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2003 Ford Focus CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Ford 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
A/C & HEATER SERVICE PROCEDURES FOR 2003 Ford Focus AUTOMOBILES
Component Replacement & Adjustment -> Focus -> Blower Motor, Replace
Vehicle: 2003 Ford Focus SE 2.3 L4 GAS
- Remove lower passenger side footwell trim.
- Remove floor level ventilation hose. ...
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BRAKE SERVICE PROCEDURES FOR 2003 Ford Focus AUTOMOBILES
Anti-lock Brakes -> Focus -> Diagnosis & Testing -> Accessing Diagnostic Trouble Codes -> Clearing Diagnostic Trouble Codes -> Diagnostic Trouble Code & Pinpoint Test Reference Chart -> Pinpoint Tests -> Wiring Diagrams
Vehicle: 2003 Ford Focus ZX3 2.0 L4 GAS
Accessing Diagnostic Trouble Codes
To access diagnostic trouble codes, connect a suitable scan tool to vehicle data link connector and follow scan tool instructions.
Diagnostic Trouble Code & Pinpoint Test Reference Chart
Refer to Figs. and for diagn...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 2003 Ford Focus AUTOMOBILES
Ford Motor Co. Passenger Cars -> Fuel Pressure Relief -> Focus, Fusion & Milan
Vehicle: 2003 Ford Focus ZTW 2.0 L4 GAS
Do not smoke or allow an open flame of any type when working on or near any fuel system related components. The highly flammable vapor mixtures may ignite, resulting in serious personal injury.
Prior to disconnecting fuel lines, the fuel system pressure must be relieved to prevent accidental spray of fuel.
When installing the fuel filter, ensure the flow arrow is facing in the proper direction.
After the battery has...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2003 Ford Focus AUTOMOBILES
CV AXLE SHAFT, Replace
Vehicle: 2003 Ford Focus ZTS 2.3 L4 GAS
- Loosen strut lock nut 5 rotations. Use Allen key to prevent piston from rotating.
- Raise and support vehicle, then remove wheel and tire assembly.
- Disconnect ball joint from knuckle.
- Remove hub nut.
- Using puller No. 204-069 and stud extension tool No. 204-085, or equivalents, Fig. , separate halfshaft from wheel hub.
- On right side, remove intermediate shaft bearing mounting nuts.
- On either ...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2003 Ford Focus AUTOMOBILES
Starter, Replace
Vehicle: 2003 Ford Focus LX 2.3 L4 GAS
- Disconnect battery ground cable.
- With vehicle in neutral, position it on a hoist.
- Remove starter motor solenoid terminal cover.
- Remove starter wire terminal nuts and disconnect starter motor wiring.
- Remove power steering pressure line brackets nuts, then detach powers steering pressure line bracket from stud bolt...
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CABIN AIR FILTER LOCATIONS & REPLACEMENT PROCEDURES FOR 2003 Ford Focus AUTOMOBILES
Cabin Air Filter Service -> Ford Motor Co. -> 2000-07 Focus
Vehicle: 2003 Ford Focus ZTW 2.3 L4 GAS
Under normal operating conditions the cabin air filter should be replaced every 15,000 miles. In dusty areas change the cabin air filter more often.
- Position the windshield wipers in the vertical position.
- Open the hood.
- Remove the caps from the righthand side air cowl grille retaining screws.
- Remove the righthand side air cowl grille retaining screws, then the grille.
- Open the service flap, then remove the cabin air filter ...
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MAINTENANCE LAMP RESET PROCEDURES FOR 2003 Ford Focus AUTOMOBILES
Ford Motor Co. Cars -> Powertrain Malfunction Indicator ->
Vehicle: 2003 Ford Focus SE 2.0 L4 GAS
This lamp should light when the ignition is turned On. After engine starts, the lamp should go off, unless a fault condition is detected in the powertrain system. If the lamp remains On a diagnostic trouble code is stored in the PCM. Following diagnosis and repair, the Powertrain Malfunction Indicator will automatically reset when stored diagnostic trouble codes are cleared from PCM memory. The PCM reset procedure allows the scan tool to command the PCM to clear all diagnostic trouble codes.
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2003 Ford Focus AUTOMOBILES
Heater Hose, Replace -> Inlet -> Outlet
Vehicle: 2003 Ford Focus SE 2.0 L4 GAS
Inlet
- Drain cooling system into a suitable container.
- Reposition heater hose inlet clamp at heater core.
- Remove heater inlet hose from heater core.
- Reposition heater core inlet hose clamp at engine.
- Remove hose from engine.
- Remove hose from vehicle.
- Reverse procedure to in...
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SERPENTINE BELT SERVICE PROCEDURES FOR 2003 Ford Focus AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 2003 Ford Focus ZX3 2.3 L4 GAS
- Ensure transmission is in Neutral position, then raise and support vehicle.
- Remove mounting bolts...
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COMPONENT LOCATION DIAGRAMS FOR 2003 Ford Focus AUTOMOBILES
Component location diagrams for most 2003 Ford Focus cars and light trucks sold in the U.S. from 1990+.
Selector Lever Spring Loaded Button Diagram for 2003 Ford Focus LX 2.3 L4 GAS Components on diagram: |
Powertrain Warning Indicator Diagram for 2003 Ford Focus ZX3 2.3 L4 GAS Components on diagram: |
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WIRING DIAGRAMS FOR 2003 Ford Focus AUTOMOBILES
OEM drawn wiring diagrams for most 2003 Ford Focus cars and light trucks sold in the U.S.
2003 Ford Focus ZTS 2.0 L4 GAS Wiring Diagram Components on diagram: |
2003 Ford Focus SE 2.0 L4 GAS Wiring Diagram Components on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 2003 Ford Focus AUTOMOBILES
OEM TSB listings for most 2003 Ford Focus cars and light trucks sold in the U.S. from 1985+.
Document: ENGINE VIBRATION AT IDLE - REVISED Vehicle: 2003 Ford Focus SE 2.0 L4 GAS Symptoms: |
Document: CLUTCH PEDAL RETURN SPRING NOISE AND/OR FREE PLAY - REVISED Vehicle: 2003 Ford Focus SE 2.0 L4 GAS Symptoms: |
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COMPONENT/PARTS SPECIFICATIONS FOR 2003 Ford Focus AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2003 Ford Focus 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 Ford Focus 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 Ford Focus 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 Ford Focus 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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