FUNCTIONS AND CONTROL OF SWS ECUS
SIMPLIFIED WIRING SYSTEM (SWS)
54B-12
Low speed wiper and 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 relay, and operates the wind-
shield wiper at low speed. Next, when the windshield
high speed wiper switch is turned ON, the windshield
wiper drive signal is turned ON, the windshield 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 seconds until three sec-
onds 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-
tion.
NOTE: The wiper drive signal output time varies
according to the conditions. Refer to the following
table for details.
AC005437
AB
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
AC200069
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
TI: INTERMITTENT TIME
TI TI
TI
TT
tt
WHEN WIPER SWITCH IS OFF WHEN WIPER SWITCH IS INT WHEN WIPER
SWITCH IS SET
TO LO OR HI
t0.3
seconds
or less
0.3 - 0.5
seconds
0.5 - 0.7
seconds
0.7
seconds
Less
than 0.2
seconds
0.3 - 0.5
seconds
0.5 - 0.7
seconds
0.7
seconds
−
T 0 second 1 second 2
seconds
3
seconds
0 second 1 second 2
seconds
3
seconds
3 seconds
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