1995 TOYOTA SUPRA clutch

(See page IN±30)
(1) Connect positive  lead to terminal 5 and negative
lead to terminal 4 of actuator connector.
(2) Move the control plate by hand.
Replace stop light switch.
Repair or replace harness or connector.
Check for open and short in harness and connectors between ECU and stop light switch,
stop light switch and magnet clutch, magnet clutch and body ground. (See page
IN±30).
(1) Remove cruise control actuator.
(2) Disconnect actuator connector.
Move the control plate by hand.
Control plate moves. (Magnet clutch off)
Control plate doesn't move. (Magnet clutch on)
Replace actuator assembly.
Disconnect stop light switch connector.
Check continuity between terminals.
Continuity
Terminals
Switch pin free
Switch position
(Brake pedal depressed)
Switch pin pushes in
(Brake pedal released)
Check actuator magnet clutch.
Check stop light switch.
INSPECTION PROCEDURE
 
 
Proceed to next circuit inspection shown on matrix chart (See page BE±170).
However, when diag. trouble code 12, is displayed, check harness and connector for loose
connection. If connection is normal, check and replace ECU.
BE±174± BODY ELECTRICAL SYSTEMCRUISE CONTROL SYSTEM

Stop Light Switch Circuit
CIRCUIT DESCRIPTION
When the brake is on, battery voltage normally applies through the stop fuse and stop switch to terminal STP±of
the ECU, and the ECU turns the cruise control off.
A fail±safe function is provided so that cancel functions normally, even if there is a malfunction in the stop light
signal circuit.
(1) If the harness connected to terminal STP±has an open, terminal STP±will have battery positive voltage
and the cruise control will be turned off, also SET not occurring.
(2) If the stop fuse is open, terminal STP + becomes approx.
0 V when the brake is turned on, so the ECU performs cancel function normally.
Also, when the brake is on, the magnetic clutch is cut mechanically by the stop light switch, turning the cruise
control off. (See page BE±173 for operation of the magnetic clutch.)
WIRING DIAGRAM
BE±182± BODY ELECTRICAL SYSTEMCRUISE CONTROL SYSTEM

CLUTCH
CL±1

PREPARATION
SST (SPECIAL SERVICE TOOLS)
09023±00100 Union Nut Wrench 10 mm
09301±00110 Clutch Guide Tool
Clutch line
09303±35011 Input Shaft Front Bearing Puller
09304±30012 Input Shaft Front Bearing
Replacer
09333±00013 Clutch Diaphragm Spring Aligner
2JZ±GE Only
RECOMMENDED TOOLS
09082±00050 TOYOTA Electrical Tester Set
09905±00012Snap Ring No. 1 Expander
EQUIPMENT
 
  Calipers
 
 
  Dial indicator  Dial indicator
  To rque wrench  Torque wrench
CL±2± CLUTCHPREPARATION

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.
CL±4CL±6CL±11See page
Parts Name
Trouble
Clutch grabs/chatters
Clutch noisy
Clutch slips
Clutch pedal spongy
Clutch does not disengage
Clutch pedal (freeplay out of adjustment)Pilot bearing (Worn or damaged)Release bearing (Worn, dirty or damaged)Engine mounting (loosen)Release cylinder cup (Damaged)master cylinder cup (Damaged)Clutch line (Air in line)Clutch disc (Dirty or burred)Clutch disc (Oily)Clutch disc (Worn out)Clutch disc torsion rubber (Damaged)Clutch disc (Out of true)Input shaft bearing (Worn or damaged)Clutch disc (Lining broken)Clutch disc (Runout is excessive)Clutch disc (Lack of spline grease)Diaphragm spring (Damaged)Clutch disc (Glazed)Diaphragm spring (Out of tip alignment)Pressure plate (Distortion)Flywheel (Distortion)
CL±17CL±8CL±9CL±11CL±17CL±11CL±17CL±11CL±17CL±11CL±17CL±11CL±17CL±11CL±17CL±11CL±17CL±11CL±17CL±11CL±17CL±15CL±21CL±11CL±17CL±15CL±20CL±11CL±17
± CLUTCHTROUBLESHOOTINGCL±3

CLUTCH PEDAL
CLUTCH PEDAL CHECK AND ADJUSTMENT
1. CHECK PEDAL HEIGHT
Pedal height from asphalt sheet:
146.2±156.2 mm (5.76±6.15 in.)
2. IF NECESSARY, ADJUST PEDAL HEIGHT
Loosen the lock nut and clutch switch until the height is cor-
rect. Tighten the lock nut.
HINT: Before rotating the clutch switch for pedal height ad-
justment, disconnect the clutch switch connector.
3. CHECK PEDAL FREEPLAY AND PUSH ROD PLAY
Push in on the pedal until the beginning of clutch resistance
is felt.
Pedal freeplay: 5.0±15.0 mm (0.197±0.591 in.)
Gently push on the pedal until the resistance begins to in-
crease a little.
Push rod play at pedal top:
1.0±5.0 mm (0.039±0.197 in.)
4. IF NECESSARY, ADJUST PEDAL FREEPLAY AND PUSH
ROD PLAY
(a) Loosen the lock nut and turn the push rod until the freeplay
and push rod play are correct.
(b) Tighten the lock nut.
(c) After adjusting the pedal freeplay, check the pedal height.
5. INSPECT FULL PEDAL STROKE
Full pedal stroke: 132.0±138.0 mm (5.20±5.43 in.)
6. INSPECT CLUTCH RELEASE POINT
(a) Pull the parking brake lever and install wheel stopper.
(b) Start the engine and idle the engine.
(c) Without depressing the clutch pedal, slowly shift the shift
lever into position until the gears contact.
(d) Gradually depress the clutch pedal and measure the stroke
distance from the point the gear noise stops (release point)
up to the full stroke end position.
Standard distance: 25 mm (0.98 in.) or more
(From pedal stroke end position to release point)
If the distance is not as specified, do the following operation.
wInspect pedal height.
wInspect push rod play and pedal freeplay.
wBleed the clutch line.
wInspect the clutch cover and disc. CL±4
± CLUTCHCLUTCH PEDAL

7. CHECK CLUTCH START SYSTEM
(a) Check that the engine does not start when the clutch pedal
is released.
(b) Check that the engine starts when the clutch pedal is fully
depressed.
If necessary, adjust or replace the clutch start switch.
8. INSPECT CONTINUITY OF CLUTCH START SWITCH
(a) Check that there is continuity between terminals when the
switch is ON (pushed).
(b) Check that there is no continuity between terminals when the
switch is OFF (free).
If continuity is not as specified, replace the switch.
± CLUTCHCLUTCH PEDALCL±5

CLUTCH MASTER CYLINDER
COMPONENTS
MASTER CYLINDER REMOVAL
Installation is in the reverse order of removal.
1. DRAIN OUT FLUID WITH SYRINGE
INSTALLATION HINT: After installation, adjust the clutch
pedal and bleed the clutch system.
2. DISCONNECT CLUTCH LINE UNION
Using SST, disconnect the union nut.
SST 09023±00100
Torque: 15 NVm (155 kgfVcm, 11 ftVlbf)
3. REMOVE CLIP AND PIN
4. REMOVE 2 MOUNTING NUTS AND PULL OUT MASTER
CYLINDER
Torque: 12 NVm (125 kgfVcm, 9 ftVlbf)
CL±6± CLUTCHCLUTCH MASTER CYLINDER