TOYOTA SUPRA 1997 Service Repair Manual
Page 211 of 1807
Z18235
Outer Rear View Mirror LH
Mirror DefoggerA/C Control Panel Assembly
Defogger Switch
Outer Rear View Mirror RH
Mirror Defogger
Rear Window Defogger Defogger Relay R/B No.4
MIR-HTR Fuse DEFOG Fuse GAUGE Fuse J/B No.1
BE0EC-01
- BODY ELECTRICALDEFOGGER SYSTEM
BE-55
2033 Author: Date:
1997 SUPRA (RM502U)
DEFOGGER SYSTEM
LOCATION
Page 212 of 1807
BE0ED-01
N08876
Connector B Connector A
10
7
N08877ON
Z05932
BE4029
Tester Probe
Heat Wire
TIn Foil BE-56
- BODY ELECTRICALDEFOGGER SYSTEM
2034 Author: Date:
1997 SUPRA (RM502U)
INSPECTION
1. INSPECT DEFOGGER SWITCH OPERATION
(a) Connect the positive (+) lead from the voltmeter to termi-
nal 7 of connector B and the negative (-) lead from volt-
meter 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 volt-
age is approx. 12 V.
2. INSPECT A/C AMPLIFIER
See page DI-71 1
3. INSPECT DEFOGGER RELAY CONTINUITY
ConditionTester connectionSpecified condition
Constant1 - 2Continuity
Apply B+ between
terminals 1 and 2.3 - 5Continuity
If continuity is not as specified, replace the relay.
4. 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.
Page 213 of 1807
BE0123
At Center
BE0124
0 VoltSeveral
Volts
Broken
Wire
BE0150
Repair Point
Masking TapeBroken
Wire
- BODY ELECTRICALDEFOGGER SYSTEM
BE-57
2035 Author: Date:
1997 SUPRA (RM502U)
(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.
VoltageCriteria
Approx. 5VOkay (No break in wire)
Approx. 10V or 0VBroken 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 increases to about
12 V as the meter probe is moved to the other end.
5. IF NECESSARY, REPAIR DEFOGGER WIRE
(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 agent (DuPont paste No.
4817).
Page 214 of 1807
BE0151
N08878
Z13354
Wire Harness Side BE-58
- BODY ELECTRICALDEFOGGER SYSTEM
2036 Author: Date:
1997 SUPRA (RM502U)
(d) Using a fine tip brush, apply a small amount to the wire.
(e) After a few minutes, remove the masking tape.
(f) Do not repair the defogger wire for at least 24 hours.
6. INSPECT MIRROR DEFOGGER OPERATION
(a) Connect the positive (+) lead from the battery to terminal
2 and the negative (-) lead to terminal 1.
(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.
7. INSPECT MIRROR DEFOGGER CIRCUIT
Disconnect the connector from the outside mirror and inspect
the connector on the wire harness side, as shown.
Tester connectionConditionSpecified condition
1 - GroundConstantContinuity
2 - GroundIgnition switch ON (Defogger switch OFF)No voltage
2 - GroundIgnition switch ON (Defogger switch ON)Battery positive voltage
If the circuit is not as specified, inspect the circuits connected
to other parts.
Page 215 of 1807
Z18236
Power Window Switch
Power Window Motor POWER Fuse
Power Main Relay
Power Window Master Switch GAUGE Fuse DOOR FuseR/B No.2
J/B No.1
Power Window Motor
BE0EE-01
- BODY ELECTRICALPOWER WINDOW CONTROL SYSTEM
BE-59
2037 Author: Date:
1997 SUPRA (RM502U)
POWER WINDOW CONTROL SYSTEM
LOCATION
Page 216 of 1807
Z09149
BE0EF-01
N08854
BE-60
- BODY ELECTRICALPOWER WINDOW CONTROL SYSTEM
2038 Author: Date:
1997 SUPRA (RM502U)
INSPECTION
1. INSPECT POWER WINDOW MASTER SWITCH CON-
TINUITY
Driver 's Switch:
Switch positionTester connectionSpecified condition
UP4 - 10, 8 - 9Continuity
OFF8 - 10, 8 - 9Continuity
DOWN4 - 9, 8 - 10Continuity
Passenger 's Switch (Window unlock):
Switch positionTester connectionSpecified condition
UP4 - 5, 7 - 8Continuity
OFF5 - 8, 7 - 8Continuity
DOWN4 - 7, 5 - 8Continuity
Passenger 's Switch (Window lock):
Switch positionTester connectionSpecified condition
UP4 - 5Continuity
OFF5 - 7Continuity
DOWN4 - 7Continuity
If continuity is not as specified, replace the switch.
2. INSPECT POWER WINDOW MASTER SWITCH ILLU-
MINATION
Connect the positive (+) lead from the battery to terminal 4 and
the negative (-) lead to terminal 8, check that the illumination
lights up.
If operation is not as specified, replace the master switch.
Page 217 of 1807
Z09151
Z09152
Z09163
Z09164
- BODY ELECTRICALPOWER WINDOW CONTROL SYSTEM
BE-61
2039 Author: Date:
1997 SUPRA (RM502U)
3. Using an ammeter:
INSPECT ONE TOUCH POWER WINDOW SYSTEM/
CURRENT OF CIRCUIT
(a) Disconnect the connector from the master switch.
(b) Connect the positive (+) lead from the ammeter to termi-
nal 9 on the wire harness side connector and the negative
(-) lead to negative terminal of the battery.
(c) Connect the positive (+) lead from the battery to terminal
10 on the wire harness side connector.
(d) As the window goes down, check that the current flow is
approximately 7 A.
(e) Check that the current increases up to approximately
14.5 A or more when the window stops going down.
HINT:
The circuit breaker opens some 4 - 90 seconds after the win-
dow stops going down, so that check must be made before the
circuit breaker operates.
If the operation is as specified, replace the master switch.
4. Using an ammeter with a current-measuring probe:
INSPECT ONE TOUCH POWER WINDOW SYSTEM
CURRENT OF CIRCUIT
(a) Remove the master switch with connector connected.
(b) Attach a current-measuring probe to terminal 4 of the
wire harness.
(c) Turn the ignition switch ON and set the power window
switch in the down position.
(d) As the window goes down, check that the current flow is
approximately 7 A.
(e) Check that the current increases up to approximately
14.5 A or more when the window stops going down.
HINT:
The circuit breaker opens some 9 - 90 seconds after the win-
dow stops going down, so that check must be made before the
circuit breaker operates.
If operation is as specified, replace the master switch.
Page 218 of 1807
Z10792
N09810
N09811
N09812
N09813
BE-62
- BODY ELECTRICALPOWER WINDOW CONTROL SYSTEM
2040 Author: Date:
1997 SUPRA (RM502U)
5. INSPECT POWER WINDOW SWITCH CONTINUITY
Switch positionTester connectionSpecified condition
UP1 - 4, 3 - 5Continuity
OFF1 - 2, 3 - 5Continuity
DOWN1 - 2, 3 - 4Continuity
If continuity is not as specified, replace the switch.
6. Driver 's Door:
INSPECT POWER WINDOW MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
1 and the negative (-) lead to terminal 2, and check that
the motor turns clockwise.
(b) Reverse the polarity, and check that the motor turns coun-
terclockwise.
If operation is not as specified, replace the motor.
7. Passenger 's Door:
INSPECT POWER WINDOW MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
1 and the negative (-) lead to terminal 2, and check that
the motor turns clockwise.
(b) Reverse the polarity, and check that the motor turns coun-
terclockwise.
If operation is not as specified, replace the motor.
Page 219 of 1807
Z09157
Z09158
Z09159
Z09160
Z05930
3
21
53
5 21
- BODY ELECTRICALPOWER WINDOW CONTROL SYSTEM
BE-63
2041 Author: Date:
1997 SUPRA (RM502U)
8. Driver 's Door:
INSPECT PTC OPERATION
(a) Disconnect the connector from the master switch.
(b) Connect the positive (+) lead from the battery to terminal
9 and the negative (-) lead to terminal 10 on the wire har-
ness side connector and raise the window to the fully
closed position.
(c) Continue to apply voltage, and check that there is a PTC
operation noise within approximately 4 to 90 seconds.
(d) Reverse the polarity, and check that the window begins
to descend within approximately 60 seconds.
If operation is not as specified, replace the motor.
9. Passenger 's Door:
INSPECT PTC OPERATION
(a) Disconnect the connector from the power window switch.
(b) Connect the positive (+) lead from the battery to terminal
2 and the negative (-) lead to terminal 5 on the wire har-
ness side connector, and raise the window to the fully
closed position.
(c) Continue to apply voltage, and check that there is a PTC
operation noise within approximately 4 to 90 seconds.
(d) Reverse the polarity, and check that the window begins
to descend within approximately 60 seconds.
If operation is not as specified, replace the motor.
10. INSPECT POWER MAIN RELAY CONTINUITY
ConditionTester connectionSpecified condition
Constant1 - 2Continuity
Apply B+ between
terminals 1 and 2.3 - 5Continuity
If continuity is not as specified, replace the relay.
Page 220 of 1807
Z18237
POWER Fuse
Sliding Motor
Reclining Motor
Power Seat Switch DOOR Fuse R/B No.2
J/B No.1
BE0EG-01
BE-64
- BODY ELECTRICALPOWER SEAT CONTROL SYSTEM
2042 Author: Date:
1997 SUPRA (RM502U)
POWER SEAT CONTROL SYSTEM
LOCATION