TOYOTA SUPRA 1997 Service Repair Manual

- BODY ELECTRICALBODY ELECTRICAL SYSTEM
BE-5
1983 Author
: Date
:
1997 SUPRA (RM502U)
INTERIOR LIGHT SYSTEM
SymptomSuspect AreaSee page
Only one light does not light up.1. Bulb
2. Wire Harness
Interior light does not light up (All).
1. DOME Fuse (R/B No.2)
2. Integration Relay
3. Wire Harness
BE-28
ºIlluminated Entry Systemº does not operate.
1. Integration Relay
2. Door Courtesy Switch
3. Door Key Lock and Unlock Switch
4. Door Unlock Detection Switch
5. Wire HarnessBE-28
BE-28
DI-656
DI-638
Front personal light does not light up.
1. Bulb
2. Front Personal Light
3. Wire Harness
BE-28
Luggage room light does not light up.1. Bulb
2. Luggage Room Light Switch
BE-28
BACK-UP LIGHT SYSTEM
SymptomSuspect AreaSee page
Back Up Light does not light up.
1. Bulb
2. GAUGE Fuse (J/B No.1)
3. Ignition Switch
4. Back-up Light Switch (M/T)
5. Park/Neutral Position Switch (A/T)
6. Wire Harness
BE-13
BE-31
DI-354
DI-423
Back Up Light remains always on.1. Wire Harness
Only one light does not light up.1. Bulb
2. Wire Harness
STOP LIGHT SYSTEM
SymptomSuspect AreaSee page
Stop light does not light up.
1. Bulb
2. STOP Fuse (J/B No.1)
3. Stop Light Switch
4. Wire Harness
BE-33
Stop light remains always on.1. Stop Light Switch
2. Wire HarnessBE-33
Only one light does not light up.1. Bulb
2. Wire Harness

BE-6
- BODY ELECTRICALBODY ELECTRICAL SYSTEM
1984 Author
: Date
:
1997 SUPRA (RM502U)
WIPER AND WASHER SYSTEM
SymptomSuspect AreaSee page
Wipers and washers do not operate.
1. WIPER Fuse (J/B No.1)
2. Ignition Switch
3. Wiper and Washer Switch
4. Wire Harness
BE-13
BE-35
Front wiper does not operate.
1. Front Wiper and Washer Switch
2. Front Wiper Motor
3. Wire HarnessBE-35
BE-35
Rear wiper does not operate.
1. Rear Wiper and Washer Switch
2. Rear Wiper Motor and Relay
3. Wire HarnessBE-35
BE-35
Front washer does not operate.
1. Front Wiper and Washer Switch
2. Washer Motor
3. Wire HarnessBE-35
BE-35
Rear washer does not operate.
1. Rear Wiper and Washer Switch
2. Washer Motor
3. Wire HarnessBE-35
BE-35
COMBINATION METER
METER, GAUGES AND ILLUMINATION:
SymptomSuspect AreaSee page
Tachometer, Fuel Gauge and Engine Coolant Temperature
Gauge do not operate.1. GAUGE Fuse (J/B No.1)
2. Meter Circuit
3. Wire Harness
BE-40
Speedometer does not operate.
1. Vehicle Speed Sensor
2. Meter Circuit
3. Wire HarnessBE-43
BE-40
Tachometer does not operate.
1. Igniter
2. ECM
3. Meter Circuit
4. Wire Harness
DI-1
DI-145
BE-40
Fuel Gauge does not operate or abnormal operation.
1. Fuel Receiver Gauge
2. Fuel Sender Gauge
3. Meter Circuit
4. Wire HarnessBE-43
BE-43
BE-40
Engine Coolant Temperature Gauge does not operate or
abnormal operation.
1. Engine Coolant Temperature Receiver Gauge
2. Engine Coolant Temperature Sender Gauge
3. Meter Circuit
4. Wire HarnessBE-43
BE-43
BE-40
All illumination lights do not light up.
1. TAIL Fuse (J/B No.1)
2. Light Control Rheostat
3. Meter Circuit
4. Wire Harness
BE-43
BE-40
Only one illumination light does not light up.1. Bulb
2. Meter Circuit
BE-40

- BODY ELECTRICALBODY ELECTRICAL SYSTEM
BE-7
1985 Author
: Date
:
1997 SUPRA (RM502U)
WARNING LIGHTS:
SymptomSuspect AreaSee page
Warning lights do not light up.
(Except Discharge and Door Open)
1. Bulb
2. IGN Fuse (J/B No.1)
3. Ignition Switch
4. Meter Circuit
5. Generator
6. Wire Harness
BE-13
BE-40
Brake Warning Light does not light up.
1. Bulb
2. Brake Fluid Level Warning Switch
3. Parking Brake Switch
4. Bulb Check Relay
5. Meter Circuit
6. Wire Harness
BE-43
BE-43
BE-40
Seat Belt Warning Light does not light up.
1. Bulb
2. Seat Belt Buckle Switch
3. Integration Relay
4. Meter Circuit
5. Wire Harness
BE-43
BE-13
BE-40
Engine Oil Level Warning Light does not light up.
1. Bulb
2. Engine Oil Level Warning Switch
3. Meter Circuit
4. Wire Harness
BE-43
BE-40
Low Oil Pressure Warning Light does not light up.
1. Bulb
2. Low Oil Pressure Warning Switch
3. Meter Circuit
BE-43
BE-40
Door Open Warning Light does not light up.
1. Bulb
2. DOME Fuse (R/B No.2)
3. Door Courtesy Switch
4. Luggage Room Light Switch
5. Integration Relay
6. Meter Circuit
7. Wire Harness
BE-28
BE-28
BE-13
BE-40
Master Warning Light does not light up.
1. Bulb
2. Telltale Light Circuit
3. Meter Circuit
4. Wire Harness
BE-40
BE-40
INDICATOR LIGHTS:
SymptomSuspect AreaSee page
SRS Indicator Light does not light up.
1. Bulb
2. Center Airbag Sensor
3. Wire Harness
DI-555
ABS Indicator Light does not light up.
1. Bulb
2. Traction ECU
3. Wire Harness
DI-499
Malfunction Indicator Light does not light up.
1. Bulb
2. ECM
3. Wire Harness
DI-1
DI-145
TRAC OFF Indicator Light does not light up.
1. Bulb
2. Traction Solenoid Relay
3. Traction ECU
4. Wire Harness
DI-499
DI-499

BE-8
- BODY ELECTRICALBODY ELECTRICAL SYSTEM
1986 Author
: Date
:
1997 SUPRA (RM502U) Security Indicator Light does not light up.
1. Light Emitting Diode
2. Theft Deterrent and Door Lock ECU
3. Wire Harness
DI-608
A/T Shift Position Indicator Light does not light up.
1. Bulb
2. Park/Neutral Position Switch
3. Light Control Rheostat
4. Meter Circuit
5. Wire Harness
DI-354
DI-423
BE-43
BE-40
MANU Indicator Light does not light up.
1. Bulb
2. ECM
3. Meter Circuit
4. Wire Harness
BE-40
O/D OFF Indicator Light does not light up.
1. Bulb
2. O/D Main Switch
3. ECM
4. Meter Circuit
5. Wire Harness
BE-43
DI-1
DI-145
BE-40
TRAC Indicator Light does not light up.
1. Bulb
2. ABS and Traction ECU
3. Meter Circuit
4. Wire Harness
BE-40
Turn Indicator Light does not light up.
1. Bulb
2. Turn Signal and Hazard Warning System
3. Meter Circuit
4. Wire Harness
BE-25
BE-40
High Beam Indicator Light does not light up.
1. Bulb
2. Headlight and Taillight System
3. Meter Circuit
4. Wire Harness
BE-15
BE-40
CRUISE Indicator Light does not light up.
1. Bulb
2. Cruise Control ECU
3. Meter Circuit
4. Wire Harness
DI-660
BE-40
SNOW Indicator Light does not light up.
1. Bulb
2. Traction ECU
3. Meter Circuit
4. Wire Harness
BE-40
ELECTRIC TENSION REDUCER SYSTEM
SymptomSuspect AreaSee page
Tension Reducer does not operate.
(Driver's and Passenger's)1. ECU-IG fuse (J/B No.1)
2. Wire Harness
Tension Reducer does not operate. (Only one side)
1. Buckle Switch
2. Tension Reducer Solenoid
3. Wire HarnessBE-54
BE-43

- 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

BE-10
- BODY ELECTRICALBODY ELECTRICAL SYSTEM
1988 Author
: Date
:
1997 SUPRA (RM502U)
POWER MIRROR CONTROL SYSTEM
SymptomSuspect AreaSee page
Mirror does not operate.
1. RAD No.2 Fuse (J/B No.1)
2. Mirror Switch
3. Mirror Motor
4. Wire Harness
BE-68
BE-68
Mirror operates abnormally.
1. Mirror Switch
2. Mirror Motor
3. Wire HarnessBE-68
BE-68
SEAT HEATER SYSTEM
SymptomSuspect AreaSee page
Seat heaters do not operate. (Driver's and Passenger's)1. SEAT HTR Fuse (J/B No.1)
2. Wire Harness
Driver's seat heater does not operate.
1. Seat Heater Switch (Driver's)
2. Seat Heater
3. Wire HarnessBE-70
BE-70
Passenger's seat heater does not operate.
1. Seat Heater Switch (Passenger's)
2. Seat Heater
3. Wire HarnessBE-70
BE-70
Seat heater temperature is too hot.1. Seat HeaterBE-70

BE0DN-02
Z18242
R/B No.5
R/B No.4
R/B No.1R/B No.2
- BODY ELECTRICALPOWER SOURCE
BE-1 1
1989 Author
: Date
:
1997 SUPRA (RM502U)
POWER SOURCE
LOCATION

BE0DO-02
Z18243
Ignition Switch

Key Unlock Warning Switch BE-12
- BODY ELECTRICALIGNITION SWITCH AND KEY UNLOCK WARNING
SWITCH
1990 Author
: Date
:
1997 SUPRA (RM502U)
IGNITION SWITCH AND KEY UNLOCK WARNING SWITCH
LOCATION

BE1L3-01
Z09193
Z14750
OFF
ON
N16845
- BODY ELECTRICALIGNITION SWITCH AND KEY UNLOCK WARNING
SWITCHBE-13
1991 Author
: Date
:
1997 SUPRA (RM502U)
INSPECTION
1. INSPECT IGNITION SWITCH CONTINUITY
Switch positionTester connectionSpecified condition
LOCK-No continuity
ACC5 - 7Continuity
ON4 - 5 - 7, 2 - 3Continuity
START4 - 7 - 8, 1 - 2 - 3Continuity
If continuity is not as specified, replace the switch.
2. INSPECT KEY UNLOCK WARNING SWITCH CONTI-
NUITY
ConditionTester connectionSpecified condition
SW OFF
(Key removed)-No continuity
SW ON (Key set)1 - 2Continuity
If continuity is not as specified, replace the switch.
3. Key Unlock Warning System:
INSPECT INTEGRATION RELAY OPERATION
(a) Connect the positive (+) lead from the battery to terminal
1, the negative (-) lead to terminals 5 and 10..
(b) Check the buzzer sounds when the negative (-) lead from
the battery is connected to terminal 6..
If operation is not as specified, replace the relay.

Z07373
Junction Block Side
Connector ºAº
Wire Harness Side
Connector ºBº BE-14
- BODY ELECTRICALIGNITION SWITCH AND KEY UNLOCK WARNING
SWITCH
1992 Author
: Date
:
1997 SUPRA (RM502U)
4. INSPECT RELAY CIRCUIT
Light Auto Turn Off System:
Remove the relay from junction block and inspect the connec-
tors on the wire harness and junction block side, as shown in
the chart.
Tester connectionConditionSpecified condition
A6 - GroundDriver's door courtesy switch OFFNo continuity
A6 - GroundDriver's door courtesy switch ONContinuity
A10 - GroundConstantContinuity
B1 - GroundLight control switch position OFF or TAILNo continuity
B1 - GroundLight control switch position HEADContinuity
B4 - GroundLight control switch position OFFNo continuity
B4 - GroundLight control switch position TAIL or HEADContinuity
A1 - GroundConstantBattery positive voltage
A7 - GroundIgnition switch position LOCK or ACCNo voltage
A7 - GroundIgnition switch position ONBattery positive voltage
B2 - GroundConstantBattery positive voltage
B3 - GroundConstantBattery positive voltage
If the circuit is as specified, try replacing the relay with a new
one.
If the circuit not as specified, inspect the circuits connected to
other parts.