washer control function

.

Intermittent control
The ETACS-ECU calculates the intermittent time from the
windshield wiper intermittent time adjusting knob at the column
switch and sends it to the front-ECU as SWS data.
The front-ECU determines the intermittent time T1 from the
input SWS data signal, and turns ON the windshield wiper drive
signal. When the wiper is at the STOP position, the windshield
wiper auto-stop signal goes OFF to turn OFF the windshield
wipe drive signal. After the intermittent time T1 seconds from
when the windshield wiper drive signal turned ON, the wind-
shield wiper drive signal is turned ON again and the above
operation is repeated.

.

Mist wiper control
When the ignition switch is at the ACC or ON posi-
tion, if the windshield mist wiper switch of the column
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 windshield 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
predetermined park position.

When the windshield mist switch is turned on briefly,
the wiper operates at low speed once.
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 windshield wiper auto-stop signal is turned
ON last.

FUNCTION

CONTROL ECU

Intermittent control

ETACS-ECU, front-ECU, column switch

Mist wiper control

front-ECU, column switch

Low speed wiper, high speed wiper control

front-ECU, column switch

Washer control

front-ECU, column switch

AC200355AC

ON

OFF

ON

OFF

WINDSHIELD
WIPER
AUTOSTOP
SIGNAL

WINDSHIELD
WIPER DRIVE
SIGNAL

T1

T1

T1: Intermittent time

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-228

.

Low speed wiper, high speed wiper control
When the ignition switch is at the ACC or ON posi-
tion, if 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 switching relay, and operates

the windshield wiper at low speed. Next, when the
windshield 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.

.

Washer control
When the ignition switch is at the ACC or ON posi-
tion, if the windshield washer switch of the column
switch is turned ON, the front-ECU turns ON the
windshield washer relay. The windshield wiper drive
signal is turned ON in 0.3 second until 3 seconds
after the windshield washer switch goes OFF to

operate the windshield wiper continuously. When the
windshield washer switch is turned ON, if the wind-
shield wiper is operating intermittently, intermittent
operations will be continued after continuous opera-
tions.
NOTE: The wiper drive signal output time varies
according to the conditions. Refer to the following
table for details.

AC203080AB

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

AC203089AB

ON

OFF

ON

OFF

ON

OFF

(HI) ON

WINDSHIELD LOW SPEED
WIPER SWITCH

WINDSHIELD HIGH SPEED
WIPER SWITCH

WINDSHIELD WIPER
AUTO-STOP SIGNAL

ON

OFF

WINDSHIELD WIPER
DRIVE SIGNA

WINDSHIELD WIPER SPEED
SWITCHING RELAY

(LO) OFF

LOW SPEED OPERATIONS

HIGH SPEED OPERATIONS

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-229

AC200083AC

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

T1: Intermittent time

T1

T1

T1

T

T

t

t

WHEN WIPER SWITCH IS OFF

WHEN WIPER SWITCH IS INT

WHEN WIPER
SWITCH IS LO
OR HI

t

0.3
second
or less

0.3 - 0.5
second

0.5 - 0.7
second

0.7
second

Less
than 0.2
second

0.3 - 0.5
second

0.5 - 0.7
second

0.7
second

−

T

0 second 1 second 2

seconds

3
seconds

0 second 1 second 2

seconds

3
seconds

3 seconds

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-230

General circuit diagram for the windshield wiper and washer