1991 LEXUS SC300 wiper fluid

WIPER AND WASHER SYSTEM
DESCRIPTION
The component parts of this system and their functions are described in the\
following table.
Parts NameFunction
Wiper Switch
This switch changes the current from the wiper motor in order to operate\
the wiper motor
at different speeds.
It also has a built±in variable resistor which is used to adjust the \
interval for intermittent
operation.
Wiper RelayThis relay turns the current to the wiper motor ON and OFF at intervals \
and operates the
wipers continuously when the washer switch is ON.
Wiper MotorSwitching of the current at the wiper switch and wiper relay operates th\
e motor at each speed
(HI, LO) and at intervals (INT), thus moving the wiper arms and blad\
es.
Washer SwitchBy grounding current from the washer motor, this switch operates the washer motor.
Washer MotorA pump in this motor pumps washer fluid and sprays it out from the washe\
r nozzles.
Parts Location
BE±84±
BODY ELECTRICAL SYSTEM Wiper and Washer System
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(Washer Hose and Nozzle)
REMOVAL AND INSTALLATION OF
WASHER HOSE AND NOZZLE
1. REMOVE WASHER HOSE(a) Remove fender liner.
(b) Disconnect washer hose from washer motor.
(c) Remove the hose clamps as shown.HINT: When installing or removing the hose clamp on the un-
derside of the engine hood, remove the clip on the underside
of the silencer.
(d) Remove service hole grommet and disconnect the hose from washer nozzle.
2. INSTALL WASHER HOSE For installation follow the removal procedure in reverse.
HINT: During assembly, the washer hose should be passed
under neath the engine hood hinge on the body side.
3. REMOVE WASHER NOZZLE (a) Remove service hole grommet.
(b) Disconnect washer hose from nozzle.
(c) Press on the claw on the underside of the nozzle and remove it from above.
4. INSTALL WASHER NOZZLE For installation follow the removal procedure in reverse.
ADJUSTMENT OF WASHER NOZZLE
1. INSPECT WASHER NOZZLE
(a) While operating the washer, check whether the upper point where the washer fluid hits the windshield and the
up surge area are within the range indicated by the
hatched line.
(A) Approx. 150 mm (5.91 in.)
(B) Approx. 50 mm (1.99 in.)
(C) Approx. 0±1000 mm (0±3.94 in.)
(b) Check if the lower point where the washer fluid hits thewindshield is within the range of the wiping pattern (the
area of the glass which is wiped by the wiped blades.)
2. ADJUST WASHER NOZZLE Using a tool like that shown in the figure, change the direction
of the nozzle hole to adjust the point where washer fluid
strikes the windshield.
±
BODY ELECTRICAL SYSTEM Wiper and Washer SystemBE±93
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TROUBLESHOOTING
You will find the cause of trouble more easily by properly using the table \
shown below. In this table, the num-
bers indicate the order priority of causes of trouble. Check each part in th\
e order shown. If necessary, re-
place the parts.
See pageB±4,21BE±26BE±4,20BE±91BE±90BE±92BE±91BE±93±
Trouble
Part Name
AM1 FuseIgnition SwitchWIPER FuseWiper SwitchWiper MotorWasher MotorWasher SwitchWasher Hose and NozzleWire Harness
Wipers and washers do not operate.*1132456
Wipers and washers do not operate.*221345
Wipers and washers do not operate.*31234
Wipers do not operate in LO, HI or MIST.123
Wipers do not operate in INT.123
Washer motor does not operate.213
Wipers do not operate when washer switch
is ON.12
Washer fluid does not spray.1
*1: Door Lock and Power Windows do not operate
*
2: Door Lock and Power Window are normal. Combination Meter and Turn Signal do not operate.
*
3: Combination Meter and Turn Signal are normal.
BE±94
±
BODY ELECTRICAL SYSTEM Wiper and Washer System
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GENERAL MAINTENANCE
MA00M±03
There are the maintenance and inspection
items which are considered to be the owner's
responsibility. They can be performed by the
owner or be can have them done at a service
shop. These items include those which should
be checked on a daily basis, those which, in
most cases, do not require (special) tools and
those which are considered to be reasonable
for the owner to perform. Items and procedures
for general maintanance are as follows:
MA00P±04
OUTSIDE VEHICLE
1. TIRES
(a) Check the pressure with a gauge. Adjust ifnecessary.
(b) Check for cuts, damage or excessive wear.
2. WHEEL NUTS Wheel checking the tires, check the nuts for
looseness or for missing nuts. If necessary,
tighten them.
3. TIRE ROTATION It is recommended that tires be rotated every
12,000 km (7,500 miles).
4. WINDSHIELD WIPER BLADES Check for wear or cracks whenever they do not
wipe clean. Replace if necessary.
5. FLUID LEAKS
(a) Check underneath for leaking fuel, oil, water or
other fluid.
(b) If you smell gasoline fumes or notice any leak, have the cause found and corrected.
6. DOORS AND ENGINE HOOD
(a) Check that all doors including the trunk lid operate smoothly, and that all latches lock
securely.
(b) Check that the engine hood secondary latch secures the hood from opening when the
primary latch is released.
MA00R±05
INSIDE VEHICLE
7. LIGHTS
(a) C h e c k t h a t t h e h eadlights, stop lights,
tail±lights, turn signal lights, and other lights
are all working. (b) Check the headlight aiming.
8. WARNING LIGHT AND BUZZERS
Check that all warning lights and buzzers func-
tion properly.
9. HORN Check that it is working.
10. WINDSHIELD GLASS
Check for scratches, pits or abrasions.
11. WINDSHIELD WIPER AND WASHER
(a) Check operation of the wipers and washer.
(b) Check that the wipers do not streak.
12. WINDSHIELD DEFROSTER Check that the air comes out from the defroster
outlet when operating the heater air condition-
er at defroster mode.
13. REAR VIEW MIRROR
Check that it is mounted securely.
14. SUN VISORS Check that they move freely and are mounted
securely.
15. STEERING WHEEL Check that it has the specified freeplay. Be
alert for changes in steering condition, such as
hard steering, excessive freeplay or strange
noise.
16. SEATS
(a) Check that all front seat controls such as seat adjusters, seatback recliner, etc. operate
smoothly.
(b) Check that all latches lock securely in any position.
(c) Check that the locks hold securely in any latched position.
(d) Check that the head restraints move up and
down smoothly and that the locks hold securely
in ay latches position.
(e) For folding±down rear seat backs, check that the latches lock securely.
17. SEAT BELTS
(a) Ch e ck th a t th e se a t be lt syste m su ch as buckles, retractors and anchors operate
properly and smoothly.
(b) Check that the belt webbing is not cut, frayed,
worn or damaged.
18. ACCELERATOR PEDAL Check the pedal for smooth operation and un-
even pedal effort or catching.
±
MAINTENANCE (1UZ ± FE)MA±19
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46
POWER SOURCE (Current Flow Chart)*1: USA
*2: CANADA
60
216
226
192178
226 90 144 134 216 102 202
208
212 90
167
A2 A15 C6 B2
B1
A10 A14 A12 A17A13 A23 A24 A25 A32 C11 B3 B4 B6 C3 C10C7
A21
Blower Resistor Auto Antenna Motor
And Relay A/C Magnetic Clutch
Alternator
A/C Control Assembly
A/C Power Transistor
A/T Indicator Light
(for Shift Lever) A/C Control SW and
Radio SWABS ECU
ABS and Traction ECUBrake Fluid Level SW
Blower Motor
Center Airbag Assembly Check Connector
Cornering Light LH
Cigarette Lighter Back±Up Light SW Buckle SW LHABS and Traction ECUCornering Light RH
190
226 22690
126
226 10168
134
144
178


* These are the page numbers of the first page on which the related system\
is shown.
The part indicated is located somewhere in the system, not necessarily o\
n the page indicated here. *Page Nos. of
Related Systems
Parts
Code or
Location
CB or Fuse
50A DEFOG
30A DOOR
30A POWER
15A STOP
15A ECU±B
10A MIR±HTR
10A HEATER
20A TURN
20A WIPER
10A GAUGE
15A ECU±IG
7.5A ENGINE
7.5A IGN
15A CIG
7.5A RADIO No.2
15A TAIL
7.5A PANEL
7.5A ST
15A TEL
10A DOME
20A RADIO No.1
25A HAZ±HORN
30A EFI
7.5 ALT SENCING
15A HEAD LH*1
15A HEAD RH*1
15A HEAD LH±LWR*2
15A HEAD RH±LWR*2
15A HEAD LH±UPR
15A HEAD RH±UPR
60A HEATER
7.5A TRAC
15A SEAT±HTR
Location
[LOCATION](1): J/B No. 1 (See page 20)(2): R/B No. 2 (See page 19)(3): R/B No. 4 (See page 23)
20
19 22
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47
216182
216
178
216
129 104 144 10260
90
216 62
68
11 2
148
104
111 200 148 148 190
D1
C16 C24
C15 C19 C23 C22
C12
C13
C14C14
C13
C12
Airbag W arning Light
Charge Warning Light
Dimmer SW [Comb. SW]Cruise Control Indicator Light
[Comb. Meter]A/T Indicator Light
[Comb. Meter]
Combination Meter
Rear Lights Warning Light Turn Signal Indicator Light
[Comb. Meter] High Beam Indicator Light
[Comb. Meter]
Check Engine Warning Light
Open Door Warning Light
Traction Indicator Light
ABS Warning Light
[Comb. Meter] Seat Belt Warning LightABS Warning Light and T raction
Off Indicator Light [Comb. Meter]
Coolant Level Warning LightCruise Control ECU Turn Signal SW
[Comb. SW]
Wiper and Washer SW
[Comb. SW]
Choke Coil
Crutch Start SW
Cruise Control Clutch SW
Diode (for Brake Fluid Level)Light Control SW
[Comb. SW] Horn SW [Comb. SW]Combination MeterCornering Light SW
[Comb. SW]
C12 80
82
216
216 216 98
86
216134
216
216 216 184
216
80
90
102 80
90
102
68
94
134
148
216
(4)
: R/B No. 5 (See page ) 22
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