1995 TOYOTA SUPRA Service Repair Manual

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Page 665 of 2543

TOYOTA SUPRA 1995 Service Repair Manual DEFOGGER SYSTEM
PARTS LOCATION
± BODY ELECTRICAL SYSTEMDEFOGGER SYSTEMBE±63

Page 666 of 2543

TOYOTA SUPRA 1995 Service Repair Manual TROUBLESHOOTING
The table below will be useful for you in troubleshooting these electrical problems. The most likely causes
of the malfunction are shown in the order of their probability. Inspect each

TROUBLESHOOTING
The table below will be useful for you in troubleshooting these electrical problems. The most likely causes
of the malfunction are shown in the order of their probability. Inspect each part in the order shown, and
replace the part when it is found to be faulty.
Trouble Parts name (See page)

All defogger systems do not operate

1. GAUGE Fuse (BE±6)
2. DEFOG Fuse (BE±6)
3. Defogger Relay (BE±65)
4. Defogger Switch (BE±64)
5. A/C Amplifier (AC Section)
6. Wire Harness

Rear window defogger does not operate

1. Defogger Wires (BE±65)
2. Wire Harness

Mirror defogger does not operate

1. MIR±HTR Fuse (BE±6)
2. Mirror Defogger (BE±66)
3. Wire Harness
DEFOGGER SWITCH INSPECTION
INSPECT SWITCH OPERATION
(a) Connect the positive (+) lead from the voltmeter to terminal
7 of connector B and the negative (±) lead from voltmeter to
terminal 10 of connector B.
(b) When the switch is off, the voltage should be approx. 12 V.
(c) When the switch is on, check that the indicator light lights up
and that the voltage is less than 1 V.
(d) After 15 minutes, check that the switch is off and the voltage
is approx. 12 V.
A/C AMPLIFIER INSPECTION
See A/C section BE±64
± BODY ELECTRICAL SYSTEMDEFOGGER SYSTEM

Page 667 of 2543

TOYOTA SUPRA 1995 Service Repair Manual DEFOGGER RELAY INSPECTION
INSPECT RELAY CONTINUITY

Condition

Tester connection to
terminal number
Specified condition

DEFOGGER RELAY INSPECTION
INSPECT RELAY CONTINUITY

Condition

Tester connection to
terminal number
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.
DEFOGGER WIRE INSPECTION
NOTICE:
wWhen 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.
wDo not use detergents or glass cleaners with
abrasive ingredients.
w 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.
(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: If there is approximately 10 V, the wire is broken be-
tween 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 several
V is the place where the heat wire is broken.
HINT: If the heat wire is not broken, the voltmeter indicates
O V at the positive (+) end of the heat wire but gradually in-
creases to about 12 V as the meter probe is moved to the oth-
er end.
± BODY ELECTRICAL SYSTEMDEFOGGER SYSTEMBE±65

Page 668 of 2543

TOYOTA SUPRA 1995 Service Repair Manual DEFOGGER WIRE REPAIR
(a) Clean the broken wire tips with a grease, wax and silicone
remover.
(b) Place the masking tape along both sides of the wire to be
repaired.
(c) Thoroughly mix the repair ag

Page 669 of 2543

TOYOTA SUPRA 1995 Service Repair Manual POWER WINDOW CONTROL
SYSTEM
PARTS LOCATION
± BODY ELECTRICAL SYSTEMPOWER WINDOW CONTROL SYSTEMBE±67

Page 670 of 2543

TROUBLESHOOTING
The table below will be useful for you in troubleshooting these electrical problems. The most likely causes
of the malfunction are shown in the order of their probability. Inspect each part in the order shown, and
replace the part when it is found to be faulty.
Trouble Parts name (See page)

*1 Power window does not operate.

1. ALT Fuse (BE±5)
2. POWER Fuse (BE±5)
3. AM 1 Fuse (BE±5)
4. DOOR Fuse (BE±6)
5. Ignition Switch (BE±8)
6. Power Window Master Switch (BE±69)
7. Wire Harness

*2 Power Window does not operate.

1. GAUGE Fuse (BE±6)
2. Power Main Relay (BE±73)
3. Ignition Switch (BE±8)
4. Power Window Master Switch (BE±69)
5. Wire Harness
ºOne Touch Power Window Systemº does not operate. 1. Power Window Master Switch (BE±69)

Only one window glass does not move.

1. Power Window Master Switch (BE±69)
2. Power Window Switch (BE±71)
3. Power Window Motor (BE±71)
4. Wire Harness
ºWindow Lock Systemº does not operate. 1. Power Window Master Switch (BE±69)
Illumination does not light up.

1. Power Window Master Switch (BE±69)
*1 Power door lock does not operate.
*
2 Power door lock is normal. BE±68
± BODY ELECTRICAL SYSTEMPOWER WINDOW CONTROL SYSTEM

Page 671 of 2543

TOYOTA SUPRA 1995 Service Repair Manual POWER WINDOW MASTER SWITCH
INSPECTION
1. INSPECT SWITCH CONTINUITY
Driver s Switch

Switch position

Tester connection to
terminal number

Page 672 of 2543

TOYOTA SUPRA 1995 Service Repair Manual 3. INSPECT ONE TOUCH POWER WINDOW SYSTEM
Using an ammeter.
(a) Disconnect the connector from the master switch.
(b) Connect the positive (+) lead from the ammeter to terminal 9
on the wire harness

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