1995 TOYOTA SUPRA engine

INSPECTION PROCEDURE
Check that the starter operates normally and that the engine starts.
EG±381 or EG±487.)
(See page IN±30).
on page BE±169.
Proceed to next circuit inspection shown on matrix
chart (See page
BE±170).
(1) See input signal check on page BE±169.
(2) Check the indicator light when shifting into ex±
cept D position.
Check operation of starter.
Check voltage between terminal D of ECU connector and body ground.
(1) Turn ignition switch ON.
(2) Measure voltage between terminal D of ECU
connector and body ground, when shifting into P,
N position and other positions.
Remove ECU with connectors still connected.
Input signal check.
The indicator light goes off when shifting into except D
range.
Proceed to engine troubleshooting (See page
Proceed to next circuit inspection shown on matrix
chart (See page
BE±170).
VoltageShift Position
D range
Other ranges
Check for open in harness and connector between ECU and ST fuse
Repair or replace harness or connector.
Check and replace ECU. BE±192
± BODY ELECTRICAL SYSTEMCRUISE CONTROL SYSTEM

SERVICE SPECIFICATIONS
SERVICE DATA
  INTEGRATION RELAY (Light Auto Cut System) 
  B2 ± Ground (Constant) Battery positive voltage
  B3 ± Ground (Constant) Battery positive voltage
  A7 ± Ground (Ignition SW position LOCK or ACC) No voltage 
 A7 ± Ground (Ignition SW position ON)
 
Battery positive voltage 
  A1 ± Ground (Constant)
 
 Battery positive voltage
  DAYTIME RUNNING LIGHT MAIN RELAY (Wire Harness Side) 
  2 ± Ground (Ignition SW position LOCK or ACC) No voltage
  2 ± Ground (Ignition SW position ON) Battery positive voltage  11 ± Ground (Engine stop) No voltage 
  11 ± Ground (Engine running)
 
 Battery positive voltage
  15 ± Ground (Constant) Battery positive voltage
  17 ± Ground (Constant) Battery positive voltage
  TURN SIGNAL FLASHER 
  Flashes/Minute 60 ± 120 
  INTEGRATION RELAY (Interior Light System)
 
 
  9 ± Ground (Ignition SW position LOCK or ACC) No voltage
  9 ± Ground (Ignition SW position ON) Battery positive voltage
  1 ± Ground (Constant) Battery positive voltage
  SPEEDOMETER (USING A SPEEDOMETER TESTER) 
 
Standard indication (mph)
 
Allowable range (mph) 
 20
 
 18 ± 24
 40 38 ± 44
 60 58 ± 66
 80 78 ± 88 100 98 ± 110 
 120
 
 118 ± 132
 Standard indication (km/h) Allowable range (km/h)
 20 17 ± 24
 40 38 ± 46
 60 57.5 ± 67 
 80
 
 77 ± 88
 100 96 ± 109
 120 115 ± 130
 140 134 ± 151.5
 160 153 ± 173
± BODY ELECTRICAL SYSTEMSERVICE SPECIFICATIONSBE±201

  TACHOMETER (ON±VEHICLE) 
 Standard indication (rpm) Allowable range (rpm)
 700 630 ± 770
 1000 915 ± 1115
 2000 1920 ± 2220
 3000 2890 ± 3350
 4000 3940 ± 4400
50005025 ± 5425 
6500
 
6650 ± 6950 
7000
 
7025 ± 7625  OD/TRIP METER (CONNECTOR CONNECTED) 
  1 ± Ground (Ignition SW position ON) Battery positive voltage  4 ± Ground (Light Control SW position TAIL or HEAD) Battery positive voltage  5 ± 7 (Ignition SW ON and drive the vehicle slowly) OV eBattery positive voltage  6 ± 7 (Ignition SW ON and drive the vehicle slowly) OV emore than 5V  8 ± Ground (Constant) Battery positive voltage 
 
 
10 ± Ground (Ignition SW ON, Light Control SW TAIL or
HEAD and turn the Light Control Rheostat
knob to clockwise) 
 
 6V " 0V
  FUEL RECEIVER GAUGE 
 A ± B Approx. 269.7

 A ± C Approx. 123.5

 B ± C Approx. 146.2

  FUEL SENDER GAUGE 
  Float position: F Approx. 4.0

  Float position: 1/2 Approx. 55.0

  Float position: E Approx. 107.0

  ENGINE COOLANT TEMPERATURE RECEIVER GAUGE 
 A ± B Approx. 229.7

 A ± C Approx. 54.0

 B ± C Approx. 175.7

  ENGINE COOLANT TEMPERATURE SENDER GAUGE 
  50 °C (122.0 °F) 160 ± 240

  120 °C (248.0 °F) 17.1 ± 21.2

  LIGHT FAILURE SENSOR 
  3 ± Ground (Light Control SW position OFF) No voltage
  3 ± Ground (Light Control SW position TAIL or HEAD) Battery positive voltage
  4 ± Ground (Ignition SW position LOCK or ACC) No voltage
  4 ± Ground (Ignition SW position ON) Battery positive voltage
  7 ± Ground (Stop Light SW position OFF) No voltage
  7 ± Ground (Stop Light SW position ON) Battery positive voltage
 8 ± Ground (Engine stop)No voltage 
8 ± Ground (Engine running)
 
Battery positive voltage 
INTEGRATION RELAY (Seat Belt Warning)
 
  1 ± Ground (Constant) Battery positive voltage  9 ± Ground (Ignition SW LOCK or ACC) No voltage  9 ± Ground (Ignition SW ON) Battery positive voltage
BE±202± BODY ELECTRICAL SYSTEMSERVICE SPECIFICATIONS

CHECK AND ADJUSTMENT
BRAKE PEDAL CHECK AND
ADJUSTMENT
1. CHECK THAT PEDAL HEIGHT IS CORRECT
Pedal height from dash panel:
154.2±164.2 mm (6.07±6.46 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 NVm (260 kgfVcm, 19 ftVlbf)
(g) Install the stop light switch and turn it until it lightly contacts
the pedal stopper.
(h) Turn the stop light switch back one turn.
(i) Check the clearance (A) between stop light switch and pedal.
Clearance:
0.5±2.4 mm (0.02±0.09 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 released.
(m) After adjusting the pedal height, check the pedal free±play.
HINT: 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 beginning of the second
point of resistance is 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. And if the
clearance is OK, then troubleshoot the brake system.
HINT: The freeplay to the 1st point of resistance is due to the
play between the clevis and pin. It is 1±3 mm (0.04±0.12 in.)
on the pedal. BR±6
± BRAKE SYSTEMCHECK AND ADJUSTMENT

4. CHECK PEDAL RESERVE DISTANCE
Release the parking brake.
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):
w/o TRAC: More than 72 mm (2.83 in.)
w/ TRAC: More than 70 mm (2.76 in.)
If the reserve distance is incorrect, troubleshoot the brake
system.
BRAKE BOOSTER OPERATIONAL TEST
1. OPERATING CHECK
(a) Depress the brake pedal several times with the engine off
and check that there is no change in the pedal reserve
distance.
(b) Depress the brake pedal and start the engine. If the pedal
goes down slightly, operation is normal.
2. AIR TIGHTNESS CHECK
(a) Start the engine and stop it after 1 or 2 minutes. Depress the
brake pedal several times slowly. If the pedal goes down
farthest the 1st time, but gradually rises after the 2nd or 3rd
time, the booster is air tight.
(b) Depress the brake pedal while the engine is running, and
stop the engine with the pedal depressed. If there is no
change in the pedal reserve travel after holding the pedal for
30 seconds, the booster is air tight.
BRAKE SYSTEM BLEEDING
HINT: If any work is done on the brake system or if air in the
brake lines is suspected, bleed the system of air.
NOTICE: Do not let brake fluid remain on painted sur-
faces. Wash it off immediately.
1. REMOVE RESERVOIR CAP
Turn the reservoir cap to the ºopenº side and remove it.
2. FILL RESERVOIR WITH BRAKE FLUID
Fluid:
SAE J1703 or FMVSS NO.116 DOT3
± BRAKE SYSTEMCHECK AND ADJUSTMENTBR±7

TRAC CONTROL SYSTEM BLEEDING
HINT: When repairing the brake master cylinder or TRAC sys-
tem, bleed the air out of the TRAC system.
1. INSPECT BATTERY POSITIVE VOLTAGE
Battery positive voltage:
10±14 V
2. BLEED TRACTION CONTROL SYSTEM
(a) Disconnect the connector from the TRAC pump.
(b) Connect SST to the TRAC pump.
SST 09990±00330
(c) Connect a vinyl tube to the bleeder plug of the TRAC
actuator, then loosen the bleeder plug.
(d) Start the engine.
(e) Connect the SST to the battery. Then wait at least 60
seconds before tightening the bleeder plug with the TRAC
pump still operating.
Torque: 8.3 NVm (85 kgfVcm, 74 in.Vlbf)
(f) After tightening the bleeder plug, keep the TRAC pump
operating for approximately 30 seconds.
(g) Install the cap.
3. CHECK FLUID LEVEL IN RESERVOIR
Fluid:
SAE J1703 or FMVSS NO. 116 DOT3
4. CLEAR DIAGNOSTIC TROUBLE CODES
(See page BR±127)
± BRAKE SYSTEMCHECK AND ADJUSTMENTBR±9

4. INSPECT BRAKE ACTUATOR OPERATION
(a) Start the engine, and run it at idle speed.
(b) Turn the selector switch of the actuator checker to the
ºFRONT RHº position.
(c) Push and hold in the MOTOR switch for a few seconds.
(d) De p re ss th e bra ke pedal and hold it until step (g) is
completed.
(e) Push the POWER SWITCH, and check that the brake pedal
cannot be depressed.
NOTICE: Do not keep the MAIN switch pushed down for
more than 10 seconds.
(f) Re le a se th e switch , an d ch e ck th a t th e pedal can be
depressed.
(g) Push and hold in the MOTOR switch for a few seconds, and
check that the pedal returns.
(h) Release the brake pedal.
(i) Push and hold in the MOTOR switch for a few seconds.
(j) Depress the brake pedal and hold it for about 15 seconds. As
you hold the pedal down, push the MOTOR switch for a few
seconds. Check that the brake pedal does not pulsate.
5. INSPECT FOR OTHER WHEELS
(a) Turn the selector switch to the ºFRONT LHº position.
(b) Repeat (c) to (j) of step 4, checking the actuator operation in
the same way.
(c) Also, inspect the ºREAR RHº and ºREAR LHº positions
following the same procedure.
HINT: When inspecting the ºREAR LHº position, push the
REAR LH switch instead of the POWER SWITCH. This
makes it possible to inspect wherever the selector switch
position indicates. BR±46
± BRAKE SYSTEMANTI±LOCK BRAKE SYSTEM (ABS)

SPEED SENSOR SIGNAL CHECK
1. Turn the ignition switch OFF
2. Using SST, connect terminals Ts and E1 of DLC1.
SST 09843±18020
3. Start the engine.
4. Check that the ABS warning light blinks.
HINT:
wIf the ABS warning light does not blink, inspect the ABS
warning light circuit (See page BR±107).
wIf the ABS warning light is always on, inspect and repair
the IG1 terminal of lateral acceleration sensor.
5. Drive the vehicle faster than 45 km/h (28 mph) for several
seconds.
6. Stop the vehicle.
7. Using SST, connect terminals Tc and E1 of DLC1.
SST 09843±18020
8. Read the number of blinks of the ABS warning light.
HINT: See the list of diagnostic trouble codes shown on the
next page.
If every sensor is normal, a normal code is output (A cycle of
0.25 sec. ON and 0.25 sec. OFF is repeated).
If 2 or more malfunctions are indicated at the same time, the
lowest numbered code will be displayed first.
9. After doing the check, disconnect terminals Ts and E1, Tc and
E1 of DLC1, and turn ignition switch OFF. BR±62
± BRAKE SYSTEMANTI±LOCK BRAKE SYSTEM (ABS)