1991 LEXUS SC300 clock

3. BLEED MASTER CYLINDERHINT: 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 N Vm (110 kgf Vcm, 8 ft Vlbf)
5. CHECK FLUID LEVEL IN RESERVOIR
Check the fluid level and add fluid if necessary.
Fluid:
SAE J1703 or FMVSS NO.116DOT3
6. INSTALL RESERVOIR CAP
(a) Align the matchmark on the reservoir cap with the matchmark
on the ªopenº 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 ªcloseº side of the
reservoir.
±
BRAKE SYSTEM CHECK AND ADJUSTMENTBR±9
WhereEverybodyKnowsYourName

MASTER CYLINDER ASSEMBLY
BR0EH±05
1. APPLY LITHIUM SOAP BASE GLYCOL GREASE TORUBBER PARTS INDICATED BY ARROWS
2. INSTALL PISTONS
NOTICE: Be careful not to damage the rubber lips on the pis-
tons.
(a) Insert the 2 pistons straight in, not at an angle.
NOTICE: If inserted at an angle, there is a possibility that the
cylinder bore could be damaged.
(b) Push in the piston with a screwdriver and install the snap ring
with snap ring pliers.
HINT: Tape the screwdriver tip before use.
3. w/ TRAC: INSTALL NO. 1 PISTON STOPPER BOLT
Using a screwdriver, push the piston in all the way and install
the No. 1 piston stopper bolt over a new gasket.
Torque: 10 N Vm (100 kgf Vcm, 7 ft Vlbf)
4. INSTALL NO. 2 PISTON STOPPER BOLT
Using a screwdriver, push the piston in all the way and install
the No. 2 piston stopper bolt over a new gasket.
Torque: 10 N Vm (100 kgf Vcm, 7 ft Vlbf)
5. INSTALL 2 GROMMETS
6. INSTALL RESERVOIR
(a) Install the strainer to the reservoir.
(b) Push the reservoir onto the cylinder.
(c) Install the set screw while pushing on the reservoir.
Torque: 1.7 N Vm (17.5 kgf Vcm, 15.2 in. Vlbf)
7. INSTALL RESERVOIR CAP
(a) Align the matchmark on the reservoir cap with the matchmark
on the ªopenº 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 ªcloseº side of the
reservoir.
BR±16
±
BRAKE SYSTEM MASTER CYLINDER
WhereEverybodyKnowsYourName

ON±VEHICLE INSPECTION
1. INSPECT BATTERY SPECIFIC GRAVITY ANDELECTROLYTE LEVEL
(a) Check the specific gravity of each cell.
Standard specific gravity:
1.27±1.29 when fully charged at 20 5C (68 5F)
If gravity is less than specification, charge the battery.
(b) Check the electrolyte quantity of each cell.
If insufficient, refill with distilled (or purified) water.
HINT: Check the indicator as shown in the illustration.
2. CHECK BATTERY TERMINALS, FUSIBLE LINKS AND FUSES
(a) Check that the battery terminals are not loose orcorroded.
(b) Check the fusible links and fuses for continuity.
H±fuse: ALT 150A AM1 100A
AM2 30A
M±fuse: IG SW 40A
Fuse: IGN 7.5A ENGINE 7.5A
INJ 30A
3. INSPECT DRIVE BELTHINT: A belt tensioner is used, so checking the belt tension
is not necessary.
(a) Visually check the drive belt for excessive wear, frayedcords, etc.
If necessary, replace the drive belt.
HINT:
w Cracks on rib side of a drive belt are considered
acceptable. If the drive belt has chunks missing from the
ribs, it should be replaced.
w The drive belt tension can be released by turning the
belt tensioner counterclockwise. The pulley bolt for the
belt tensioner has a left±hand thread.
±
CHARGING SYSTEM On±Vehicle InspectionCH±5
WhereEverybodyKnowsYourName

ALTERNATOR
COMPONENTS FOR REMOVAL AND
INSTALLATION
REMOVAL OF ALTERNATOR
1. DISCONNECT CABLE FROM NEGATIVE TERMINAL OFBATTERY
CAUTION: Work must be started after approx. 20 se-
conds or longer from the time the ignition switch is
turned to the ºLOCKº position and the negative (±) termi-
nal cable is disconnected from the battery.
2. REMOVE ENGINE UNDER COVER
3. REMOVE DRIVE BELT
Loosen the belt tension by turning the drive belt tensioner
counterclockwise, and remove the drive belt.
HINT: The pulley bolt for the belt tensioner has a left±hand
thread.
±
CHARGING SYSTEM AlternatorCH±9
WhereEverybodyKnowsYourName

(c) Remove the seal plate.
4. REMOVE PULLEY (a) Hold SST (A) with a torque wrench, and tighten SST (B)clockwise to the specified torque.
SST 09820±63010
Torque: 39 N Vm (400 kgf Vcm, 29 ft Vlbf)
(b) Check that SST (A) is secured to the rotor shaft.
(c) As shown in the illustration, mount SST (C) in a vise, and
install the alternator to SST (C).
(d) To loosen the pulley nut, turn SST (A) in the direction
shown in the illustration.
NOTICE: To prevent damage to the rotor shaft, do not
loosen the pulley nut more than one±half of a turn.
(e) Remove the alternator from SST (C).
(f) Turn SST (B) and remove SST (A and B).
(g) Remove the pulley nut and pulley.
5. REMOVE RECTIFIER END FRAME (a) Remove the four mounting nuts.
(b) Using SST, remove the rectifier end frame.
SST 09286±46011
CH±12
±
CHARGING SYSTEM Alternator
WhereEverybodyKnowsYourName

4. INSTALL PULLEY(a) Install the pulley to the rotor shaft by tightening thepulley nut by hand.
(b) Hold SST (A) with a torque wrench, and tighten SST (B)
clockwise to the specified torque.
SST 09820±63010
Torque: 39 N Vm (400 kgf Vcm, 29 ft Vlbf)
(c) Check that SST (A) is secured to the pulley shaft.
(d) As shown in the illustration, mount SST (C) in a vise, and
install the alternator to SST (C).
(e) To torque the pulley nut, turn SST (A) in the direction shown in the illustration.
Torque: 110 N Vm (1,125 kgf Vcm, 81 ft Vlbf)
(f) Remove the alternator from SST (C).
(g) Turn SST (B) and remove SST (A and B).
5. INSTALL RECTIFIER HOLDER (a) Place the seal plate on the rectifier end frame.
(b) Install the four rubber insulators on the lead wires.
(c) Install the rectifier holder with the four screws.
CH±18
±
CHARGING SYSTEM Alternator
WhereEverybodyKnowsYourName

INSTALLATION OF ALTERNATOR
(See Components on page CH±9)
1. INSTALL ALTERNATOR (a) Install the alternator and A/T oil cooler bracket with the
bolt and nut.
Torque: 37 N Vm (380 kgf Vcm, 27 ft Vlbf)
(b) Connect the alternator connector.
(c) Connect the alternator wire with the nut and cap.
2. INSTALL DRIVE BELT Install the drive belt by turning the drive belt tensioner coun-
terclockwise.
HINT: The pulley bolt for the belt tensioner has a left±hand
thread.
3. CONNECT CABLE TO NEGATIVE TERMINAL OF BATTERY
4. PERFORM ON±VEHICLE INSPECTION (See steps 6 to 8 on pages CH±6 to 8)
5. INSTALL ENGINE UNDER COVER
CH±20
±
CHARGING SYSTEM Alternator
WhereEverybodyKnowsYourName

Steering Wheel Pad (Airbag and Inflator)
Junction Block No. 1 Center Airbag
Front Airbag Sensor
Front Airbag Sensor
Warning Light Spiral Cable (in Combination Switch)
HANDLING PRECAUTIONS ON RELATED COMPONENTS
1. SRS AIRBAG
Locations of Airbag Components
This vehicle has an SRS AIRBAG (referred to as the airbag in the remain\
der of this manual).
When handling airbag components (removal, installation or inspection, e\
tc.), always follow the directions
given in the repair manual for the relevant model year to prevent the oc\
currence of accidents and airbag
malfunction.
Also take the following precautions when repairing the body:

Work must be started after 20 seconds or longer from the time the ignitio\
n switch is set to the LOCK
position and the negative (-) terminal cable is disconnected from the \
battery.
(The airbag system is equipped with a back-up power source so that if w\
ork is started within 20 seconds
of disconnecting the negative (-) terminal cable of the battery, the airbag may be deployed.)
When the negative (-) terminal cable is disconnected from the battery, memory of the clock and audio
systems will be cancelled. So before starting work, make a record of the\
contents memorized by each
memory system. Then when work is finished, reset the clock and audio sys\
tems as before.
When the vehicle has tilt and telescopic steering, power seat, and outsi\
de rear view mirror, which are all
equipped with memory function, it is not possible to make a record of th\
e memory contents.
So when the operation is finished, it will be necessary to explain this \
fact to the customer, and request
the customer to adjust the features and reset the memory.
To avoid erasing the memory of each memory system, never use back-up powe\
r supply from outside
the vehicle.

When using electric welding, first disconnect the airbag connector (yel\
low color and 2 pins) under the
steering column near the combination switch connector before starting wo\
rk.
Sensor Assembly
INTRODUCTIONIN-6
WhereEverybodyKnowsYourName