1991 LEXUS SC300 wheel torque

(b) Install and tighten the bolt.
6. INSTALL FRONT FENDER SPLASH SHIELD
7. INSTALL DISC BRAKE CALIPERInstall the brake caliper to the steering knuckle with the 2
bolts.
Torque: 118 N Vm (1,200 kgf Vcm, 87 ft Vlbf)
8. STABILIZE SUSPENSION
(a) Install the front wheel and lower vehicle.
Torque: 103 N Vm (1,050 kgf Vcm, 76 ft Vlbf)
(b) Bounce the vehicle up and down several times to stabilize the
suspension.
(c) Jack up vehicle and remove the front wheel.
9. TIGHTEN BOLT AND NUT ON LOWER SIDE OF SHOCK ABSORBER
(a) Support the lower arm with a jack.
(b) Tighten the nut to the specified torque.
Torque: 143 N Vm (1,460 kgf Vcm, 106 ft Vlbf)
10. TIGHTEN BOLT AND NUT OF UPPER SUSPENSION ARM
Tighten the bolt and nut to the specified torque.
Torque: 164 N Vm (1,670 kgf Vcm, 121 ft Vlbf)
11. INSTALL FRONT WHEEL AND LOWER VEHICLE
Torque: 103 N Vm (1,050 kgf Vcm, 76 ft Vlbf)
12. CHECK FRONT WHEEL ALIGNMENT
(See page SA±5)
SA±34
±
SUSPENSION AND AXLE FRONT SUSPENSION
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(b) Install and tighten the bolt.
4. INSTALL FRONT FENDER SPLASH SHEILD
5. INSTALL BRAKE CALIPERInstall the brake caliper to the steering knuckle with the 2
bolts.
Torque: 118 N Vm (1,200 kgf Vcm, 87 ft Vlbf)
6. STABILIZE SUSPENSION
(a) Install the front wheel.
Torque: 103 N Vm (1,050 kgf Vcm, 76 ft Vlbf)
(b) Bounce the vehicle up and down several times to stabilize the
suspension.
(c) Jack up the vehicle and remove the front wheel.
7. TIGHTEN BOLT AND NUT OF UPPER SUSPENSION ARM
(a) Support the lower arm with jack.
(b) Torque the bolt and nut the specified torque.
Torque: 164 N Vm (1,670 kgf Vcm, 121 ft Vlbf)
8. INSTALL FRONT WHEEL AND LOWER VEHICLE
Torque: 103 N Vm (1,050 kgf Vcm, 76 ft Vlbf)
9. CHECK FRONT WHEEL ALIGNMENT
(See page SA±5)
±
SUSPENSION AND AXLE FRONT SUSPENSIONSA±39
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3. INSTALL BRAKE CALIPERInstall the brake caliper to the steering cnuckle with the 2
bolts.
Torque: 118 N Vm (1,200 kgf Vcm, 87 ft Vlbf)
4. STABILIZE SUSPENSION
(a) Install the front wheel and jack down the vehicle.
Torque: 103 N Vm (1,050 kgf Vcm, 76 ft Vlbf)
(b) Bounce the vehicle up and down several times to stabilize the
suspension.
5. TORQUE ADJUSTING CAMS AND NUTS
(a) Jack up the vehicle and remove the front wheel.
(b) Support the lower arm with jack.
(c) Align the matchmarks and torque the adjusting cams and nuts with the vehicle weight on the suspension.
Torque: 226 N Vm (2,300 kgf Vcm, 166 ft Vlbf)
6. INSTALL ENGINE UNDER COVER
7. INSTALL FRONT WHEEL
Torque: 103 N Vm (1,050 kgf Vcm, 76 ft Vlbf)
8. CHECK FRONT WHEEL ALIGNMENT
(See page SA±5)
SA±44
±
SUSPENSION AND AXLE FRONT SUSPENSION
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STABILIZER BAR AND LINK REMOVAL
SA0WH±02
1. JACK UP VEHICLE AND REMOVE FRONT WHEELS
2. REMOVE ENGINE UNDER COVER
3. REMOVE BOTH SIDE STABILIZER BAR LINKSRemove the nuts and the stabilizer bar links from the stabiliz-
er bar and the lower suspension arm.
4. REMOVE STABILIZER BAR Remove the 4 bracket mounting bolts and the stabilizer bar
with the cushions and brackets.
5. REMOVE CUSHIONS AND BRACKETS
STABILIZER BAR LINK INSPECTION
SA035±0C
INSPECT BALL JOINT FOR ROTATION CONDITION
(a) As shown, flip the ball joint stud back and forth 5 times, before
installing the nut.
(b) Using a torque wrench, turn the stud continuously one turn every 2±4 seconds and take the torque reading on the 5th
turn.
Torque (turning):
0.05 ± 1.5 N Vm (0.5 ± 15 kgf Vcm, 0.4 ± 13 in. Vlbf)
STABILIZER BAR AND LINK
INSTALLATION
SA0WJ±02
1. INSTALL CUSHIONS AND BRACKETS
(a) Install the cushion so as to touch the line painted on the
stabilizer bar.
HINT: Install the cushion to the inside of the line.
(b) Install the brackets.
SA±46
±
SUSPENSION AND AXLE FRONT SUSPENSION
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2. INSTALL STABILIZER BARInstall the stabilizer bar to the body with the bolts.
Torque: 18 N Vm (180 kgf Vcm, 13 ft Vlbf)
3. INSTALL BOTH SIDE STABILIZER BAR LINKS
Install the stabilizer bar links to the stabilizer bar and the low-
er suspension arm with the nuts.
Torque: 74 N Vm (750 kgf Vcm, 54 ft Vlbf)
4. REMOVE ENGINE UNDER COVER
5. INSTALL FRONT WHEEL AND LOWER VEHICLE
Torque: 103 N Vm (1,050 kgf Vcm, 76 ft Vlbf)
±
SUSPENSION AND AXLE FRONT SUSPENSIONSA±47
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7. STABILIZE SUSPENSION
(a) Install the rear wheel and lower the vehicle.
Torque: 103 NVm (1,050 kgf Vcm, 76 ft Vlbf)
(b) Bounce the vehicle up and down several times to stabilize the
suspension.
8. TORQUE BOLT AND NUTS
(a) Jack up the vehicle and remove the rear wheel.
(b) Support the axle carrier with jack.
(c) Torque the bolt and nuts.
Torque: 184 N Vm (1,880 kgf Vcm, 136 ft Vlbf)
9. INSTALL REAR WHEEL AND LOWER VEHICLE
Torque: 103 N Vm (1,050 kgf Vcm, 76 ft Vlbf)
10. CHECK REAR WHEEL ALIGNMENT
(See page SA±10)
HUB BOLT REPLACEMENT
SA03E±04
1. JACK UP VEHICLE AND REMOVE REAR WHEEL
2. REMOVE REAR BRAKE CALIPER AND BRAKE DISC
(See page SA±52)
3. REMOVE HUB BOLT Using SST, remove the hub bolt.
SST 09628±10011
4. INSTALL HUB BOLT Install washer and nut to the hub bolt, as shown in the illustra-
tion, and install the hub bolt with torquing the nut.
5. INSTALL REAR BRAKE DISC AND BRAKE CALIPER (See page SA±60)
6. INSTALL REAR WHEEL AND LOWER VEHICLE
Torque: 103 N Vm (1,050 kgf Vcm, 76 ft Vlbf)
±
SUSPENSION AND AXLE REAR AXLE HUBSA±61
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REAR DRIVE SHAFT INSTALLATION
SA0S4±02
1. INSTALL DRIVE SHAFT
(a) Insert the outboard joint side of the drive shaft to the axle hub.
NOTICE:
wBe careful not to damage the boots, end cover and speed
sensor rotor of the drive shaft, and oil seal of the axle hub.
w Make sure the outboard joint side of the drive shaft does
not bend too much.
(b) Align the matchmarks on the side gear shaft and drive shaft.
(c) Apply a light coat of engine oil on the threads of the bolt.
(d) Install the 6 hexagon bolts and 2 washers.
(e) Using a 10 mm hexagon wrench, torque the bolts.
Torque: 83 N Vm (850 kgf Vcm, 64 ft Vlbf)
2. INSTALL EXHAUST PIPE
3. INSTALL LOCK NUT, LOCK CAP AND NEW COTTER PIN
Torque: 289 N Vm (2,950 kgf Vcm, 213 ft Vlbf)
4. INSTALL REAR WHEEL AND LOWER VEHICLE
±
SUSPENSION AND AXLE REAR DRIVE SHAFTSA±67
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139
(FOR ABS)
THIS SYSTEM CONTROLS THE RESPECTIVE BRAKE FLUID PRESSURES ACTING ON THE DISC\
BRAKE CYLINDERS OF THE RIGHT
FRONT WHEEL, LEFT FRONT WHEEL AND REAR WHEELS WHEN THE BRAKES ARE APPLIED IN \
A PANIC STOP SO THAT THE
WHEELS DO NOT LOCK. THIS RESULTS IN IMPROVED DIRECTIONALLY STABILITY AND STEERABILITY DURING PANIC BRAKING.
1. INPUT SIGNALS
(1) SPEED SENSOR SIGNALTHE SPEED OF THE WHEELS IS DETECTED AND INPUT TO TERMINALS FL+, FR+, RL+ AND RR+ OF THE ABS AND TRACTION
ECU.
(2) STOP LIGHT SW SIGNAL A SIGNAL IS INPUT TO TERMINAL STP OF THE ABS AND TRACTION ECU WHEN THE BRAKE PEDAL IS OPERATED.
(3) PARKING BRAKE SW SIGNAL A SIGNAL IS INPUT TO TERMINAL PKB OF THE ABS AND TRACTION ECU WHEN THE PARKING BRAKE IS OPERATED.
2. SYSTEM OPERATION
DURING SUDDEN BRAKING, THE ABS AND TRACTION ECU WHICH HAS SIGNALS INPUT FROM E\
ACH SENSOR CONTROLS THE
CURRENT FLOWING TO THE SOLENOID INSIDE THE ACTUATOR AND LETS THE HYDRAULIC PRESSURE ACTING ON EACH WHEEL
CYLINDER ESCAPE TO THE RESERVOIR. THE PUMP INSIDE THE ACTUATOR IS ALSO OPERATING AT THIS TIME AND IT RETURNS
THE BRAKE FLUID FROM THE RESERVOIR TO THE MASTER CYLINDER, THUS PREVENTING LOCKING OF THE VEHICLE WHEELS.
IF THE ECU JUDGES THAT THE HYDRAULIC PRESSURE ACTING ON THE WHEEL CYLINDER IS INSUFFICIENT, THE CURRENT
ACTING ON SOLENOID IS CONTROLLED AND THE HYDRAULIC PRESSURE IS INCREASED, HOLD\
ING OF THE HYDRAULIC
PRESSURE IS ALSO CONTROLLED BY THE COMPUTER, BY THE SAME METHOD AS ABOVE. BY REP\
EATED PRESSURE REDUCTION,
HOLDING AND INCREASE ARE REPEATED TO MAINTAIN VEHICLE STABILITY AND TO IMPROVE STEERABILITY DURING SUDDEN
BRAKING.
(FOR TRACTION CONTROL)
THE TRACTION CONTROL SYSTEM IS A SYSTEM WHEREBY THE ªABS AND TRACTION ECUº AND ªTRACTION ECUº\
CONTROLS THE
ENGINE TORQUE AND THE HYDRAULIC PRESSURE OF THE WHEEL CYLINDER OF THE DRIVING WHEELS IN ORDER TO CONTROL
SPINNING OF THE DRIVING WHEELS WHEN STARTING OFF AND ACCELERATING, AND PROVIDE THE MOST APPROPRIATE DRIVING
FORCE IN RESPONSE TO THE ROAD CONDITIONS FOR VEHICLE STABILITY.
TRACTION CONTROL OPERATION
VEHICLE SPEED SIGNALS FROM THE SPEED SENSOR INSTALLED ON EACH WHEEL ARE INPUT TO THE ABS AND TRACTION ECU.
WHEN THE ACCELERATOR PEDAL IS DEPRESSED WHILE DRIVING ON A SLIPPERY ROAD AND THE DRIVING WHEEL (REAR WHEEL)
SLIPS, IF THE ROTATION OF THE REAR WHEEL EXCEEDS THE ROTATION OF THE FRONT WHEELS FOR A SPECIFIED PERIOD, THE
ECU JUDGES THAT THE REAR WHEEL IS SLIPPING.
WHEN THIS OCCURS, CURRENT FLOWS FROM TRACTION ECU TO SUB THROTTLE ACTUATOR TO CLOSE THE SUB THROTTLE
VALVE. THE THROTTLE VALVE OPENING ANGLE SIGNAL IS OUTPUT FROM TERMINAL VTA OF SUB THROTTLE POSITION SENSOR
TO TERMINAL VTA2 OF ENGINE AND ECT ECU TO KEEP THE ENGINE RPM AT THE MOST SUITABLE LEVEL FOR THE DRIVING
CONDITIONS AND REDUCE SLIP OF THE DRIVING WHEEL. AT THE SAME TIME, OPERATION OF THE ABS AND TRACTION ECU
CAUSE THE TRACTION BRAKE ACTUATORS (ACC CUT, M/C CUT, RESERVOIR CUT SOLENOID) TO TURN ON TO SWITCH THE
HYDRAULIC CIRCUIT TO ªTRACTIONº MODE.
IN THIS CASE, SIGNALS ARE INPUT FROM TERMINAL SRR OF ABS AND TRACTION ECU TO TERMINAL (B)6 OF ABS ACTUATOR, AND
FROM TERMINAL SRL OF ABS AND TRACTION ECU TO TERMINAL (B)1 OF ABS ACTUATOR, CONTROLLING THE REAR WHEEL
SOLENOID IN THE ABS ACTUATOR AND INCREASING THE HYDRAULIC PRESSURE OF THE WHEEL CYLINDER IN ORDER \
TO
PREVENT SLIP.
TO MAINTAIN THE HYDRAULIC PRESSURE OF THE REAR WHEELS, THE REAR WHEEL SOLENOID I\
NSIDE THE ABS ACTUATOR IS
PUT IN ªHOLDº MODE AND KEEPS THE HYDRAULIC PRESSURE TO THE BRAKE CYLINDER CONSTANT.
WHEN THE BRAKE CYLINDER HYDRAULIC PRESSURE IS REDUCED, THE PRESSURE REDU\
CTION MODE REDUCES AND CONTROLS
THE HYDRAULIC PRESSURE.
SYSTEM OUTLINE
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