1997 TOYOTA SUPRA window

V07469
HEAT METHOD: When the problem seems to occur when the suspect area is heated. 2
NOTICE:
(1) Do not heat to more than 60 °C (140 °F). (Temperature
is limited not to damage the components.)
(2) Do not apply heat directly to parts in the ECU.
3 WATER SPRINKLING METHOD:
NOTICE:
(1) Never sprinkle water directly into the engine
compartment, but indirectly change the temperature and
humidity by applying water spray onto the radiator front
surface.
(2) Never apply water directly onto the electronic
components.
4 OTHER: When a malfunction seems to occur when electrical load is excessive.When the malfunction seems to occur on a rainy day or in a
high-humidity condition. Heat the component that is the likely cause of the malfunction
with a hair dryer or similar object. Check to see if the malfunction
occurs.
Sprinkle water onto the vehicle and check to see if the malfunc-
tion occurs.
Turn on all electrical loads including the heater blower, head
lights, rear window defogger, etc. and check to see if the mal-
function occurs.ON (Service hint)
If a vehicle is subject to water leakage, the leaked water may
contaminate the ECU. When testing a vehicle with a water leak-
age problem, special caution must be taken.
Malfunc-
tion
- INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMSIN-23
23 Author
: Date
:
1997 SUPRA (RM502U)

- BODY ELECTRICALBODY ELECTRICAL SYSTEM
BE-9
1987 Author
: Date
:
1997 SUPRA (RM502U)
DEFOGGER SYSTEM
SymptomSuspect AreaSee page
All defogger systems do not operate.
1. GAUGE Fuse (J/B No.1)
2. DEFOG Fuse (J/B No.1)
3. Defogger Relay (R/B No.4)
4. Defogger Switch
5. A/C Amplifier
6 Wire Harness
BE-56
BE-56
DI-71 1
Rear window defogger does not operate.1. Defogger Wires
2. Wire HarnessBE-56
Mirror defogger does not operate.
1. MIR-HTR Fuse (J/B No.1)
2. Mirror Defogger
3. Wire Harness
BE-56
POWER WINDOW CONTROL SYSTEM
SymptomSuspect AreaSee page
Power window does not operate.
(Power door lock does not operate.)
1. POWER Fuse (R/B No.2)
2. DOOR Fuse (J/B No.1)
3. Ignition Switch
4. Power Window Master Switch
5. Wire Harness
BE-13
BE-60
Power Window does not operate.
(Power door lock is normal.)
1. GAUGE Fuse (J/B No.1)
2. Power Main Relay (J/B No.1)
3. Ignition Switch
4. Power Window Master Switch
5. Wire Harness
BE-60
BE-13
BE-60
ºOne Touch Power Window Systemº does not operate.1. Power Window Master SwitchBE-60
Only one window glass does not move.
1. Power Window Master Switch
2. Power Window Switch
3. Power Window Motor
4. Wire HarnessBE-60
BE-60
BE-60
ºWindow Lock Systemº does not operate.1. Power Window Master SwitchBE-60
Illumination does not light up.1. Power Window Master SwitchBE-60
POWER SEAT CONTROL SYSTEM
SymptomSuspect AreaSee page
Power seat does not operate.
1. POWER Fuse (R/B No.2)
2. DOOR Fuse (J/B No.1)
3. Power Seat Switch
4. Wire Harness
BE-65
ºSlide operationº does not operate.
1. Power Seat Switch
2. Sliding Motor
3. Wire HarnessBE-65
BE-65
ºReclining operationº does not operate.
1. Power Seat Switch
2. Reclining Motor
3. Wire HarnessBE-65
BE-65

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

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

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.

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.

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.

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.