TOYOTA SUPRA 1995 Service Repair Manual

FLUID PRESSURE CHECK
1. CONNECT OIL PRESSURE GAUGE
(a) Disconnect the pressure feed tube from the PS vane pump.
(See page SR±26)
(b) Connect the gauge over a new gasket, as shown below.
NOTICE: Check that the valve of the gauge is in the open
position.
2. BLEED POWER STEERING SYSTEM
(See page SR±9)
3. BOOST FLUID TEMPERATURE
(a) Start the engine and run it at idle.
(b) Turn the steering wheel from lock to lock several times to
boost fluid temperature.
Fluid temperature:
805C (1765F)
4. CHECK FLUID PRESSURE READING WITH VALVE
CLOSED
With the engine idling, close the oil pressure gauge valve and
observe the reading on the gauge.
   Fluid pressure kPa (kgf/cm2, psi)
 Minimum7 355 (75 1 067)

Minimum7,355 (75, 1,067)
NOTICE:
wDo not keep the valve closed for more than 10
seconds.
wDo not let the fluid temperature become too high. SR±10
± STEERINGON±VEHICLE INSPECTION

5. CHECK FLUID PRESSURE READING WITH VALVE
OPENED
(a) With the engine idling, open the valve fully.
(b) Measure the fluid pressure at engine speeds of 1,000 rpm
and 3,000 rpm.
 
 
 
 Fluid pressure kPa (kgf/cm2, psi)
 Difference 490 (5, 71) or less
NOTICE: Do not turn the steering wheel.
6. CHECK FLUID PRESSURE READING WITH STEERING
WHEEL TURNED TO FULL LOCK
With the engine idling and valve fully opened, turn the wheel
to full lock.
   Fluid pressure kPa (kgf/cm2, psi) 
 Minimum
 
 7,355 (75, 1,067)
NOTICE:
wDo not maintain lock position for more than 10
seconds.
wDo not let the fluid temperature become too high.
7. DISCONNECT OIL PRESSURE GAUGE
(a) Disconnect the pressure gauge.
(b) Connect the pressure feed tube.
(See page SR±32)
8. BLEED POWER STEERING SYSTEM
(See page SR±9)
STEERING EFFORT MEASUREMENT
1. CENTER STEERING WHEEL
2. MEASURE STEERING EFFORT
(a) Remove the steering wheel pad.
(See page SR±14)
(b) Start the engine and run it at idle.
(c) Measure the steering effort in both directions.
Maximum steering effort:
6.9 NVm (70 kgfVcm, 61 in.Vlbf)
If steering effort is excessive, repair the power steering unit.
HINT: Be sure to consider the tire type, pressure and contact
surface before making your diagnosis.
(d) Tighten the steering wheel set nut.
Torque: 35 NVm (360 kgfVcm, 26 ftVlbf)
(e) Install the steering wheel pad.
(See page SR±22)
± STEERINGON±VEHICLE INSPECTIONSR±11

TILT STEERING COLUMN
COMPONENTS
SR±12± STEERINGTILT STEERING COLUMN

COMPONENTS
± STEERINGTILT STEERING COLUMNSR±13

STEERING COLUMN REMOVAL
1. REMOVE STEERING WHEEL PAD
(a) Place the front wheels facing straight ahead.
(b) Remove the No.2 and No.3 covers.
(c) Using a torx socket wrench, loosen the 3 torx screws.
HINT: Loosen the 3 screws until the groove along the screw
circumference catches on the screw case.
(d) Pull the pad out from the steering wheel and disconnect the
airbag connector.
NOTICE: When removing the pad, take care not to pull the
airbag wire harness.
CAUTION:
wWhen storing the pad, keep the upper surface of the pad
facing upward.
wNever disassemble the pad.
2. REMOVE STEERING WHEEL
(a) Disconnect the connector.
(b) Remove the wheel set nut.
(c) Place matchmarks on the wheel and main shaft.
(d) Using SST, remove the wheel.
SST 09950±50010 (09951±05010, 09952±05010,
09953±05020, 09954±05020)
3. REMOVE UPPER AND LOWER COLUMN COVERS
Remove 5 screws.
4. REMOVE THESE PARTS:
(See page BO±45)
(a) Console panel upper
(b) Cluster finish panel
(c) Cluster finish panel RH
(d) Cluster finish panel LH
(e) Cluster finish panel center
(f) Finish panel lower
(g) Finish panel lower LH
(h) Register No.2 duct SR±14
± STEERINGTILT STEERING COLUMN

5. REMOVE COMBINATION SWITCH
(a) Remove the 4 screws.
(b) Disconnect the 4 connectors and airbag connector.
6. DISCONNECT INTERMEDIATE SHAFT
(a) Place matchmarks on the intermediate shaft and control
valve shaft.
(b) Loosen the bolt B and remove the bolt A.
7. REMOVE STEERING COLUMN ASSEMBLY
(a) Remove the brake pedal return spring.
(b) Loosen the hole cover clamp.
(c) Remove the 4 nuts.
STEERING COLUMN DISASSEMBLY
NOTICE: When using a vise, do not overtighten it.
1. REMOVE IGNITION KEY CYLINDER ILLUMINATION
2. REMOVE INTERMEDIATE SHAFT
Remove the bolt.
3. REMOVE SLIDING YOKE AND SHAFT THRUST
STOPPER
(a) Remove the bolt.
(b) Shift the stopper.
(c) Place matchmarks on the yoke and main shaft.
4. REMOVE COLUMN LOWER COVER
Loosen the clamp.
5. REMOVE COLUMN UPPER BRACKET
(a) U s i n g a c e n t e r i n g p u n c h , m a r k t h e c e n t e r o f t h e 2
tapered±head bolts.
(b) U s i n g a 4 ± 5 m m ( 0 .16±0.20 in.) drill, drill into the 2
tapered±head bolts.
(c) Using a screw extractor, remove the 2 tapered±head bolts.
(d) Remove the bracket and column upper clamp.
6. REMOVE WIRING HARNESS CLAMP AND COLUMN
PROTECTOR
7. REMOVE COMPRESSION SPRING
(a) Using a torx socket wrench, remove the screw.
(b) Remove the 2 bushings from the spring.
8. REMOVE 3 TENSION SPRINGS
9. REMOVE TURN SIGNAL BRACKET
Remove the 2 bolts.
± STEERINGTILT STEERING COLUMNSR±15

10. REMOVE TILT LEVER RIGHT RETAINER
Remove the nut and E±ring.
11. REMOVE TILT LEVER LEFT RETAINER
(a) Using a hexagon wrench (4 mm) to hold the tilt memory bolt,
remove the nut.
(b) Remove the nut, washer and bolt.
(c) Remove the nut, E±ring and spacer.
(d) Remove the collar.
12. R E M O V E T I LT R I G H T PAW L , T I LT R I G H T PAW L
STOPPER AND TILT LEVER
13. REMOVE TILT LEFT PAWL, TILT LEFT PAWL STOPPER,
TILT SUB LEVER, TILT LEVER ASSEMBLY AND TILT
LEVER LOCK SHAFT
Remove the tilt lever set screw.
14. REMOVE TILT MEMORY BOLT AND SQUARE NUT
Using a hexagon wrench (4 mm), remove the bolt.
15. RE MO V E MAIN SHAFT ASSEMBLY WITH COLUMN
UPPER TUBE
(a) Set SST, the nut (10 mm nominal diameter, 1.25 mm pitch),
plate washer (36 mm outer diameter) and bolt (10 mm
nominal diameter, 1.25 mm pitch, 50 mm length), as shown.
SST 09910±00015 (09911±00011, 09912±00010)
Reference:
Nut 90170±10004
Plate washer 90201±10201
Bolt 91111±51050
(b) Remove the 2 tilt No.2 bolts by using the sliding hammer on
SST.
(c) Remove the shaft assembly with the upper tube from the
column lower tube.
16. REMOVE MAIN SHAFT ASSEMBLY
(a) Using SST, compress the compression spring.
SST 09950±40010 (09957±04010, 09958±04010)
(b) Using snap ring pliers, remove the snap ring.
(c) Remove the main shaft assembly from the upper tube.
(d) Remove the spring, bearing thrust collar and bearing from the
main shaft.
17. RE MO V E MAIN SHAFT CO LLAR AND MAIN SHAFT
BUSHING STOPPER SR±16
± STEERINGTILT STEERING COLUMN

STEERING COLUMN INSPECTION AND
REPLACEMENT
1. INSPECT KEY CYLINDER
Check that the steering lock mechanism operates properly.
2. IF NECESSARY, REPLACE KEY CYLINDER
(a) Place the ignition key at the ACC position.
(b) Push down the stop pin with a screwdriver and pull out the
key cylinder.
(c) Install a new cylinder.
HINT: Make sure the ignition key is at the ACC position.
3. IF NECESSARY, REPLACE UNLOCK WARNING SWITCH
AND IGNITION SWITCH
(a) Remove the 2 screws and warning switch.
(b) Remove the 2 screws and ignition switch.
(c) Install a new ignition switch with the 2 screws.
(d) Install a new warning switch with the 2 screws.
4. A/T:
INSPECT KEY INTER LOCK SOLENOID
(See page AT1±30)
5. A/T:
IF NECESSARY, REPLACE KEY INTERLOCK SOLENOID
(a) Remove the 2 screws and solenoid.
(b) Install a new solenoid with the 2 screws.
6. IF NECESSARY, REPLACE MAIN SHAFT BUSHING
(a) Using a screwdriver, depress the 3 projections on the busing
to release the bushing, then remove the bushing.
NOTICE: If the bushing interior is worn, install a new
bushing.
(b) Align the projections on a new bushing with the holes in the
lower tube. Install the bushing until the projections are firmly
engaged in the holes in the lower tube.
STEERING COLUMN ASSEMBLY
NOTICE: When using a vise, do not overtighten it.
1. APPLY MOLYBDENUM DISULPHIDE LITHIUM BASE
GREASE (See page SR±13)
2. INSTALL MAIN SHAFT BUSHING STOPPER AND MAIN
SHAFT COLLAR
± STEERINGTILT STEERING COLUMNSR±17

3. INSTALL MAIN SHAFT ASSEMBLY
(a) Install the bearing, bearing thrust collar and compression
spring to the shaft assembly.
(b) Install the shaft assembly into the column upper tube.
NOTICE: Do not bend the universal joint of the main shaft
assembly more than 20°.
(c) Using SST, compress the compression spring.
(See page SR±16)
(d) Using snap ring pliers, install a new snap ring.
4. SELECT TILT NO.2 BOLTS
Select the bolt with the hollow±tipped thread end when the
column upper tube mark is 1, and the bolt with the plain
thread end when the mark is 2.
NOTICE: Select the bolt type to match each number
marked in the squares on the upper tube.
5. INSTALL MAIN SHAFT ASSEMBLY WITH COLUMN
UPPER TUBE
(a) Install the shaft assembly with the upper tube into the lower
tube.
(b) Using a vise, press in the 2 tilt No.2 bolts.
6. INSTALL TILT MEMORY BOLT AND SQUARE NUT
(a) Apply sealant to 2 or 3 threads of the bolt.
Sealant:
Part No. 08833±00080, THREE BOND 1344, LOCTITE
242 or equivalent.
(b) Using a hexagon wrench (4 mm), install the shorter side of
the bolt to the nut.
Torque: 6.4 NVm (65 kgfVcm, 56 in.Vlbf)
7. INSTALL TILT LEVER LOCK SHAFT, TILT LEVER
ASSEMBLY, TILT SUB LEVER AND TILT LEVER
8. INSTALL RIGHT AND LEFT TILT PAWLS
(a) Install the right and left pawls to the column upper tube and
temporarily install the bolt and nut.
HINT: Install the pawl pin into the long hole of the tilt lever and
tilt sub lever.
(b) Torque the tilt lever assembly set screw.
Torque: 4.7 NVm (48 kgfVcm, 42 in.Vlbf)
SR±18± STEERINGTILT STEERING COLUMN

9. ENGAGE AND ADJUST RIGHT AND LEFT TILT PAWLS
(a) Engage the left pawl to the center of the ratchet.
(b) Using a spanner (17 mm), while turning the right pawl side
collar, completely engage the right pawl to the ratchet.
NOTICE:
wDo not turn the collar after the right pawl is engaged.
wKeep the bolt and nut temporarily tightened.
10. SELECT RIGHT AND LEFT TILT PAWL STOPPERS
(a) With the tilt pawl and ratchet engaged, install the pawl
stoppers.
(b) Check that the alignment marks on the pawl stopper and pawl
align when the pawl stopper is lightly rotated to the pawl side.
If the alignment marks do not align, select the pawl stoppers
according to the following table.
 
 Right pawl stopper
 
 Left pawl stopper
 
 Dimension ºAº
mm (in.)
 
 1
 
 A
 
 
12.68±12.74
(0.4992±0.5016)
 
 2 
 B 
 
12.61±12.67
(0.4965±0.4988)
 
 
3 
 
C 
 
12.54±12.60
(0.4937±0.4961)
 4 D 12.47±12.53
(0.4909±0.4933)
 
 5
 
 E
 
 12.40±12.46
(0.4882±0.4906)
 
 6
 
 F
 
 12.33±12.39
(0.4854±0.4878)
 
 7 
 G 
 
12.26±12.32
(0.4827±0.4850)
(c) After selecting the pawl stoppers, check that on both sides
the pawl and ratchet are fully engaged.
11. INSTALL RIGHT AND LEFT TILT PAWL STOPPERS
12. INSTALL TILT LEVER LEFT RETAINER
(a) Remove the bolt and nut.
NOTICE: Take care to not turn the collar of the tilt left
pawl.
(b) Install the collar to the tilt memory bolt.
(c) Install the retainer.
(d) Install the bolt, washer and torque the nut.
HINT: Install the bolt so that the groove in the bolt shaft faces
upward.
Torque: 5.9 NVm (60 kgfVcm, 52 in.Vlbf)
± STEERINGTILT STEERING COLUMNSR±19