1997 TOYOTA SUPRA check engine

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)

BE1L4-01
N06334
- BODY ELECTRICALCOMBINATION METER
BE-43
2021 Author
: Date
:
1997 SUPRA (RM502U)
INSPECTION
1. INSPECT SPEEDOMETER ON-VEHICLE
Using a speedometer tester, inspect the speedometer for allow-
able indication error and check the operation of the odometer.
HINT:
Tire wear and tire over or under inflation will increase the indica-
tion error.
If error is excessive, replace the speedometer.
USA (mph)CANADA (km/h)
Standard indication Allowable rangeStandard indication Allowable range
20 18 - 24 20 17 - 24
40 38 - 44 40 38 - 46
60 56 - 66 60 57.5 - 67
80 78 - 88 80 77 - 88
100 98 - 110 100 96 - 109
120 118 - 132 120 115 - 130
140 134 - 151.5
160 153 - 173
2. INSPECT VEHICLE SPEED SENSOR OPERATION
(a) Connect the positive (+) lead from battery to terminal 1
and negative (-) lead to terminal 2.
(b) Connect the positive (+) lead from tester to terminal 3 and
negative (-) lead to terminal 2.
(c) Rotate shaft.
(d) Check that there is voltage change from approx. 0 V to 11
V or more between terminals 2 and 3.
HINT:
The voltage change should be 4 times for every revolution of
the speed sensor shaft.
If operation is not as specified, replace the sensor.
3. INSPECT TACHOMETER ON-VEHICLE
(a) Connect a tune-up test tachometer, and start the engine.
NOTICE:
Reversing the connection of the tachometer will damage
the transistors and diodes inside.
(b) Compare the tester and tachometer indications.
If error is excessive, replace the tachometer.
RPM (DC 13.5 V, 25 °C (77°F))
Standard indication (rpm)Allowable range (rpm)
700630 - 770
1,000915 - 1,115
2,0001,920 - 2,220
3,0002,890 - 3,350
4,0003,940 - 4,400
5,0005,025 - 5,425
6,5006,650 - 6,950
7,0007,025 - 7,625

Z07423
Ignition
Switch
Battery Engine Coolant Temperature Gauge
Sender
Gauge
Z14747
Battery Engine Coolant Temperature Gauge
Test Bulb
(3W)
Z09421
A
BC
N15887
BE-46
- BODY ELECTRICALCOMBINATION METER
2024 Author
: Date
:
1997 SUPRA (RM502U)
10. INSPECT ENGINE COOLANT TEMPERATURE RE-
CEIVER GAUGE OPERATION
(a) Disconnect the connector from the sender gauge.
(b) Turn the ignition switch ON, check that the receiver gauge
needle indicates COOL.
(c) Ground terminal on the wire harness side connector
through a 3 W test bulb.
(d) Turn the ignition switch ON, check that the bulb lights up
and that the receiver gauge needle moves toward the hot
side.
If operation is as specified, replace the sender gauge.
Then recheck the system.
If operation is not as specified, measure the receiver gauge re-
sistance.
11. INSPECT ENGINE COOLANT TEMPERATURE RE-
CEIVER GAUGE RESISTANCE
Measure the resistance between terminals.
HINT:
Connect the test leads so that the current from the ohmmeter
can flow according to the chart order.
Between terminalsResistance (W)
A - BApprox. 229.7
A - CApprox. 54.0
B - CApprox. 175.7
If resistance value is not as specified, replace the engine cool-
ant temperature receiver gauge.
12. INSPECT ENGINE COOLANT TEMPERATURE SEND-
ER GAUGE RESISTANCE
Measure the resistance between terminal and gauge body.
Temperature °C (°F)Resistance (W)
50 (122.0)160 ~ 240
120 (248.0)17.1 ~ 21.2
If resistance value is not as specified, replace the engine cool-
ant temperature sender gauge.

N06640
BE0044
Ignition
Switch
BatteryWarning Light
N09645
ON
OFF
N09646
ON
OFF
Z07431
Ignition
Switch
BatteryWarning Light
- BODY ELECTRICALCOMBINATION METER
BE-47
2025 Author
: Date
:
1997 SUPRA (RM502U)
13. INSPECT LOW OIL PRESSURE SWITCH CONTINUITY
(a) Check that there is continuity between terminal and
ground with the engine stopped.
(b) Check that there is no continuity between terminal and
ground with the engine running.
HINT:
Oil pressure should be over 29 kPa (0.3 kgf/cm
2, 4.3 psi)
If operation is not as specified, replace the switch.
14. INSPECT LOW OIL PRESSURE WARNING LIGHT
(a) Disconnect the connector from the warning switch and
ground terminal on the wire harness side connector.
(b) Turn the ignition switch ON, check that the warning light
lights up.
If the warning light does not light up, test the bulb or inspect wire
harness.
15. INSPECT ENGINE OIL LEVEL WARNING SWITCH
CONTINUITY
(a) Check that there is continuity between terminal with the
switch in each position.
(b) Heat the switch to above 60°C (140°F) in an oil bath.
(c) Check that there is continuity between terminals with the
switch ON (float up).
(d) Check that there is no continuity between terminals with
the switch OFF (float down).
If operation is not as specified, replace the switch.
16. INSPECT ENGINE OIL LEVEL WARNING LIGHT
(a) Disconnect the connector from the switch.
(b) Ground terminal 1 on the wire harness connector.
(c) Turn the ignition switch ON. Check that the warning light
lights up approximately 40 seconds later.
If the warning light does not light up, inspect bulb or wire har-
ness.

N08966
BE1217
Ignition
Switch
BatteryWarning Light
N09510
BE0044
Ignition
Switch
BatteryWarning Light BE-48
- BODY ELECTRICALCOMBINATION METER
2026 Author
: Date
:
1997 SUPRA (RM502U)
17. INSPECT BRAKE FLUID LEVEL WARNING SWITCH
CONTINUITY
(a) Remove the reservoir tank cap and strainer.
(b) Disconnect the connector.
(c) Check that there is no continuity between terminals with
the switch OFF (float up).
(d) Use syphon, etc. to take fluid out of the reservoir tank.
(e) Check that there is continuity between terminals with the
switch ON (float down).
(f) Pour the fluid back in the reservoir tank.
If operation is not as specified, replace the switch.
18. INSPECT BRAKE FLUID LEVEL WARNING LIGHT
(a) Disconnect the connector from the brake fluid warning
switch.
(b) Release the parking brake pedal.
(c) Connect terminals on the wire harness side of the level
warning switch connector.
(d) Start the engine, check that the warning light lights up.
If the warning light does not light up, test the bulb or wire har-
ness.
19. INSPECT PARKING BRAKE SWITCH CONTINUITY
(a) Check that there is continuity between terminal and
switch body with the switch ON (switch pin released).
(b) Check that there is no continuity between terminal and
switch body with the switch OFF (switch pin pushed in).
If operation is not as specified, replace the switch or inspect
ground point.
20. INSPECT PARKING BRAKE WARNING LIGHT
(a) Disconnect the connector from the parking brake switch
and the brake fluid warning switch.
(b) Ground terminal on the wire harness side connector.
(c) Start the engine, check that the warning light lights up.
If the warning light does not light up, test the bulb or inspect wire
harness.

Z07425
12
10
111 2 345
6
789
Wire Harness Side
Z07426
Ignition
Switch
BatteryWarning Light
- BODY ELECTRICALCOMBINATION METER
BE-49
2027 Author
: Date
:
1997 SUPRA (RM502U)
21. INSPECT LIGHT FAILURE SENSOR CIRCUIT
Disconnect the connector from the sensor and inspect the con-
nector on the wire harness side, as shown.
Tester connectionConditionSpecified condition
1 - GroundConstantContinuity*
2 - GroundConstantContinuity*
9 - GroundConstantContinuity*
10 - GroundConstantContinuity*
11 - GroundConstantContinuity
12 - GroundConstantContinuity*
3 - GroundLight control switch position OFFNo Voltage
3 - GroundLight control switch position TAIL or HEADBattery positive voltage
4 - GroundIgnition switch position LOCK or ACCNo voltage
4 - GroundIgnition switch position ONBattery positive voltage
7 - GroundStop light switch position OFFNo voltage
7 - GroundStop light switch position ONBattery positive voltage
8 - GroundEngine condition StopNo voltage
8 - GroundEngine condition RunningBattery positive voltage
*: There is the resistance because this circuit is grounded
through the bulb.
If circuit is as specified, replace the sensor.
If the circuit is not as specified, inspect the circuits connected
to other parts.
22. INSPECT LIGHT FAILURE WARNING LIGHT
(a) Disconnect the connector from the light failure sensor and
ground terminal 4 on the wire harness side connector.
(b) Start the engine, check that the warning light lights up.
If the warning light does not light up, test the bulb or inspect wire
harness.

R07175
Stop Light Switch
Push Rod
Pedal HeightBR1AW-01
BR4980
A
R00085
Pedal Freeplay
- BRAKEBRAKE PEDAL
BR-7
1807 Author
: Date
:
1997 SUPRA (RM502U)
BRAKE PEDAL
ON-VEHICLE INSPECTION
1. CHECK THAT PEDAL HEIGHT IS CORRECT
Pedal height from asphalt sheet:
154.2 - 164.2 mm (6.071 - 6.465 in.)
If the pedal height is incorrect, adjust it.
2. IF NECESSARY, ADJUST PEDAL HEIGHT
(a) Remove the lower instrument panel and finish panel.
(b) Disconnect the connector from the stop light switch.
(c) Loosen the stop light switch lock nut and remove the stop
light switch.
(d) Loosen the push rod lock nut.
(e) Adjust the pedal height by turning the pedal push rod.
(f) Tighten the push rod lock nut.
Torque: 25 N´m (260 kgf´cm, 19 ft´lbf)
(g) Install the stop light switch and turn it until it lightly con-
tacts the pedal stopper.
(h) Turn the stop light switch back one turn.
(i) Check the clearance (A) between stop lights switch and
pedal.
Clearance: 0.5 - 2.4 mm (0.020 - 0.094 in.)
(j) Tighten the stop light switch lock nut.
(k) Connect the connector to the stop light switch.
(l) Check that the stop lights come on when the brake pedal
is depressed, and go off when the brake pedal is re-
leased.
(m) After adjusting the pedal height, check the pedal freeplay.
If clearance (A) between the stop light switch and the brake
pedal stopper has been adjusted correctly, the pedal freeplay
will meet the specifications.
(n) Install the lower instrument panel and finish panel.
3. CHECK PEDAL FREEPLAY
(a) Stop the engine and depress the brake pedal several
times until there is no more vacuum left in the booster.
(b) Push in the pedal by hand until the second point of resis-
tance begins to be felt, then measure the distance, as
shown.
Pedal freeplay: 1 - 6 mm (0.04 - 0.24 in.)
If incorrect, check the stop light switch clearance. If the clear-
ance is OK, then troubleshoot the brake system.

R00135
BR-8
- BRAKEBRAKE PEDAL
1808 Author
: Date
:
1997 SUPRA (RM502U)
HINT:
The freeplay to the 1st point of resistance is due to the play be-
tween the clevis and pin. It is 1 - 3 mm (0.04-0.12 in.) on the
pedal.
4. CHECK PEDAL RESERVE DISTANCE
(a) Release the parking brake.
(b) With the engine running, depress the pedal and measure
the pedal reserve distance, as shown.
Pedal reserve distance at 490 N (50 kgf, 110.2 lbf):
2JZ-GE Engine: More than 72 mm (2.83 in.)
2JZ-GTE Engine: More than 70 mm (2.76 in.)
If the reserve distance is incorrect, troubleshoot the brake sys-
tem.