Lexus ES300 (1997 year). Manual — part 125
BE05L–03
N21536
29
36
30
N21537
29
36
30
ON
N21538
Wire Harness Side
17 18 19 20 21 22 23 24 25 26 27 28 29
30 31 32 33 34 35 36 37 38 39 40 41 42
N14863
1
2
5
3
3
5
2
1
BE–106
–
BODY ELECTRICAL
DEFOGGER SYSTEM
1490
1997 LEXUS ES300 (RM511U)
INSPECTION
1.
A/C control panel assembly:
INSPECT DEFOGGER SWITCH OPERATION
(a)
Connect the positive (+) lead from the battery to terminal
29 and negative (–) lead to terminal 30.
(b)
Connect the positive (+) lead from the battery to terminal
36 through a 1.4 W test bulb.
(c)
Turn the defogger switch ON and check that the test bulb
and indicator light turn ON, then turn OFF after approx. 15
minutes.
If operation is not as specified, proceed to inspect the A/C con-
trol assembly.
(See page
)
2.
INSPECT DEFOGGER SWITCH CIRCUIT
Disconnect the connector from the switch and inspect the con-
nector on wire harness side.
Tester connection
Condition
Specified condition
30 – Ground
Constant
Continuity
29 – Ground
Ignition switch position ACC or LOCK
No voltage
29 – Ground
Ignition switch position ON
Battery positive voltage
If the circuit is not as specified, inspect the circuits connected
to other parts.
3.
INSPECT DEFOGGER RELAY CONTINUITY
Condition
Tester connection
Specified condition
Constant
1 – 2
Continuity
Apply B+ between
terminals 1 and 2.
3 – 5
Continuity
If continuity is not as specified, replace the relay.
4.
INSPECT DEFOGGER RELAY CIRCUIT
(See page
)
N21211
4
6
N21539
1 2 3
4 5 6
h–6–1
Wire Harness Side
BE4029
Tester Probe
Tin Foil
Heat Wire
–
BODY ELECTRICAL
DEFOGGER SYSTEM
BE–107
1491
1997 LEXUS ES300 (RM511U)
5.
INSPECT MIRROR DEFOGGER OPERATION
(a)
Connect the positive (+) lead from the battery to terminal
6 and the negative (–) lead to terminal 4.
(b)
Check that the mirror becomes warm.
HINT:
It will take a short time for the mirror to become warm.
If the mirror does not become warm, replace the mirror assem-
bly.
6.
INSPECT MIRROR DEFOGGER CIRCUIT
Disconnect the connector from the outside mirror and inspect
the connector on the wire harness side.
Tester connection
Condition
Specified condition
4 – Ground
Constant
Continuity
6 – Ground
Ignition switch position ON
(Defogger switch OFF)
No voltage
6 – Ground
Ignition switch position ON
(Defogger switch ON)
Battery positive voltage
If the circuit is not as specified, inspect the circuits connected
to other parts.
7.
INSPECT DEFOGGER WIRE
NOTICE:
When cleaning the glass, use a soft, dry cloth, and
wipe the glass in the direction of the wire. Take care
not to damage the wires.
Do not use detergents or glass cleaners with abrasive
ingredients.
When measuring voltage, wind a piece of tin foil
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.
BE0123
At Center
BE0124
Several
Volts
0 Volt
Broken
Wire
V
BE0150
Masking Tape
Repair Point
Broken
Wire
BE0151
BE–108
–
BODY ELECTRICAL
DEFOGGER SYSTEM
1492
1997 LEXUS ES300 (RM511U)
(c)
Inspect the voltage at the center of each heat wire.
Voltage
Criteria
Approx. 5V
Okay (No break in wire)
Approx. 10V or 0V
Broken wire
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
positive (+) terminal.
(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.
HINT:
If the heat wire is not broken, the voltmeter indicates 0 V at the
positive (+) end of the heat wire but gradually voltage increases
to approx. 12 V as the meter probe moves to the other end.
8.
IF NECESSARY, REPAIR DEFOGGER WIRE
(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.
(c)
Thoroughly mix the repair agent (Dupont paste No.
4817).
(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.
Z19362
Instrument Panel Junction Block
GAUGE Fuse
DOOR Fuse
POWER Fuse
Power Main Relay
Integration Relay
Ignition Switch
Power Window
Master Switch
Power Window Switch
Power Window Switch
Power Window Motor
Power Window Motor
BE05M–01
–
BODY ELECTRICAL
POWER WINDOW CONTROL SYSTEM
BE–109
1493
1997 LEXUS ES300 (RM511U)
POWER WINDOW CONTROL SYSTEM
LOCATION
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