Toyota 2004 CELICA Electric Troubleshooting Manual page 194

SYSTEM OUTLINE
When the ignition SW is turned on, current flows to TERMINAL 2 of the washer motor, TERMINAL 1 of the rear wiper motor
and relay through the RR WIP fuse.
1. REAR WIPER NORMAL OPERATION
With the ignition SW turned on and rear wiper and washer SW turned on, current to TERMINAL 1 of the rear wiper motor and
relay flows to TERMINAL 3 of the rear wiper motor and relay to TERMINAL 10 of the rear wiper and washer SW to
TERMINAL 2 to GROUND. Thus, the relay coil is activated and current to the rear wiper motor to motor to GROUND,
causing the motor to operate the wiper.
2. REAR WIPER INTERMITTENT OPERATION
When the ignition SW is turned on and the rear wiper and washer SW is turned to INT position, current to TERMINAL 1 of
the rear wiper motor and relay flows to TERMINAL 2 of the rear wiper motor and relay to TERMINAL 13 of the rear wiper and
washer SW to TERMINAL 2 to GROUND.
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, current to TERMINAL 2 of the washer motor flows to TERMINAL 3 of the motor to TERMINAL 12 of the rear wiper
and washer SW to TERMINAL 2 to GROUND so that the washer motor rotates and the window washer emits a water, only
while the switch is fully turned.
When the wiper SW is off and then turned washer on (Wiper off side), the wiper SW is on and then turned to washer on
(Wiper on side), only the washer operates.
SERVICE HINTS
W1 WASHER MOTOR
2-GROUND : Approx. 12 volts with the ignition SW at ON position
3-GROUND : Continuity with the washer SW turned on
R12 REAR WIPER MOTOR AND RELAY
1-GROUND : Approx. 12 volts with the ignition SW at ON position
2-GROUND : Continuity with the rear wiper and washer SW at INT position
3-GROUND : Continuity with the rear wiper and washer SW at ON position
: PARTS LOCATION
Code See Page
C14 36
J3 37
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
Code See Page
IE 25
IO 25
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page
IF1 46
IG4 46
BA2 48
BB2 48
: GROUND POINTS
Code See Page
IE 44
Code
R12
W1
Junction Block and Wire Harness (Connector Location)
Instrument Panel Wire and Instrument Panel J/B (Instrument Panel Brace RH)
Floor Wire and Instrument Panel J/B (Instrument Panel Brace RH)
Joining Wire Harness and Wire Harness (Connector Location)
Floor Wire and Instrument Panel Wire (Instrument Panel Brace LH)
Engine Room No.2 Wire and Instrument Panel Wire (Right Kick Panel)
Back Door No.1 Wire and Floor Wire (Quarter Panel LH)
Back Door No.2 Wire and Back Door No.1 Wire (Back Door Upper Left)
Ground Points Location
Cowl Side Panel LH
2004 CELICA (EWD538U)
See Page
39
33 (1ZZ-FE)
Code See Page
W1 35 (2ZZ-GE)
195