Page 204 of 1807
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.
Page 205 of 1807
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.
Page 206 of 1807
N08130
Z07427
Ignition
Switch
BatteryWarning Light
N08958
32
1 270° BE-50
- BODY ELECTRICALCOMBINATION METER
2028 Author: Date:
1997 SUPRA (RM502U)
23. INSPECT DOOR COURTESY SWITCH CONTINUITY
Switch positionTester connectionSpecified condition
ON (SW pin released)1 - 2, 2 - 3Continuity
OFF
(SW pin pushed in)-No continuity
If continuity is not as specified, replace the switch.
24. INSPECT OPEN DOOR WARNING LIGHT
Disconnect the connector from the door courtesy switch,
ground terminal 1 on the wire harness side connector and
check that the warning light lights up.
If the warning light does not light up, inspect the bulb or wire har-
ness.
25. INSPECT LIGHT CONTROL RHEOSTAT
(a) Connect the positive (+) lead from the battery to terminal
1 and negative lead (-) to terminal 3.
(b) Connect the positive (+) lead from the voltmeter to termi-
nal 2 and negative lead to terminal 3.
(c) Turn the rheostat knob and check that the voltage
changes.
Page 207 of 1807
N08953
N08954
BE6219
Junction Block Side
Connector ºAº
- BODY ELECTRICALCOMBINATION METER
BE-51
2029 Author: Date:
1997 SUPRA (RM502U)
26. INSPECT INTEGRATION RELAY OPERATION
(a) Connect the positive (+) lead from the battery to terminals
1 and 7.
(b) Connect the positive (+) lead from the battery to terminal
9 through a 3.4 W test bulb.
(c) Check that the test bulb lights up and buzzer sounds for
4 - 8 seconds when the negative (-) lead from the battery
is connected to terminal 10.
(d) Check that the buzzer sounding in (c) stops when the
negative (-) lead from the battery is connected to terminl
8.
If operation is not as specified, replace the integration relay.
27. INSPECT RELAY CIRCUIT
Remove the relay from the junction block No. 1 and inspect the
connectors on the junction block side.
Tester connectionConditionSpecified condition
4 - GroundDriver's door openContinuity
4 - GroundDriver's door closeNo continuity
5 - GroundIgnition key SetContinuity
5 - GroundIgnition key removeNo continuity
8 - GroundDriver's seat belt fastenContinuity
8 - GroundDriver's seat belt unfastenNo continuity
10 - GroundConstantContinuity
1 - GroundConstantBattery positive voltage
9 - GroundIgnition switch position ONBattery positive voltage
9 - GroundIgnition switch position LOCK or ACCNo Voltage
If circuit is not as specified, tray replacing the relay with a new
one.
Page 212 of 1807
BE0ED-01
N08876
Connector B Connector A
10
7
N08877ON
Z05932
BE4029
Tester Probe
Heat Wire
TIn Foil BE-56
- BODY ELECTRICALDEFOGGER SYSTEM
2034 Author: Date:
1997 SUPRA (RM502U)
INSPECTION
1. INSPECT DEFOGGER SWITCH OPERATION
(a) Connect the positive (+) lead from the voltmeter to termi-
nal 7 of connector B and the negative (-) lead from volt-
meter to terminal 10 of connector B.
(b) When the switch is off, the voltage should be approx. 12
V.
(c) When the switch is on, check that the indicator light lights
up and that the voltage is less than 1 V.
(d) After 15 minutes, check that the switch is off and the volt-
age is approx. 12 V.
2. INSPECT A/C AMPLIFIER
See page DI-71 1
3. INSPECT DEFOGGER 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.
4. INSPECT DEFOGGER WIRE
NOTICE:
When cleaning the glass, use a soft, dry cloth, and
wipe the glass in the direction of the wire. Take care
not to damage the wires.
Do not use detergents or glass cleaners with abrasive
ingredients.
When measuring voltage, wind a piece of tin foil
around the top of the negative probe and press the foil
against the wire with your finger, as shown.
Page 216 of 1807
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.
Page 226 of 1807
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.
Page 327 of 1807
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.
