Toyota ST185 Series Repair Manual page 97

SYSTEM OUTLINE
WHEN THE IGNITION SW IS TURNED ON, CURRENT FLOWS TO TERMINAL 2 OF THE REAR WASHER MOTOR, TERMINAL 1 OF THE
REAR WIPER MOTOR AND RELAY THROUGH THE WIPER FUSE.
1. REAR WIPER NORMAL OPERATION
WITH THE IGNITION SW TURNED ON AND REAR WIPER AND WASHER SW TURNED ON, THE CURRENT FLOWING TO ERMINAL 1 OF
THE REAR WIPER RELAY FLOWS TO TERMINAL 3 OF THE RELAY
TERMINLA 16 TO GROUND. THUS, THE RELAY COIL IS ACTIVATED AND THE CURRENT TO TERMINAL 1 OF THE REALY FLOWS TO
TERMINAL LB TERMINAL LB OF THE REAR WIPER MOTOR
THE WIPER.
2. REAR WIPER INTERMITTENT OPERATION
WHEN THE IGNITION SW IS ON AND THE REAR WIPER AND WASHER SW IS TURNED TO INT POSITION, CURRENT FLOWING TO
TERMINAL 1 OF THE REAR WIPER MOTOR AND RELAY FLOWS TO TERMINAL 2 OF THE RELAY
WIPER AND WASHER SW
THIS CAUSES THE MOTOR TO OPERATE (THE POINT CHANGES) AND THE INTERMITTENT CIRCUIT OF THE RELAY OPERATES.
INTERMITTENT OPERATION OF THE CIRCUIT IS CONTROLLED BY THE CHARGING AND DISCHARGING OF THE CONDENSER
INSTALLED INSIDE THE RELAY.
3. WASHER OPERATION
WITH THE IGNITION SW TURNED ON AND THE REAR WIPER AND WASHER SW TURNED TO ON POSITION, WHEN THE WIPER SW IS
TURNED FURTHER, THE CURRENT FLOWING TO TERMINAL 2 OF THE REAR WASHER MOTOR FLOWS TO TERMINAL 3 OF THE
MOTOR TERMINAL 2 OF THE REAR WIPER AND WASHER SW
ROTATES AND THE WINDOW WASHER EJECTS THE SPRAY, ONLY WHILE THE SWITCH IS FULLY TURNED.
WHEN THE WIPER SW IS OFF AND THEN TURNED TO WASHER ON (WIPER OFF SIDE), ONLY THE WASHER OPERATES.
SERVICE HINTS
WASHER MOTOR
W 1
2–GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION
3–GROUND : CONTINUITY WITH WASHER SW TURNED ON
REAR WIPER CONTROL RELAY AND MOTOR
R23
1–GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION
2–GROUND : CONTINUITY WITH REAR WIPER SW AT INT POSITION
3–GROUND : CONTINUITY WITH REAR WIPER SW AT ON POSITION
: PARTS LOCATION
CODE SEE PAGE
C14 26
J 6 26
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODE SEE PAGE
1B 18
1F 18
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODE SEE PAGE
IF1 30
BN1 34
BO1 34
: GROUND POINTS
CODE SEE PAGE
ID 30
C14 BLACK
1 2 X
10 X X X 16
TERMINAL 16 GROUND.
CODE
R23
W 1
JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
FLOOR WIRE AND J/B NO. 1 (LEFT KICK PANEL)
JOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
FLOOR WIRE AND COWL WIRE (LEFT KICK PANEL)
BACK DOOR NO. 1 WIRE AND FLOOR WIRE (LEFT SIDE OF PACKAGE TRAY TRIM)
BACK DOOR NO. 1 WIRE AND BACK DOOR NO. 1 SUB WIRE (BACK DOOR UPPER LEFT)
GROUND POINTS LOCATION
LEFT KICK PANEL
J 6
X A
A A
X
( HINT : SEE PAGE 7 )
TERMINAL 1 OF THE REAR WIPER AND WASHER SW
MOTOR TO GROUND AND CAUSES THE MOTOR TO OPERATE
TERMINAL 16
SEE PAGE
27
25
R23
1 2 3
A
A A
TERMINAL 10 OF THE REAR
TO GROUND SO THAT THE WASHER MOTOR
CODE
W 1 GRAY
2 3
SEE PAGE
99