Page 160 of 1807

BE-4
- BODY ELECTRICALBODY ELECTRICAL SYSTEM
1982 Author: Date:
1997 SUPRA (RM502U) Taillight does not light with light control SW in TAIL.
1. Taillight Relay (J/B No.1)
2. Integration Relay
3. Light Control Switch
4. Wire HarnessBE-17
BE-13
BE-17
Taillight does not go out with light control SW in OFF.
1. Taillight Relay (J/B No.1)
2. Integration Relay
3. Light Control switch
4. Wire HarnessBE-17
BE-13
BE-17
Headlight and Taillight do not light with engine running and light
control SW in OFF.
1. GAUGE Fuse (J/B No.1)
2. Generator L Terminal
3. D.R.L. Relay
4. D.R.L. No.2 Relay (R/B No.2)
5. D.R.L. No.3 Relay
6. Parking Brake Switch
7. Wire Harness
BE-17
BE-17
BE-17
BE-43
FOG LIGHT SYSTEM
SymptomSuspect AreaSee page
Fog light does not light with light control SW HEAD.
(Headlight is normal.)
1. FOG Fuse (R/B No.2)
2. HEAD Fuse (R/B No.2)
3. Fog Light Relay (R/B No.2)
4. Fog Light Switch
5. Wire Harness
BE-23
BE-23
Fog light does not light with light control SW HEAD.
(Headlight does not light)1. Headlight and Taillight system
2. Wire HarnessBE-15
Only one light does not light.1. Bulb
2. Wire Harness
TURN SIGNAL HAZARD WARNING SYSTEM
SymptomSuspect AreaSee page
ºHazardº and ºTurnº do not light up.
1. Hazard Warning Switch
2. Turn Signal Flasher
3. Wire HarnessBE-26
BE-26
The flashing frequency is abnormal.
1. Bulb
2. Turn Signal Flasher
3. Wire Harness
BE-26
Hazard warning light does not light up.
(Turn is normal.)1. HAZ-HORN Fuse (R/B No.2)
2. Wire Harness
Hazard warning light does not light up in one direction.1. Hazard Warning Switch
2. Wire HarnessBE-26
Turn signal does not light up.
(Combination meter, wiper and washer do not operate.)
1. TURN Fuse (J/B No.1)
2. Ignition Switch
3. Turn Signal Switch
4. Wire Harness
BE-13
BE-26
Turn signal does not light up.
1. TURN Fuse (J/B No.1)
2. Turn Signal Switch
3. Wire Harness
BE-26
Turn signal does not light up in one direction.1. Turn Signal Switch
2. Wire HarnessBE-26
Only one bulb does not light up.1. Bulb
2. Wire Harness
Page 164 of 1807

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
Page 182 of 1807

BE0DY-02
Z09367
Right Turn
Left Turn
Connector ºAº
BE1843
2
Turn Signal Light Bulbs (21W)13
Z09334
BE-26
- BODY ELECTRICALTURN SIGNAL AND HAZARD WARNING SYSTEM
2004 Author: Date:
1997 SUPRA (RM502U)
INSPECTION
1. INSPECT TURN SIGNAL SWITCH CONTINUITY
Switch positionTester connectionSpecified condition
Left turnA1 - A5Continuity
Neutral-No continuity
Right turnA1 - A8Continuity
If continuity is not as specified, replace the switch.
2. INSPECT TURN SIGNAL FLASHER OPERATION
(a) Connect the terminal 2 to battery positive (+) terminal and
the terminal 3 to battery negative (-) terminal.
(b) Connect the 2 turn signal light bulbs parallel to each other
to terminals 1 and 3, check that the bulbs flash.
HINT:
The turn signal lights should flash between 60 and 120 times
per minute.
3. INSPECT HAZARD WARNING SWITCH CONTINUITY
ConditionTester connectionSpecified condition
Switch OFF7 - 10Continuity
Switch ON7 - 8
4 - 5 - 6 - 9Continuity
Illumination circuit2 - 3Continuity
If continuity is not as specified, replace the switch.
BE3QR-01
Page 197 of 1807

I02078
Cruise Control Indicator :Fuel Gauge
:Engine Coolant Temperature Gauge
:Tachometer
:Speedometer
D.R.L. :Daytime Running Light
* :Engine Oil Level Delay Circuit
F
E
T
S
F
E
T
S C8
A10
A11
A9
A8
A13
C11
C10
B13
B12
B2
A1
C7
C5
A14
A7
A6
A3
C1
C2
C13
A5P
R
N
D
2
LB4
B10
B6
B7
B8
B11
B1
C9
A16
C4
C6
A15
A2
B3
C12 Fuel Level Warning
MANU Indicator
O/D OFF Indicator
Brake Warning
Bulb Check Relay
TRAC Indicator
Right Turn Indicator
High Beam Indicator
Master Warning
Illumination
SNOW IndicatorLeft Turn Indicator
No. Wire Harness Side
Brake Fluid Level Warning Switch
Parking Brake Switch
USA:TAIL (RH) Fuse, PANEL Fuse
Headlight Dimmer Switch
ECT ECU
Cruise Control ECU
TRAC ECU
Ground (Engine)
Engine Coolant Temperature Sender Gauge
Fuel Sender Gauge
Ground (Signal)
Turn Signal Switch
Starter Relay Generator L Terminal Igniter
Park/Neutral Position Switch (A/T Vehicle) A1
2
3
5
6
7
8
9
10
11
13
14
15
16
BGAUGE Fuse
O/D OFF Switch
USA:TAIL (RH) Fuse, PANEL Fuse
Park/Neutral Position Switch (P)
Park/Neutral Position Switch (N)
ECT ECU
Ground (Power)
Park/Neutral Position Switch (D)
Park/Neutral Position Switch (2)
Park/Neutral Position Switch (L) Park/Neutral Position Switch (R) 1
2
3
6
7
8
10
11
124
13
Engine Oil Level Sensor
Turn Signal Switch
Ground (Power)
Fuel Sender Gauge
GAUGE Fuse
Vehicle Speed Sensor (Terminal 2)
Vehicle Speed Sensor (Terminal 3)
USA:TAIL (RH) Fuse, PANEL Fuse
Light Control Rheostat Telltail Light RH (Terminal 11)
Telltail Light LH (Terminal 1)
Telltail Light LH (Terminal 6) 1
2
6
7
8
10
11
124
135
9 CCANADA:D.R.L. No.3 Relay
Clutch Start Switch (M/T Vehicle)
CANADA:D.R.L. No.3 Relay
CANADA:D.R.L. No.3 Relay
- BODY ELECTRICALCOMBINATION METER
BE-41
2019 Author: Date:
1997 SUPRA (RM502U)
Page 773 of 1807
F03341
R/B No.2J/B No.1Stop Light
SwitchABS ECU
125
Light
Failure
Sensor
Stop LightJ/B
No.11
10IH
IC
A18 A22 *1*2
G-WG-W
G-W1
2 W STOP
210
1B 1I W-LPOWER
22 W
2
2A
ALTR/B No.2
B
Battery
NORMAL ABS (2JZ-GE Engine)
SPORT ABS (2JS-GTE Engine)
*1:
*2:
1
DI-482
- DIAGNOSTICSANTI-LOCK BRAKE SYSTEM
710 Author: Date:
1997 SUPRA (RM502U)
DTC 49 Stop Light Switch Circuit
CIRCUIT DESCRIPTION
This stop light switch senses whether the brake pedal is depressed or released, and sends a signal to the
ECU.
DTC No.DTC Detecting ConditionTrouble Area
491.2 - 1.7 V of STP voltage is continued for 0.3 sec. or more.Open in stop light circuit
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check operation of stop light.
CHECK:
Check that stop light lights up when brake pedal is depressed and turns off when brake pedal is released.
NG Replace stop light bulb.
OK
DI4VI-01
Page 1209 of 1807
15A
HEAD (
RH)
(
USA)
25
6
1
IF2 13 IF1 6IB1 2
IF2 1IF24IF114
IE1 1IE12IE13
BP1 5 BP13BP11 II1 24 II1 19 A 2A 16 A15 B6
A 7A6A3A9A8B8A10 A11 A13
II1 29
SLIP
CRUISE
HIGH BEAM
WATER TEMP.
FUEL
FUEL
TACHO
IJ213
IE EC IFI 3 FROM POWER SOURCE SYSTEM (
SEE PAGE 56)
IJ29
EXT
I 4
E10
C 9
P 2
COMBINATION METER FROM HEADLIGHT HI RH
FUEL SENDERIGNITER
ENGINE CONTROL MODULE
CLUTCH START
SW
PARK/NEUTRAL POSITION
SW Y- G
Y- B
BR BRY- B Y- GBR Y- RR- LO W
Y- G
Y- B
BR
B- W B- W
B- W BRBR Y- L (
*3) R- L W- BW
O TO THROTTLE E CU
TO CRUISE CONTROL
ECU
TO DI MME R SW
[COMB. SW]
ENGINE COOLANT TEMP. SENDER
LH
RH TURNB
(
A/T)
B
(
M/T)B- W
(
M/T) R- W
(
*1)
B- W
G- B
G- Y R- W R- W
R- W
G- B
G- YB- WB
B BR
BR
(
*4)
(
*3) (
*1)
BULB
CHECK RELAY
123416FROM TURN SIGNAL SW
[COMB. SW]
1 2
(
*2)
E 4
C
C10 , C11
, C1 2
BA
(
*3)
1I 4
B (
*3)
Y- R (
*4)
(
A/ T)
(
A/T)(
A/T) (
*2)
TACO
F14
2
P
N
1E 19 1E14 1H 11 1H7
7. 5A
ST
1K 4
220
COMBINATION METER