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2003 Toyota Tundra 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
- Starter & Alternator Replacement
- Cabin Air Filter Locations & 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 Tundra 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 Tundra automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR 2003 Toyota Tundra AUTOMOBILES
Toyota -> Component Replacement & Adjustment -> Thermostat, Replace -> 1MZ-FE Engine -> 2AZ-FE Engine -> 2RZ-FE & 3RZ-FE Engines -> 5S-FE Engine -> 5VZ-FE Engine -> Avalon -> Camry & Camry Solara -> Celica -> Corolla & Corolla Matrix -> Echo -> Highlander -> Land Cruiser, Sequoia & Tundra -> MR2 -> RAV4 -> Sienna -> Tacoma & 4Runner
Vehicle: 2003 Toyota Tundra 3.4 V6 GAS
Avalon
- Drain coolant into a suitable container.
- Remove engine appearance cover mounting nuts, then the cover.
- Remove air cleaner hose and resonator assembly.
- Disconnect heater hoses as required.
- Disconnect ECT sensor electrical connectors.
- Remove wiring harness protector mounting nut, disconnect clamp, then move protector away from cylinder head.
- Remove water inlet pipe mounting nut at lefthand cylinder head, then separate pipe from head. Discard O-ring.
- Remove three thermostat housing mounting nuts, then the housing and therm...
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BRAKE SERVICE PROCEDURES FOR 2003 Toyota Tundra AUTOMOBILES
Toyota -> Power Brake Units -> Diagnosis & Testing -> Air Tightness Check -> Brake Booster Operational Test -> Operating Check
Vehicle: 2003 Toyota Tundra 3.4 V6 GAS
Brake Booster Operational Test
Operating Check
- Depress brake pedal several times with engine stopped, and ensure pedal reserve distance has no change, Fig. .
- Depress brake pedal and start engine. If pedal drops slightly, operation is normal.
Air Tightness Check
- Start engine and stop after one or two minutes.
- Depress brake peda...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 2003 Toyota Tundra AUTOMOBILES
Toyota -> Fuel Filter Replacement -> Land Cruiser, Pickup, Previa, Sequoia, Tacoma, Tundra, T100, Truck & Van -> Fuel System Pressure Relief -> Models Less Union Bolt Fuel Line Connection -> Models w/Union Bolt Fuel Line Connection -> Removal & Installation
Vehicle: 2003 Toyota Tundra 4.7 V8 GAS
Fuel System Pressure Relief
Models w/Union Bolt Fuel Line Connection
- Obtain the vehicle owners radio theft protection code prior to disconnecting the battery ground cable, if equipped.
- Disconnect the battery ground cable.
- Remove the fuel fill cap to release fuel tank pressure.
- Place a shop towel over the union bolt at top of fuel filter. Slowly loosen the union bolt allowing fuel pressure to bleed down.
- Whenever the union bolt is loosened to relieve fuel system pressure, always replace the bolt gasket.
Models Less Union Bolt Fuel...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2003 Toyota Tundra AUTOMOBILES
DRIVESHAFT, Replace -> Front -> Rear
Vehicle: 2003 Toyota Tundra 3.4 V6 GAS
Front
- Place vehicle in neutral.
- Release parking brake.
- Raise and support vehicle and support it with safety stands in proper locations.
- Place matchmarks on the propeller shaft and front differential flanges.
- Remove bolts, nuts, and washers from differential flange.
- Suspend the front side of the propeller shaft.
- Place matchmarks on the propeller shaft and transfer flanges.
- Remove bolts, nuts, and washers from transfer flanges.
- Remove front propeller shaft.
- Reverse procedure to install, noting the following:
- Torque differential flange bolts to 54 ft. lbs.
- Torque ...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2003 Toyota Tundra AUTOMOBILES
Starter, Replace
Vehicle: 2003 Toyota Tundra 3.4 V6 GAS
- Disconnect battery ground cable.
- On models equipped with audio coded anti-theft system, obtain three-digit system code.
- On all models, if required, remove battery, battery tray and/or igniter bracket.
- Remove air cleaner assembly, if required.
- Disconnect electrical connec...
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CABIN AIR FILTER LOCATIONS & REPLACEMENT PROCEDURES FOR 2003 Toyota Tundra AUTOMOBILES
Cabin Air Filter Service -> Toyota -> Tundra
Vehicle: 2003 Toyota Tundra 3.4 V6 GAS
The cabin air filter should be cleaned every 18 months or 15,000 miles and replaced every 36 months or 30,000 miles. The filter should be replaced more often if air flow is less than normal.
- Open the glove compartment door.
- Slide off the glove damper rod, Fig. .
- Push inward on each side of the glove compartment door to disengage claws, Fig. .
- Remove the cabin air filter c...
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MAINTENANCE LAMP RESET PROCEDURES FOR 2003 Toyota Tundra AUTOMOBILES
Toyota -> Automatic Transmission Overdrive Lamp ->
Vehicle: 2003 Toyota Tundra 3.4 V6 GAS
The "OD Off" lamp will be illuminated when the ignition switch is in the On position and the Overdrive (OD) switch is in the Off position. When the OD switch is placed in the On position, the "OD Off" lamp should go out. If the lamp flashes when the switch is placed in the On position, a fault has been detected by the electronic control system. After diagnosis and repair are c...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2003 Toyota Tundra AUTOMOBILES
Coolant Hose, Replace -> Lower -> Upper
Vehicle: 2003 Toyota Tundra 3.4 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 Tundra AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 2003 Toyota Tundra 3.4 V6 GAS
- Raise and support vehicle.
- Remove engine under cover.
- Loosen idle pulley lock nut.
- Loosen drive belt tensi...
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COMPONENT LOCATION DIAGRAMS FOR 2003 Toyota Tundra AUTOMOBILES
Component location diagrams for most 2003 Toyota Tundra cars and light trucks sold in the U.S. from 1990+.
 Stop Light Components Diagram for 2003 Toyota Tundra 4.7 V8 GASComponents on diagram: |
 Refrigerant Line Diagram for 2003 Toyota Tundra 4.7 V8 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 2003 Toyota Tundra AUTOMOBILES
OEM drawn wiring diagrams for most 2003 Toyota Tundra cars and light trucks sold in the U.S.
 2003 Toyota Tundra 4.7 V8 GAS Wiring DiagramComponents on diagram: |
 2003 Toyota Tundra 4.7 V8 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 2003 Toyota Tundra AUTOMOBILES
OEM TSB listings for most 2003 Toyota Tundra cars and light trucks sold in the U.S. from 1985+.
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Document: A340 TRANSMISSION SOLENOID IDENTIFICATION Vehicle: 2003 Toyota Tundra 4.7 V8 GAS Auto Systems: |
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Document: LONG TERM VEHICLE STORAGE GUIDELINES Vehicle: 2003 Toyota Tundra 4.7 V8 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 2003 Toyota Tundra AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2003 Toyota Tundra 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 Tundra 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 Tundra 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 Tundra 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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