1995 TOYOTA SUPRA brake fluid

WARNING LIGHTS
 Trouble Parts name (See page)
 
 
 
 
 
Warning lights do not light up
(Except Discharge and Door Open)
 
 
 
 
 
1. Bulb
2. IGN Fuse (BE±6)
3. Ignition Switch (BE±8)
4. Meter Circuit Plate (BE±44)
5. Wire Harness
6. Generator
 
 
 
 
 
 
Brake Warning Light does not light up
 
 
 
 
 
 
1. Bulb
2. Brake Fluid Level Warning Switch (BE±52)
3. Parking Brake Switch (BE±52)
4. Bulb Check Relay
5. Meter Circuit Plate (BE±44)
6. Wire Harness
 
 
 
 
 
Seat Belt Warning Light does not light up
 
 
 
 
 
1. Bulb
2. Seat Belt Buckle Switch (BE±56)
3. Integration Relay (BE±55)
4. Meter Circuit Plate (BE±44)
5. Wire Harness
 
 
 
 
Engine Oil Level Warning Light does not light up
 
 
 
 
1. Bulb
2. Engine Oil Level Switch (BE±51)
3. Meter Circuit Plate (BE±44)
4. Wire Harness
 
 
 
Low Oil Pressure Warning Light does not light up
 
 
 
1. Bulb
2. Low Oil Pressure Warning Switch (BE±51)
3. Meter Circuit Plate (BE±44)
4. Wire Harness
 
 
 
 
 
 
 
Door Open Warning Light does not light up
 
 
 
 
 
 
 
1. Bulb
2. DOME Fuse (BE±5)
3. Door Courtesy Switch (BE±54)
4. Luggage Room Light Switch (BE±28)
5. Integration Relay
6. Meter Circuit Plate (BE±44)
7. Wire Harness
 
 
 
 
Master Warning Light does not light up
 
 
 
 
1. Bulb
2. Telltale Light (BE±48)
3. Meter Circuit Plate (BE±44)
4. Wire Harness
BE±42± BODY ELECTRICAL SYSTEMCOMBINATION METER

BRAKE FLUID LEVEL WARNING
INSPECTION
1. INSPECT SWITCH
(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.
2. INSPECT 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.
PARKING BRAKE WARNING
INSPECTION
1. INSPECT SWITCH
(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.
2. INSPECT 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. BE±52
± BODY ELECTRICAL SYSTEMCOMBINATION METER

RECOMMENDED TOOLS
TOYOTA Electrical Tester Set
Snap Ring Pliers
09082±00050
09905±00013
EQUIPMENT
 
 Torque wrench 
 
 
 Micrometer 
 Brake disc
 
 Dial indicator 
 Brake disc
 
 Vernier calipers 
 Brake disc
LUBRICANT
 Item Capacity Classification 
 Brake fluid
 
 ±
 
 SAEJ1703 or FMVSS No.116, DOT 3
BR±4± BRAKE SYSTEMPREPARATION

BR±17,22,26,31BR±17,22,26,31BR±17,22,26,31BR±17,22,26,31BR±17,22,26,31BR±17,22,26,31BR±17,22,26,31BR±17,22,26,31BR±17,22,26,31BR±17,22,26,31BR±17,22,26,31BR±17,22,26,31BR±35BR±17,22,26,31BR±7BR±35BR±16BR±10BR±39BR±11BR±6
Low pedal or spongy pedal
Brake drag
Brake pull
Hard pedal but brake inefficient
Noise from brakes
See page
Part Name
Trouble
Brake system (fluid leaks)Brake pad (Worn)Brake system (Air in)Piston seal (Worn or damaged)Brake pedal (freeplay minimal)Master cylinder (Faulty)Parking brake wire (Sticking)Parking brake (Lever travel out of Adjustment)Parking brake (Shoe clearance out of adjustment)Piston (Frozen)Pad (Only)Piston (Stuck)Pad (Cracked or distorted)Tension or return spring (Faulty)Booster push rod (Out of adjustment)Sliding pin (Worn)Installation bolt (Loose)Pad support plate (Loose)Booster system (Vacuum leaks)Pad (Glazed)Pad (Dirty)Disc (Scored)Hold±down spring (Damaged)Anti±squeal shim (Damaged)
TROUBLESHOOTING
Use the table below to help you find the cause of the problem. The numbers indicate the priority of the
likely cause of the problem. Check each part in order. If necessary, replace these parts.
± BRAKE SYSTEMTROUBLESHOOTINGBR±5

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

3. BLEED MASTER CYLINDER
HINT: If the master cylinder has been disassembled or if the
reservoir becomes empty, bleed the air from the master cylin-
der.
(a) Disconnect the brake lines from the master cylinder.
(b) Slowly depress the brake pedal and hold it.
(c) Block off the outer holes with your fingers, and release the
brake pedal.
(d) Repeat (b) and (c) 3 or 4 times.
4. BLEED BRAKE LINE
(a) Connect the vinyl tube to the brake caliper.
(b) Depress the brake pedal several times, then loosen the
bleeder plug with the pedal held down.
(c) At the point when fluid stops coming out, tighten the bleeder
plug, then release the brake pedal.
(d) Repeat (b) and (c) until all the air in the fluid has been bled
out.
(e) Repeat the above procedure to bleed the air out of the brake
line for each wheel.
Torque: 11 NVm (110 kgfVcm, 8 ftVlbf)
5. CHECK FLUID LEVEL IN RESERVOIR
Check the fluid level and add fluid if necessary.
Fluid:
SAE J1703 or FMVSS NO.116 DOT3
6. INSTALL RESERVOIR CAP
(a) Align the matchmark on the reservoir cap with the matchmark
on the ºopenº side of reservoir.
(b) Push down on the reservoir cap and turn it clockwise until it
locks.
(c) Check that the matchmark on the reservoir cap is now
aligned with the matchmark on the ºcloseº side of the
reservoir. BR±8
± BRAKE SYSTEMCHECK AND ADJUSTMENT

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

MASTER CYLINDER
MASTER CYLINDER REMOVAL
1. DISCONNECT LEVEL WARNING SWITCH CONNECTOR
2. DRAW OUT FLUID WITH SYRINGE
NOTICE: Do not let brake fluid remain on a painted sur-
face. Wash it off immediately.
3. DISCONNECT BRAKE LINES
Using SST, disconnect the brake lines from the master cylin-
der.
SST 09751±36011
± BRAKE SYSTEMMASTER CYLINDERBR±11