Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Echo 2000-2002 Approved techinfo.toyota.com ileaf 02toyrm 02toypdf 02rmsour 2002 02echorm be defsy insp
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BE-56
BODY ELECTRICAL - DEFOGGER SYSTEM
BE1FB-01
INSPECTION
1. w/o Defogger timer:
INSPECT DEFOGGER SWITCH CONTINUITY
Switch position Tester connection Specified condition
Switch OFF - No continuity
Switch ON 3-4 Continuity
Illumination circuit 4-5 Continuity
I12375 If continuity is not as specified, replace the switch.
2. w/ Defogger timer:
INSPECT DEFOGGER TIMER OPERATION
4 3
(a) Connect the positive (+) lead from the battery to terminal
2 3 and negative (-) lead to terminal 4.
(b) Connect the positive (+) lead from the battery to terminal
2 through a 3.4 W test bulb.
(c) Turn the defogger switch ON and check that the indicator
light and test bulb light up for 12 for 18 minutes, then the
I12376 indicator light and test bulb lights go out.
If operation is not as specified, replace the switch.
3. w/ Defogger timer:
Wire harness side:
INSPECT DEFOGGER SWITCH CIRCUIT
Disconnect the connector from the switch and inspect the con-
nector on wire harness side, as shown in the chart.
I12372
Tester connection Condition Specified condition
2 - Ground Constant Continuity
4 - Ground Defogger switch OFF No continuity
4 - Ground Defogger switch ON Continuity
3 - Ground Ignition switch LOCK or ACC No voltage
3 - Ground Ignition switch ON Battery positive voltage
If the circuit is not as specified, replace the switch.
4. INSPECT DEFOGGER RELAY CONTINUITY
2 1 Condition Tester connection Specified condition
Constant 1-2 Continuity
3 5
Apply B + between
5 3-5 Continuity
terminal 1 and 2.
1 2
If Continuity is not as specified, replace the relay.
3
I01200
2002 ECHO (RM884U)
Author : Date : 1259
BE-57
BODY ELECTRICAL - DEFOGGER SYSTEM
5. INSPECT DEFOGGER WIRE
NOTICE:
S When cleaning the glass, use a soft, dry cloth, and
Tester Probe
wipe the glass in the direction of the wire. Take care
Heat WIre not to damage the wires.
S Do not use detergents or glass cleaners with abrasive
Tin Foil
ingredients.
S When measuring voltage, wind a piece of tin foil
I01291 around the top of the negative probe and press the foil
against the wire with your finger, as shown.
At Center (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 Criteria
Approx. 5V Okay (No break in wire)
Approx. 10V or 0V Broken wire
HINT:
I01292
If there is approximately 10 V, the wire is broken between the
center of the wire and the positive (+) end. If there is no voltage,
Several the wire is broken between the center of the wire and ground.
0 Volts
Volts (d) Place the voltmeter positive (+) lead against the defogger
positive (+) terminal.
Broken
Wire (e) Place the voltmeter negative (-) lead with the foil strip
against the heat wire at the positive (+) terminal end and
slide it toward the negative (-) terminal end.
(f) The point where the voltmeter deflects from zero to sever-
al V is the place where the heat wire is broken.
I01293
HINT:
If the heat wire is not broken, the voltmeter indicates 0 V at the
positive (+) end of the heat wire but gradually increases to about
12 V as the meter probe is moved to the other end.
6. IF NECESSARY, REPAIR DEFOGGER WIRE
Repair Point (a) Clean the broken wire tips with grease, wax and silicone
remover.
(b) Place the masking tape along both sides of the wire for
repair.
Broken
(c) Thoroughly mix the repair agent (Dupont paste No.
Wire
4817).
Marking Tape
I01294
2002 ECHO (RM884U)
Author : Date : 1260
BE-58
BODY ELECTRICAL - DEFOGGER SYSTEM
(d) Using a fine tip brush, apply a small amount of the agent
to the wire.
(e) After a few minutes, remove the masking tape.
(f) Do not repair the defogger wire for at least 24 hours.
I01295
2002 ECHO (RM884U)
Author : Date : 1261
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