Toyota Celica 2005 Repair Manual page 2234

Tester connection
5 − Ground
5 − Ground
1 2
3
5
1
3
Tester Probe
2005 CELICA (RM1131U)
BODY ELECTRICAL
Ignition switch ON and defogger switch OFF
Ignition switch ON and defogger switch ON
5
2
I01200
Heat Wire
Tin Foil
I01291
At Center
I01292
− DEFOGGER SYSTEM
3. Connector connected:
INSPECT DEFOGGER SWITCH CIRCUIT
Connect the connector from the switch and inspect the wire har-
ness side connector from the back side as shown in the chart.
Condition
If the circuit is not as specified, try replace the switch with a new
one.
If the circuit is not as specified, inspect the circuit connected to
other parts.
4. INSPECT DEFOGGER RELAY CONTINUITY
Condition
Constant
Apply B+ between
terminals 1 and 2.
If continuity is not as specified, replace the relay.
5. INSPECT DEFOGGER WIRE
NOTICE:
When cleaning the glass, use a soft, dry cloth, and
S
wipe the glass between the wires. Take care not to
damage the wires.
Do not use detergents or glass cleaners with abrasive
S
ingredients.
When measuring voltage, wind a piece of tin foil
S
around the top of the negative probe and press the foil
against the wire with your finger, as shown.
(a) Turn the ignition switch ON.
(b) Turn the defogger switch ON.
(c) Inspect the voltage at the center of each heat wire, as
shown.
Voltage
Approx. 5V
Approx. 10V or 0V
2233
Specified condition
Battery positive voltage
No voltage
Tester connection Specified condition
1 − 2
3 − 5
Criteria
Okay (No break in wire)
Broken wire
BE−59
Continuity
Continuity