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2003 Toyota Corolla 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
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- 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 Corolla 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 Corolla automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR 2003 Toyota Corolla AUTOMOBILES
Toyota -> Component Replacement & Adjustment -> Evaporator Core, Replace -> Avalon -> Camry -> Camry Solara -> Celica -> Corolla -> Corolla Matrix -> Echo -> Front -> Highlander -> Land Cruiser -> MR2 -> RAV4 -> Rear -> Sequoia & Tundra -> Sienna -> Tacoma & 4Runner
Vehicle: 2003 Toyota Corolla 1.8 L4 GAS
Avalon
- Recover refrigerant as outlined under .
- Drain coolant into a suitable container until level falls below heater core fittings.
- Disconnect suction tube at firewall using claw tool No. 09870-00015, or equivalent. Cap open fittings, then discard O-rings.
- Disconnect liquid tube at firewall using claw tool No. 09870-00025, or equivalent. Cap open fittings, then discard O-rings.
- Disconnect heater hoses at core fittings.
- Remove instrument panel as outlined under "Instrument Panel, Replace."
- Remove ECMs and ECUs for improved acces...
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BRAKE SERVICE PROCEDURES FOR 2003 Toyota Corolla AUTOMOBILES
Toyota -> Rear Disc & Parking Brakes -> Tightening Specifications
Vehicle: 2003 Toyota Corolla 1.8 L4 GAS
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FUEL FILTER REPLACEMENT PROCEDURES FOR 2003 Toyota Corolla AUTOMOBILES
Toyota -> Fuel Filter Scheduled Maintenance -> 1986-06 Models -> Normal Service -> Severe Service
Vehicle: 2003 Toyota Corolla 1.8 L4 GAS
Normal Service
Service as r...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2003 Toyota Corolla AUTOMOBILES
CV AXLE SHAFT, Replace
Vehicle: 2003 Toyota Corolla 1.8 L4 GAS
- Raise and support vehicle.
- Remove wheel and tire assembly.
- Drain transmission fluid.
- Unstake driveshaft hub nut.
- With an assistant applying brakes, remove driveshaft hub nut.
- Remove nut and disconnect stabilizer link from shock absorber assembly.
- On models with ABS, proceed as follows:
- Remove sensor wire clamp.
- Remove bolt and disconnect sensor wire from shock absorber assembly.
- Remove bolt and disconnect ABS speed sensor from steering knuckle.
- On all models, remove cotter pin and nut from outer tie rod end.
- Disconnect tie rod assembly from steering knuckle using a suitable pry tool...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2003 Toyota Corolla AUTOMOBILES
Alternator, Replace
Vehicle: 2003 Toyota Corolla 1.8 L4 GAS
- Disconnect battery ground cable.
- Release tensioner (clockwise) and remove drive belt.
- Remove dust cap and nut, then wire harness.
- Dis...
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CABIN AIR FILTER LOCATIONS & REPLACEMENT PROCEDURES FOR 2003 Toyota Corolla AUTOMOBILES
Cabin Air Filter Service -> Toyota -> 2003-09 Corolla & 2005-09 Avalon
Vehicle: 2003 Toyota Corolla 1.8 L4 GAS
On 2003-04 models, under normal operating conditions the cabin air filter should be replaced every 18 months or 22,500 miles. In dusty areas change the cabin air filter every 10,000 miles.
On 2005-08 Corolla models, the cabin air filter should be replaced every 24 months or 20,000 miles. The filter should be replaced more often if air flow is less than normal.
On 2005-09 Avalon models, 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 tha...
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MAINTENANCE LAMP RESET PROCEDURES FOR 2003 Toyota Corolla AUTOMOBILES
Toyota -> Low Oil Level Warning Indicator ->
Vehicle: 2003 Toyota Corolla 1.8 L4 GAS
This lamp lights to indicate that the engine oil level is below a specified level. The lamp will be illuminated during engine start-up. If...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2003 Toyota Corolla AUTOMOBILES
Radiator, Replace
Vehicle: 2003 Toyota Corolla 1.8 L4 GAS
- Remove upper radiator front fender apron, then upper radiator support seals.
- Drain engine coolant into a suitable container.
- Remove front bumper cover, then air cleaner, Fig. .
- Disconnect radiator reservoir hoses, then remove bolt and engine coolant reservoir.
- Disconnect electric cooling fan connectors, then radiator and oil cooler hoses from...
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SERPENTINE BELT SERVICE PROCEDURES FOR 2003 Toyota Corolla AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 2003 Toyota Corolla 1.8 L4 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 Corolla AUTOMOBILES
Component location diagrams for most 2003 Toyota Corolla cars and light trucks sold in the U.S. from 1990+.
 Sliding Roof System Location Diagram for 2003 Toyota Corolla 1.8 L4 GASComponents on diagram: |
 Electrical Wiring Routing Diagram for 2003 Toyota Corolla 1.8 L4 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 2003 Toyota Corolla AUTOMOBILES
OEM drawn wiring diagrams for most 2003 Toyota Corolla cars and light trucks sold in the U.S.
 2003 Toyota Corolla 1.8 L4 GAS Wiring DiagramComponents on diagram: |
 2003 Toyota Corolla 1.8 L4 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 2003 Toyota Corolla AUTOMOBILES
OEM TSB listings for most 2003 Toyota Corolla cars and light trucks sold in the U.S. from 1985+.
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Document: LONG TERM VEHICLE STORAGE GUIDELINES Vehicle: 2003 Toyota Corolla 1.8 L4 GAS Auto Systems: |
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Document: UPPER/LOWER WINDSHIELD/REAR GLASS TICK NOISE - REVISED Vehicle: 2003 Toyota Corolla 1.8 L4 GAS Symptoms: |
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COMPONENT/PARTS SPECIFICATIONS FOR 2003 Toyota Corolla AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2003 Toyota Corolla 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 Corolla 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 Corolla 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 Corolla 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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