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2003 Toyota Sienna CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Toyota REPAIR SHOPS DON'T WANT YOU TO KNOW
Learn how to repair a car or truck, install or remove parts, wire an engine, reset warning lights, replace fuel filter, fix auto body and more. Get Automotix DIY!Select Section
- Component Locations
- Wiring Diagrams
- Technical Service Bulletins
- Specifications
- A/C & Heater Service
- Brake Service
- Fuel Filter Replacement
- Driveline, U-Joint & CV Axles Replacement
- Tire Pressure Monitoring System
- Starter & Alternator Replacement
- Maintenance Lamp Reset
- Radiator & Hose Replacement
- Serpentine Belt Service
Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 2003 Toyota Sienna car and truck
repair procedures including Toyota engine diagrams, wiring diagrams, repair work estimating measures, technical service bulletins, auto body work
guidance, starter & alternator replacement procedures, serpentine belt replacement procedures, radiator & hose replacement procedures, tune-up &
drivability specifications, quick lube illustrations, preventive maintenance guide, engine light reset instructions, parts removal and install
procedures, fuel filter replacement directions, component location diagrams, air filter locations & replacement instructions, a/c
system specifications, and general auto service procedures. You don't have to be a car mechanic or technician to know how to fix
your Toyota Sienna automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR 2003 Toyota Sienna AUTOMOBILES
Toyota -> Manual Air Conditioning & Heater System Diagnosis & Testing -> Component Tests -> A/C & Heater Control Panel -> A/C Amplifier -> A/C Control -> A/C Control Assembly -> A/C Switch -> Air Inlet Servomotor -> Avalon -> Blower Control Switch -> Blower Motor -> Blower Motor Relay -> Blower Resistor -> Blower Switch -> Camry -> Camry Solara -> Celica -> Compressor -> Compressor Lock Sensor -> Compressor Lock Sensor Resistor -> Cooling Fan Control -> Corolla -> Corolla Matrix -> Echo -> Expansion Valve -> Front -> Front Heater Relay -> Heater Blower Motor Relay -> Heater Main Relay -> Heater Sub Relay -> Highlander -> Magnet Clutch Relay -> Magnetic Clutch -> Magnetic Clutch Control -> Magnetic Clutch Relay -> Mode Control Switch -> MR2 -> Pressure Switch -> RAV 4 -> Rear Blower Switch -> Rear Cooler -> Rear Heater -> Rear Heater HI Relay -> Rear Heater Relay -> Rear LO, Rear M1, Rear M2 & Rear Relays -> Sienna -> Tacoma -> Tundra
Vehicle: 2003 Toyota Sienna 3.0 V6 GAS
Avalon
A/C Amplifier
- Turn ignition On.
- Move temperature control lever to MAX COOL.
- Turn blower control switch to HI.
- Inspect resistance and voltage values between connector terminals, Fig. . If resistance and voltage reading are within specifications, proceed to next step. If resistance or voltage readings are not as specified, locate and repair faulty wiring. If wiring is satisfactory, replace amplifier.
- Inspect amplifier operation as illustrated in Fig. . If amplifier operates as specified, amplifier is satisfactory. If amplifier...
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BRAKE SERVICE PROCEDURES FOR 2003 Toyota Sienna AUTOMOBILES
Toyota -> Hydraulic Brake Systems -> Component Service -> Assemble -> Disassemble -> Except Sienna -> Inspection -> Master Cylinder -> Overhaul -> Sienna -> Wheel Cylinders
Vehicle: 2003 Toyota Sienna 3.0 V6 GAS
Master Cylinder
Except Sienna
Disassemble
For the following procedures, refer to Fig. for assistance.
- Remove master cylinder boot.
- Remove setscrew and reservoir tank, then the cap and strainer from reservoir.
- Remove two grommets and place cylinder in vise.
- Push piston in and remove stopper bolt, Fig. .
- Push pistons in and remove snap ring, then No. 1 piston carefully by hand.
- Place cylinder on edges of two wooden blocks and tap on cylinder until No. 2 piston comes out.
Inspection
Clean components with compressed air. Inspect cylinder bore for rust and scoring. Also, inspect for wear or ...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 2003 Toyota Sienna AUTOMOBILES
Toyota -> Fuel Filter Scheduled Maintenance -> 1986-06 Models -> Normal Service -> Severe Service
Vehicle: 2003 Toyota Sienna 3.0 V6 GAS
Normal Service
Service as r...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2003 Toyota Sienna AUTOMOBILES
DRIVESHAFT, Replace
Vehicle: 2003 Toyota Sienna 3.0 V6 GAS
- Raise and support vehicle.
- Remove exhaust pipe.
- Have an assistant depress and hold brake pedal.
- Loosen the cross groove joint set bolts a 1/2 turn.
- Place reference marks on both flanges.
- Remove nuts, bolts and washers at flanges.
- Remove bolts and adjusting shims from...
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TIRE PRESSURE MONITORING SYSTEM PROCEDURES FOR 2003 Toyota Sienna AUTOMOBILES
Relearn Procedures
Vehicle: 2003 Toyota Sienna 3.0 V6 GAS
- Check and adjust tire pressure to manufacturer's specifications.
- Turn the ignition switch to On position.
- Press and the hold tire pressure warning reset switch until warning lamp blinks three times at a one second interval. Continue pressing tire pressure warning switch for approx...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2003 Toyota Sienna AUTOMOBILES
Starter, Replace
Vehicle: 2003 Toyota Sienna 3.0 V6 GAS
- Disconnect battery ground cable.
- Remove battery and battery tray.
- On models equipped with cruise control, remove cruise control actuator.
- On all models, discon...
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MAINTENANCE LAMP RESET PROCEDURES FOR 2003 Toyota Sienna AUTOMOBILES
Toyota -> Malfunction Indicator Lamp (MIL) ->
Vehicle: 2003 Toyota Sienna 3.0 V6 GAS
On some models equipped with OBD II, the MIL will also illuminate if the fuel tank filler cap is not properly tightened. Tighten fuel tank filler cap until it clicks.
The MIL should light when the ignition switch is placed in the On position without starting the engine. When the engine is started, the lamp should go out. If it remains lit, a fault has been detected by the diagnostic system and has logged a diagnostic trouble code. If the fault does not occur again within three trips, the lamp will go out but a diagnostic tro...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2003 Toyota Sienna AUTOMOBILES
Coolant Hose, Replace -> Lower -> Upper
Vehicle: 2003 Toyota Sienna 3.0 V6 GAS
Lower
- Disconnect battery ground cable.
- Drain cooling system into a suitable container by loosening drain plug of radiator.
- Reposition hose clamp at radiator outlet.
- Remove hose from radiator.
- Reposition hose clamp at water inlet.
- Remove hose from water inlet.
- Remove hose from vehicle.
- Reverse procedure t...
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SERPENTINE BELT SERVICE PROCEDURES FOR 2003 Toyota Sienna AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 2003 Toyota Sienna 3.0 V6 GAS
- Rotate or lift the belt tensioner arm, using a suitable tool to relieve tension from dr...
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COMPONENT LOCATION DIAGRAMS FOR 2003 Toyota Sienna AUTOMOBILES
Component location diagrams for most 2003 Toyota Sienna cars and light trucks sold in the U.S. from 1990+.
 Power Outlet Diagram for 2003 Toyota Sienna 3.0 V6 GASComponents on diagram: |
 Supplemental Restraint Components Diagram for 2003 Toyota Sienna 3.0 V6 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 2003 Toyota Sienna AUTOMOBILES
OEM drawn wiring diagrams for most 2003 Toyota Sienna cars and light trucks sold in the U.S.
 2003 Toyota Sienna 3.0 V6 GAS Wiring DiagramComponents on diagram: |
 2003 Toyota Sienna 3.0 V6 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 2003 Toyota Sienna AUTOMOBILES
OEM TSB listings for most 2003 Toyota Sienna cars and light trucks sold in the U.S. from 1985+.
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Document: LONG TERM VEHICLE STORAGE GUIDELINES Vehicle: 2003 Toyota Sienna 3.0 V6 GAS Auto Systems: |
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Document: UPPER/LOWER WINDSHIELD/REAR GLASS TICK NOISE - REVISED Vehicle: 2003 Toyota Sienna 3.0 V6 GAS Symptoms: |
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COMPONENT/PARTS SPECIFICATIONS FOR 2003 Toyota Sienna AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2003 Toyota Sienna cars and light trucks sold in the U.S. and Canada from 1970+.
- Brake caliper mounting bolt torque
- Brake drum runout, machining, & discard specs
- Minimum brake lining thickness.
- Brake rotor runout, parallelism, machining, discard, & finish specs
A/C SYSTEM SPECIFICATIONS: Air conditioning refrigerant capacity and type as well as lubricant capacity for most 2003 Toyota Sienna cars and light trucks sold in the U.S. and Canada from 1980+.
- Refrigerant capacity & type, compressor oil viscosity, total system oil capacity & compressor clutch gap
COOLING SYSTEM BLEED: Cooling system bleeder valve identification, bleeder type and bleed procedures for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1986+.
PREVENTIVE MAINTENANCE: Preventive maintenance recommendations and required services for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1980+. Includes severe and routine service schedules
QUICK-LUBE and ILLUSTRATIONS: Fluid recommendations, capacities, drain plug torques, tire data, and severe service recommended preventive maintenance schedules. Information covers most 2003 Toyota Sienna cars and light trucks sold in the U.S. and Canada from 1980+. Engine and chassis service images.
- Automatic transmission/transaxles capacities, lubricant recommendations
- Differential/final drive capacities, lube recommendations, grades, & viscosities
- Final drive fill & drain plug torques
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Manual transmission/transaxle capacities, lube recommendations, grades, & viscosities
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Engine oil capacities, API grade recommendations, SAE viscosity recommendations, drain plug torque
- Severe service maintenance & interval recommendations
- Tire sizes, wheel nut/bolt torque, pressures & rim sizes
- Transfer case capacities, lube recommendations, grades, & viscosities
TUNE-UP & DRIVEABILITY SPECIFICATIONS: Most tune-up specifications for most 2003 Toyota Sienna cars and light trucks sold in the U.S. and Canada from 1980+
- Airflow sensor electrical specifications
- Tensioning specifications for systems with automatic tensioners
- Barometric pressure sensor specs
- Battery group number and cranking performance
- Crankshaft & camshaft position sensor resistance
- Engine compression pressures
- Coolant temperature sensor specs
- Computer advance.
- Diesel fuel temperature sensor resistance.
- Distributor advance specifications
- Ignition pickup coil resistance
- Exhaust gas recirculation temperature sensor resistance
- Engine fastener torque values
- Firing order diagrams
- Fuel system pressures
- Generator (alternator) specs
- Intake air temperature sensor specs
- Ignition coil specifications
- Fuel injector resistance
- Engine idle speeds
- Knock sensor resistance
- Manifold absolute pressure sensor specs
- Mixture control solenoid resistance
- Voltage regulator specs
- Spark plug applications & gaps
- Starter motor electrical specs.
- Tensioning specifications for systems without automatic tensioners
- Throttle body temperature sensor resistance
- Ignition timing in degrees at rpm
- Transmission oil temperature sensor resistance
- Throttle position sensor specs
- Vacuum sensor valve specs
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