2003 Lexus SC430 Service & Repair Manual
What's Included?
Lifetime Access
Fast Download Speeds
Offline Viewing
Access Contents & Bookmarks
Full Search Facility
Print one or all pages of your manual
2003 SPECIFICATIONS INDEX
SC 430
AIR CONDITIONING
AUTOMATIC SYSTEM
Service Specifications
AIR CONDITIONING SPECIFICATIONS
Torque Specifications
AIR CONDITIONING TORQUE SPECIFICATIONS
AXLE NUT/HUB NUT
FRONT
Application Specification
Compressor Type 7SBU16
Compressor Belt Tension
(1)
Compressor Oil Capacity
(2)
4.1 ozs.
Refrigerant (R-134a) Capacity 19.4-22.9 ozs.
System Operating Pressures
(3)
High Side 199-213 psi (14-15 kg/cm
2
)
Low Side 21-36 psi (1.5-2.5 kg/cm
2
)
(1)
Belt tension is maintained automatically.
(2)
Use Denso/ND-OIL 8 refrigerant.
(3)
Specification is with ambient temperature at 86-95°F (30-35°C) and engine speed at 2000 RPM.
Application Ft. Lbs. (N.m)
A/C Compressor-To-Engine Block 36 (49)
Compressor Clutch Center Bolt 13 (18)
Instrument Panel & Braces 15 (20)
Steering Column Support Nuts 19 (26)
Steering Column Pinch Bolts 26 (35)
Steering Wheel Nut 37 (50)
INCH Lbs. (N.m)
Air Bag Module Torx Screw 78 (8.8)
Compressor Discharge Tube 89 (10)
Compressor Suction Tube 89 (10)
Condenser Fittings 89 (10)
Expansion Valve-To-Suction Tube 89 (10)
Modulator (Receiver-Drier) Cap 109 (12)
2003 Lexus SC 430
2003 SPECIFICATIONS INDEX SC 430
2003 Lexus SC 430
2003 SPECIFICATIONS INDEX SC 430
Wednesday, July 29, 2015 2:31:51 PM Page 1 © 2011 Mitchell Repair Information Company, LLC. Wednesday, July 29, 2015 2:31:55 PM Page 1 © 2011 Mitchell Repair Information Company, LLC.
147 Ft.lbs (199 N.m)
(Axle Hub Lock Nut)
REAR
215 Ft.lbs (290 N.m)
(Axle Shaft Lock Nut)
BATTERY
Service Specifications
Information not available from manufacturer.
BRAKES
BLEEDING SEQUENCE
1. If master cylinder is rebuilt or reservoir is empty, bleed master cylinder first. Bleed wheels in
sequence. Start on wheel with longest hydraulic line, and work toward wheel with shortest hydraulic
line.
2. Raise and support vehicle. Ensure brake fluid reservoir is at least half full during bleeding procedure.
Connect one end of transparent vinyl tube to bleed screw. Submerge other end of tube in a container
half filled with clean brake fluid.
3. Have an assistant depress brake pedal several times and hold in depressed position. Loosen bleeder
screw, and drain fluid into container. Tighten bleeder screw.
4. Refill brake fluid reservoir as necessary. Repeat step 3 until air is no longer discharged. Ensure
bleeder screw is tightened to specification. See TORQUE SPECIFICATIONS . Ensure fluid leakage
is not present. Add fluid to reservoir. Repeat procedure for remaining wheels.
DISC BRAKES
Service Specifications
DISC BRAKE SPECIFICATIONS
CAUTION: DO NOT allow reservoir to run dry during brake bleeding procedure.
Use only clean brake fluid. Ensure no dirt or other foreign matter
contaminates brake fluid. DO NOT mix different brands of brake fluid,
as they may not be compatible. DO NOT spill brake fluid on vehicle, as
it may damage paint. If brake fluid contacts paint, immediately wash
with water.
NOTE: Ensure brake pedal remains depressed until bleeder screw is tightened.
Application In. (mm)
Brake Pad Thickness
2003 Lexus SC 430
2003 SPECIFICATIONS INDEX SC 430
Wednesday, July 29, 2015 2:31:51 PM Page 2 © 2011 Mitchell Repair Information Company, LLC.
Torque Specifications
DISC BRAKE TORQUE SPECIFICATIONS
Front
Standard .433 (11)
Minimum .039 (1.0)
Rear
Standard .413 (10.5)
Minimum .039 (1.0)
Front Disc
Standard Thickness 1.260 (32)
Minimum Thickness 1.181 (30)
Disc Runout
(1)
.002 (.05)
Rear Disc
Standard Thickness .472 (12)
Minimum Thickness .413 (10.5)
Disc Runout
(1)
.002 (.05)
Rear Disc Parking Brake Drum
(2)
Brake Shoe-To-Lever Clearance Less Than .0138 (.35)
Drum Diameter 7.48 (190)
Maximum Diameter 7.52 (191)
Parking Brake Shoe Lining Thickness
(3)
Standard Thickness .098 (2.5)
Minimum Thickness .039 (1.0)
(1)
Measured .39 in. (10 mm) from outer edge of rotor.
(2)
This is the drum for the parking brake on the inside of the rear disc.
(3)
This is brake lining for the parking brake on the inside of the rear disc.
Application Ft. Lbs. (N.m)
Accumulator To Brake Booster Pump 36 (54)
Brake Actuator Tube No. 1 11 (15)
Brake Booster Clevis Lock Nut 19 (26)
Brake Union Bolt 22 (30)
Disc Brake Front Caliper Installation Bolts 25 (34)
Flexible Hose-To-Brake Caliper 22 (30)
Front Brake Caliper Mounting 87 (118)
Front Brake Caliper-To-Front Brake Caliper Mounting 25 (34)
Master Cylinder Union Bolts 23 (32)
Push Rod Lock Nut 19 (26)
Wheel Lug Nuts 76 (103)
Wheel Ornament Bolts 15 (20)
INCH Lbs. (N.m)
Bleeder Screw 97 (11)
2003 Lexus SC 430
2003 SPECIFICATIONS INDEX SC 430
Wednesday, July 29, 2015 2:31:51 PM Page 3 © 2011 Mitchell Repair Information Company, LLC.
CHARGING SYSTEM
GENERATOR
Service Specifications
GENERATOR SPECIFICATIONS
GENERATOR OUTPUT SPECIFICATIONS
(1)
Torque Specifications
GENERATOR TORQUE SPECIFICATIONS
DRIVE BELTS
Brake Actuator Bracket No. 1 75 (8.5)
Brake Actuator Bracket No. 3 69 (7.8)
Brake Booster Pump Bracket No. 1 69 (7.8)
Brake Booster Pump Bracket No. 2 69 (7.8)
Brake Booster Pump Bracket No. 3 106 (12)
Brake Booster Pump Bracket Bolt 106 (12)
Brake Control Wire
Master Cylinder Side 15 (1.7)
Booster Pump Side 26 (2.9)
Brake Lines To Body 43 (4.9)
Front Brake Line To Flexible Hose 133 (15)
Brake Lines To Master Cylinder 133 (15)
Master Cylinder Assembly Nuts 133 (15)
Master Cylinder Reservoir Sub-Assembly 15 (2)
Application Specification
Rotor Coil resistance @ 68°F (20°C) 2.1-2.5 Ohms
Slip Ring Diameter
Standard .559-0.567 in. (14.2-14.4 mm)
Minimum .504 in. (12.8 mm)
Brush Exposed Length
Standard .374-.453 in. (9.5-11.5 mm)
Minimum .059 in. (1.5 mm)
Application Amps Volts
SC430 10 Or Less 13.2-14.8
(1)
Measured at 77°F (25°C) and 2000 RPM.
Application Ft. Lbs. (N.m)
Generator Mounting Bolt/Nut 29 (39)
Generator Pulley-To-Rotor Nut 81 (111)
Power Steering Pump Pulley 32 (43)
2003 Lexus SC 430
2003 SPECIFICATIONS INDEX SC 430
Wednesday, July 29, 2015 2:31:51 PM Page 4 © 2011 Mitchell Repair Information Company, LLC.
ADJUSTMENT
Specifications & Procedures
Automatic belt tension is used to provide proper tension on serpentine drive belt. No adjustment is
necessary.
DRIVE BELT ROUTING
Routing Illustrations
For drive belt routing, see Fig. 1 .
Fig. 1: Serpentine Belt Routing & Checking Drive Belt Tension
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
2003 Lexus SC 430
2003 SPECIFICATIONS INDEX SC 430
Wednesday, July 29, 2015 2:31:51 PM Page 5 © 2011 Mitchell Repair Information Company, LLC.
ENGINE MECHANICAL
COMPRESSION
COMPRESSION SPECIFICATIONS (3UZ-FE)
OIL PRESSURE
OIL PRESSURE SPECIFICATIONS (3UZ-FE)
OVERHAUL SPECIFICATIONS
For Engine Overhaul Specifications, see SERVICE DATA in 4.3L V8 article in ENGINES.
TORQUE SPECIFICATIONS
For Engine Torque Specifications, see TORQUE SPECIFICATION in 4.3L V8 article in ENGINES.
ENGINE COOLING
SERVICE
Specifications
COOLING SYSTEM SPECIFICATIONS
THERMOSTAT R & I
Application Specification
Normal Compression Pressure
178 psi (12.5 kg/cm
2
)
Minimum Compression Pressure
142 psi (10.0 kg/cm
2
)
Maximum Variation Between Cylinders
14 psi (1.0 kg/cm
2
)
Application Specifications
At Normal Operating Temperature
At Idle Speed
4.3 psi (0.3 kg/cm
2
) or more
At 3,000 RPM
43-85 psi (3.0-6.0 kg/cm
2
)
Application Specification
Coolant Replacement Interval 30,000 Miles Or 24 Months
Coolant Capacity 10.46 Qts. (9.9L)
Pressure Cap Standard Opening Pressure
(2)
13.5-17.8 psi (.95-1.25
kg/cm
2
)
Thermostat Opening Temperature
(3)
176-183°F (80-84°C)
(1)
The Toyota Super Long Life Coolant (SLLC) has been adopted.
(2)
Minimum opening pressure is 11.4 psi (.8 kg/cm
2
).
(3)
Thermostat valve lift should be .39 in. (10 mm) or more at 203°F (95°C).
2003 Lexus SC 430
2003 SPECIFICATIONS INDEX SC 430
Wednesday, July 29, 2015 2:31:51 PM Page 6 © 2011 Mitchell Repair Information Company, LLC.
For removal and installation, see THERMOSTAT .
WATER PUMP R & I
For removal and installation, see WATER PUMP .
FLUID SPECIFICATIONS
See FLUIDS under MAINTENANCE tab.
FLYWHEEL/FLEX PLATE TORQUE
TORQUE SPECIFICATION (3UZ-FE)
FUEL SYSTEM
FUEL PRESSURE
Specifications
FUEL PUMP PERFORMANCE
Testing Procedure
For checking fuel pressure using a typical EFI fuel pressure gauge, see GS430, LS430 & SC430 .
FUEL FILTER LOCATION
FUEL FILTER (IN - TANK)
IGNITION SYSTEM
FIRING ORDER
Specifications
See FIRING ORDER & CYLINDER IDENTIFICATION .
HIGH TENSION WIRES
Part Tightened N.m kgf.cm Ft.lbf
Drive Plate-to-Crankshaft
Step 1 49 500 36
Step 2 An additional 90 degree turn
Application
(1)
Pressure psi (kg/cm
2
)
No Vacuum 44-50 (3.1-3.5)
(1)
Check fuel pressure with engine off. Using scan tool connected to DLC3 under driver's side of
dashboard, turn ignition on to activate fuel pump. If scan tool is not available, connect battery
voltage to terminals on electric fuel pump.
2003 Lexus SC 430
2003 SPECIFICATIONS INDEX SC 430
Wednesday, July 29, 2015 2:31:51 PM Page 7 © 2011 Mitchell Repair Information Company, LLC.
Resistance Specifications
Distributorless Ignition System (DIS) is used with ignition coil mounted on the spark plug. No high tension
wires are used.
Wire Routing
Distributorless Ignition System (DIS) is used with ignition coil mounted on the spark plug. No high tension
wires are used.
IGNITION COIL
Ignition coil resistance is not available from manufacturer.
IGNITION TIMING
IGNITION TIMING (Degrees BTDC @ Idle)
(1)
SPARK PLUGS
All Specifications
SPARK PLUG SPECIFICATIONS
STARTING SYSTEM
STARTER
Service Specifications
STARTER SPECIFICATIONS
Application Base Timing ECM Controlled Timing
SC 430
(2)
8-12
(3)
(1)
Check with engine at normal operating temperature, transaxle/transmission in Neutral, parking
brake applied, and A/C and all accessories off.
(2)
With Jumper Wire (SST 09843-18020 or SST 09843-18040) installed between terminals TC and
CG on data link connector No. 3.
(3)
Information not available from manufacturer.
Type & Part No. Gap In. (mm) Torque Ft. Lbs. (N.m)
Denso SK20R11
.039-.043 (1.0-1.1)
(1)
13 (18)
NGK IFR6A11
.039-.043 (1.0-1.1)
(1)
13 (18)
(1)
Engine is equipped with iridium-tipped spark plugs. DO NOT attempt to adjust spark plug gap.
Application Specification
Brush Length
Standard .59 in. (15 mm)
Minimum .35 in. (9 mm)
2003 Lexus SC 430
2003 SPECIFICATIONS INDEX SC 430
Wednesday, July 29, 2015 2:31:51 PM Page 8 © 2011 Mitchell Repair Information Company, LLC.
Torque Specifications
TORQUE SPECIFICATIONS
WHEEL ALIGNMENT
SERVICE SPECIFICATIONS
For FRONT WHEEL ALIGNMENT Specifications, see SERVICE DATA .
For REAR WHEEL ALIGNMENT Specifications, see SERVICE DATA .
TORQUE SPECIFICATIONS
For FRONT SUSPENSION, see TORQUE SPECIFICATIONS .
For REAR SUSPENSION, see TORQUE SPECIFICATION .
WHEEL & TIRE
WHEEL LUG NUT TORQUE
76 Ft.lbs (103 N.m)
Brush Spring Tension
Standard 4.9-6.2 Lbs. (2.2-2.8 kg)
Minimum 2.9 Lbs. (1.3 kg)
Commutator Diameter
Standard 1.38 in. (35 mm)
Minimum 1.34 in. (34 mm)
Commutator Undercut (Minimum)
(1)
.008 in. (.2 mm)
Commutator Runout (Maximum) .002 in. (.05 mm)
(1)
Depth of groove between each segment of commutator.
Application Ft. Lbs. (N.m)
Coolant By-Pass Pipe Bolt 13 (18)
Fuel Inlet-To-Fuel Main Tube 22 (30)
Intake Manifold Bolt/Nut 13 (18)
Rear Coolant By-Pass Joint Nut 13 (18)
Starter Bolt 27 (37)
Terminal Nut 13 (18)
Throttle Body Bolt/Nut 13 (18)
INCH Lbs. (N.m)
End Cover-To-Brush Holder Screw 34 (3.8)
End Cover-To-Magnetic Switch Housing Screw 32 (3.6)
Starter Housing-To-Magnetic Switch Screw 82 (9.3)
Starter Trough Bolt 82 (9.3)
2003 Lexus SC 430
2003 SPECIFICATIONS INDEX SC 430
Wednesday, July 29, 2015 2:31:51 PM Page 9 © 2011 Mitchell Repair Information Company, LLC.
You're Reading a Preview
What's Included?
Lifetime Access
Fast Download Speeds
Offline Viewing
Access Contents & Bookmarks
Full Search Facility
Print one or all pages of your manual
$36.99
Viewed 24 Times Today
Secure transaction
What's Included?
Lifetime Access
Fast Download Speeds
Offline Viewing
Access Contents & Bookmarks
Full Search Facility
Print one or all pages of your manual
$36.99
If you are in need of a repair manual for your 2003 Lexus SC430, look no further. Our accessible repair manual provides comprehensive coverage for the Lexus SC430, making it an ideal resource for both professional mechanics and DIY enthusiasts.
Gone are the days of purchasing traditional service manuals in book format at a higher cost. Our repair manual offers the same valuable information in a more affordable and convenient digital format.
Whether you are tackling brake repairs, replacing suspension components, addressing engine issues, or performing standard maintenance, this repair manual for the Lexus SC430 has you covered. It contains all the necessary service information for brakes, engine, suspension, steering, drivetrain, electrical systems, heating, air conditioning, and more.
By utilizing this 2003 Lexus SC430 repair manual , you can save a significant amount of money on vehicle maintenance. Professional mechanics often charge high fees, making a DIY approach with the assistance of this manual a cost-effective alternative.
Our repair manual is designed for ease of use and is compatible with Windows, Mac computers, smartphones, and tablets, ensuring accessibility across various devices.
