TOYOTA SUPRA 1997 Service Repair Manual

BE0EH-01
N09885
Connector ºBº
Connector ºAº
Slide Foward
Back Back FowardReclining
N09800
N19849
N19850
- BODY ELECTRICALPOWER SEAT CONTROL SYSTEM
BE-65
2043 Author
: Date
:
1997 SUPRA (RM502U)
INSPECTION
1. INSPECT POWER SEAT SWITCH CONTINUITY
Slide:
Switch positionTester connectionSpecified condition
ForwardA1-A3, A2-A4Continuity
OffA1-A3, A1-A4Continuity
BackA1-A4, A2-A3Continuity
Reclining:
Switch positionTester connectionSpecified condition
ForwardA1-B1, A2-B2Continuity
OffA1-B1, A1-B2Continuity
BackA1-B2, A2-B1Continuity
If continuity is not as specified, replace the switch.
2. INSPECT SLIDE MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
2 and the negative (-) lead to terminal 1, and check that
the motor turns counterclockwise.
(b) Reverse the polarity, and check that the motor turns
clockwise.
If operation is not as specified, replace the motor.
3. INSPECT PTC THERMISTOR OPERATION
(a) Separate power seat adjuster from front seat.
(b) Connect the positive (+) lead from the battery to terminal
2, the positive (+) lead from the ammeter to terminal 1,
and the negative (-) lead to battery negative (-) terminal,
and move the seat front end position.
(c) Continue to apply voltage, and check the current changes
to less than 1 A within 4 to 90 seconds.
(d) Disconnect the lead from terminals.
(e) Approximately 60 seconds later , connect the positive (+)
lead from battery to terminal 1 and the negative (-) lead
to terminal 2, and check that the seat begins to move
backwards.
If operation is not as specified, replace the motor.

N09814
N09815
N19851
N19852
BE-66
- BODY ELECTRICALPOWER SEAT CONTROL SYSTEM
2044 Author
: Date
:
1997 SUPRA (RM502U)
4. INSPECT RECLINING MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
2 and negative (-) lead to terminal 1, and check that the
motor turns counterclockwise.
(b) Reverse the polarity, and check that the motor turns
clockwise.
If operation is not as specified, replace the motor.
5. INSPECT PTC THERMISTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
2.
(b) Connect the positive (+) lead from the ammeter to termi-
nal 1 and the negative (-) lead to battery negative (-) ter-
minal.
(c) Check that the seat back is reclined to the most forward
position.
(d) Continue to apply voltage, and check the current change
to less than 1 A within 4 to 90 seconds.
(e) Disconnect the lead from terminals.
(f) Approximately 60 seconds later, connect the positive (+)
lead from the battery to terminal 1 and the negative (-)
lead to terminal 2, and check that the seat back starts to
fall backwards.
If operation is not as specified, replace the motor.

Z18238
Outer Rear View Mirror LHOuter Rear View Mirror RH
Mirror Defogger Mirror Motor
Mirror Switch
PAD No.2 Fuse

J/B No.1



BE0EI-01
- BODY ELECTRICALPOWER MIRROR CONTROL SYSTEM
BE-67
2045 Author
: Date
:
1997 SUPRA (RM502U)
POWER MIRROR CONTROL SYSTEM
LOCATION

BE0EJ-01
Z14748
N08882
N08883
BE-68
- BODY ELECTRICALPOWER MIRROR CONTROL SYSTEM
2046 Author
: Date
:
1997 SUPRA (RM502U)
INSPECTION
1. INSPECT MIRROR SWITCH CONTINUITY
Left Side
Switch positionTester connectionSpecified condition
OFF-No continuity
UP2 - 5, 6 - 8Continuity
DOWN2 - 6, 5 - 8Continuity
LEFT1 - 8, 2 - 5Continuity
RIGHT1 - 2, 5 - 8Continuity
Right Side
Switch positionTester connectionSpecified condition
OFF-No continuity
UP2 - 5, 3 - 8Continuity
DOWN2 - 3, 5 - 8Continuity
LEFT2 - 5, 7 - 8Continuity
RIGHT2 - 7, 5 - 8Continuity
If continuity is not as specified, replace the switch.
2. INSPECT MIRROR MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
3 and negative (-) lead to terminal 4, and check that the
mirror turns upward.
(b) Reverse the polarity, and check that the mirror turns to
downward.
(c) Connect the positive (+) lead from the battery to terminal
5 and negative (-) lead to terminal 4, and check that the
mirror turns to left side.
(d) Reverse the polarity, and check that the mirror turns to
right side.
If operation is not as specified, replace the mirror.

Z18233
Seat Heater Relay (for Driver's)
Seat Heater Relay (for Passenger's) Seat Heater Switch
SEAT-HTR Fuse
(Seat Cushion) Seat Heater
Seat Heater
(Seat Back) J/B No.1


BE0EK-01
- BODY ELECTRICALSEAT HEATER SYSTEM
BE-69
2047 Author
: Date
:
1997 SUPRA (RM502U)
SEAT HEATER SYSTEM
LOCATION

BE0EL-01
Z09260
N08884
Z09261
Connector ºAº
Connector ºBº BE-70
- BODY ELECTRICALSEAT HEATER SYSTEM
2048 Author
: Date
:
1997 SUPRA (RM502U)
INSPECTION
1. INSPECT SEAT HEATER SWITCH CONTINUITY
ConditionTester connectionSpecified condition
SW ON (LEFT)2 - 4Continuity
SW ON (RIGHT)4 - 6Continuity
SW OFF -No continuity
Illumination circuit3 - 5Continuity
If continuity is not as specified, replace the switch or bulb.
2. INSPECT SEAT HEATER SWITCH INDICATOR
(a) Connect the positive (+) lead from the battery to terminal
2 and 6 and the negative (-) lead to terminal 1.
(b) Push the switches, check that the indicator lights up.
If operation is not as specified, replace the switch and inspect
the circuits connected to other parts.
3. INSPECT SEAT CUSHION CONTINUITY
(a) Heat the thermostat with a light.
(b) Inspect the seat heater continuity between terminals.
Tester connectionConditionSpecified condition
A1 - A2ConstantContinuity
A1 - B2ConstantContinuity
A2 - B2ConstantContinuity
A3 - A4Seat heater temperature
below 25°C (77°F)Continuity
A4 - B1Seat heater temperature
below 25°C (77°F)Continuity
A3 - A4Seat heater temperature
above 45°C (113°F)No Continuity
A4 - B1Seat heater temperature
above 45°C (113°F)No Continuity
If continuity is not as specified, replace the seat cushion pad.

Z09262
Seat Back Side
Z09263
- BODY ELECTRICALSEAT HEATER SYSTEM
BE-71
2049 Author
: Date
:
1997 SUPRA (RM502U)
4. INSPECT SEAT BACK CONTINUITY
Inspect the seat heater continuity between terminals, as
shown.
Tester connectionConditionSpecified condition
1 - 3ConstantContinuity
2 - 4ConstantContinuity
If continuity is not as specified, replace the seat back pad.
5. INSPECT SEAT HEATER RELAY CONTINUITY
ConditionTester connectionSpecified condition
Constant1 - 3Continuity
Apply B+ between
terminals 1 and 3.2 - 4Continuity
If continuity is not as specified, replace the relay.

BE0EM-01
The radio wave bands used in radio broadcasting are as follows:
Frequency
Designation
Radio wave
Modulation method
LF: Low frequency MF: Medium Frequency HF: High Frequency VHF: Very High FrequencyAmplitude modulationFrequency modulation 30 kHz
300 kHz3 MHz 30 MHz 300 MHz
LF
MFHFVHF
AM FM
BE2818
FM (Stereo)
FM (Monaural)
AM
BE2819
FadingIonosphere BE-72
- BODY ELECTRICALAUDIO SYSTEM
2050 Author
: Date
:
1997 SUPRA (RM502U)
AUDIO SYSTEM
DESCRIPTION
1. RADIO WAVE BAND
2. SERVICE AREA
There are great differences in the size of the service area for AM
and FM monaural. Sometimes FM stereo broadcasts cannot be
received even through AM can be received in very clearly.
Not only does FM stereo have the smallest service area, but it
also picks up static and other types of interference (ºnoiseº)
easily.
3. RECEPTION PROBLEMS
Besides the problem of static, there are also the problems
called ºfadingº, ºmultipathº and ºfade outº. These problems are
caused not by electrical noise but by the nature of the radio
waves themselves.
(a) Fading
Besides electrical interference, AM broadcasts are also
susceptible to other types of interference, especially at
night. This is because AM radio waves bounce off the ion-
osphere at night. These radio waves then interfere with
the signals from the same transmitter that reach the ve-
hicle's antenna directly. This type of interference is called
ºfadingº.

BE2820
Multipath
BE2821
Fade Out
N17398
Example :
HeadCapstan
Pinch Roller
- BODY ELECTRICALAUDIO SYSTEM
BE-73
2051 Author
: Date
:
1997 SUPRA (RM502U)
(b) Multipath
One type of interference caused by the bounce of radio
waves off of obstructions is called ºmultipathº. Multipath
occurs when a signal from the broadcast transmitter an-
tenna bounces off buildings and mountains and interferes
with the signal that is received directly.
(c) Fade Out
Because FM radio waves are of higher frequencies than
AM radio waves, they bounce off buildings, mountains,
and other obstructions. For this reason, FM signals often
seem to gradually disappear or fade away as the vehicle
goes behind a building or other obstruction. This is called
ºfade outº.
4. COMPACT DISC PLAYER
Compact Disc (hereafter called ºCDº) Players use a laser beam
pick-up to read the digital signals recorded on the CD and re-
produce analog signals of the music, etc. There are 4.7 in. (12
cm) and 3.2 in. (8 cm) discs in the CD player.
HINT:
Never attempt to disassemble or oil any part of the player unit.
Do not insert any object other than a disc into the magazine.
NOTICE:
CD players use an invisible laser beam which could cause
hazardous radiation exposure. Be sure to operate the play-
er correctly as instructed.
5. Tape Player/Head Cleaning:
MAINTENANCE
(a) Raise the cassette door with your finger.
Next, using a pencil or similar object, push in the guide.
(b) Using a cleaning pen or cotton applicator soaked in clean-
er, clean the head surface, pinch rollers and capstans.

BE4331
BE2826
Cassette Tape Slot Cover BE-74
- BODY ELECTRICALAUDIO SYSTEM
2052 Author
: Date
:
1997 SUPRA (RM502U)
6. CD Player/Disc Cleaning:
MAINTENANCE
If the disc gets dirty, clean the disc by wiping the surface from
the center to outside in the radial directions with a soft cloth.
NOTICE:
Do not use a conventional record cleaner or anti-static pre-
servative.
7. ANTI-THEFT SYSTEM
HINT:
The words ºANTI-THEFT SYSTEMº are displayed on the cas-
sette tape slot cover.
For operation instructions for the anti-theft system, please con-
sult the audio system section in the Owner's Manual (hereafter
called O/M).
(a) Setting system
The system is in operation once the customer has pushed
the required buttons and entered the customer-selected
3-digit ID number.
(Refer to the O/M section, ºSetting the anti-theft systemº)
HINT:

When the audio system is shipped, the ID number has not
been input, so the anti-theft system is not in operation.

If the ID number has not been input, the audio system re-
mains the same as a normal audio system.
(b) Anti-theft system operation
If the normal electrical power source (Connector or bat-
tery terminal) is cut off, the audio system becomes inoper-
able, even if the power supply resumes.
(c) Canceling system
The ID number chosen by the customer is input to cancel
the anti-theft system
(Refer to the O/M section, ºIf the system is activatedº)
HINT:
To change or cancel the ID number, please refer to the O/M
ºCancelling the systemº.