Toyota Tundra 2005 Service - Repair - Maintenance page 3013

BE-104
1
2
5
3
Tester Probe
Foil Strip
Ground Side
BODY ELECTRICAL
3 5
2
1
N14863
Heat Wire
Tin Foil
I01291
At Center
I01292
Several
0 Volts
Volts
Broken
Wire
Battery
Side
I01293
- DEFOGGER SYSTEM (Double Cab)
3. INSPECT MIRROR HEATER RELAY (Marking: MIR
HTR) CONTINUITY
Condition
3 - 5
3 - 5
If the continuity is not as specified, replace the relay.
4. INSPECT DEFOGGER WIRE
NOTICE:
D
When cleaning the glass, use a soft and dry cloth and
wipe the glass in the direction of the wire. Take care
not to damage the wires.
D
Do not use detergents or glass cleaners with abrasive
ingredients.
D
When measuring voltage, wrap a piece of tin foil
around the tip of the negative probe and press the foil
against the wire with your finger, as shown in the il-
lustration.
(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 in the illustration.
Voltage
Approx. 5 V
Approx. 10 V or 0 V
HINT:
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,
the wire is broken between the center of the wire and ground.
(d) Place the voltmeter positive (+) lead against the defogger
wire on the battery side.
(e) Place the voltmeter negative (-) lead with the foil strip
against the wire on the ground side.
(f) Slide the positive (+) lead from the battery to the ground
side.
(g) The point where the voltmeter deflects from several V to
zero V is the place where the defogger wire is broken.
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 moves to the other end.
Author :
Specified Condition
No continuity
Continuity
(When battery voltage is applied to terminals 1 and 2)
Okay (No break in wire)
Broken wire
Date :
Criteria
4661