Manual sections
Wiring diagrams- Abbreviations
- Accessory Drive Belts
- Adjustments
- Airbag
- Anti-Lock/traction Control
- Application
- Automatic Trans
- Auxiliary Emission Control Systems
- Axle Shafts
- Basic Trouble Shooting
- Brakes
- Cabin Air Filter
- Charging System
- Check Lists
- Clutches Manual & Hydraulic
- Communication Devices
- Cooling Fan
- Cooling System (Mechanical)
- Cruise Control Systems
- Diagnostic Connector Locations
- Door Locks & Anti-Theft Systems
- Drive Cycles
- Driveline/axles
- DTC Index
- Electrical Component Locations
- Emission Applications
- Engine
- Engine Performance
- Exterior Lights
- Fuses & Circuit Breakers
- Gauges & Instrument Panels
- General Servicing - All Makes
- Headlights
- Heated Glass/defoggers
- Heater
- Identification
- Interior/illumination Lights
- Manual & Power Steering
- Manual HVAC System
- Manual Trans
- Mechanical
- Mechanical - Hydraulic
- Metric Conversions
- Mirrors
- Mode 6
- Oem General Information
- Pin Voltage Charts
- Removal & Installation
- Reset Procedures
- Sensor Range Charts
- Specifications
- Starter
- Steering
- Steering Column
- Steering Column Switches
- Suspension Front
- Suspension Rear
- Testing & Diagnostics
- Theory & Operation
- Timing Belt
- Transmission
- Wheel Alignment
- Windows
- Wiper/washer Systems
- Wiring System (Data Link Connectors, Pwr Dist., Grnd Dist.)
Repair manual
Theory & Operation Ford Focus I
Step-by-step instructions on "Theory & Operation" for Ford Focus I (1998–2004). Pick an article — removal, installation, adjustment and diagnostics with illustrations.
5articles
32illustrations
Articles in this section
5 articles- Engine Controls - Theory & Operation - Eec-V - Cng & Gas: Overview
- Engine Controls - Theory & Operation - Eec-V - Cng & Gas: Diagnosis
- Engine Controls - Theory & Operation - Eec-V - Cng & Gas: Overhaul 4
- Engine Controls - Theory & Operation - Eec-V - Cng & Gas: Maintenance
- Engine Controls - Theory & Operation - Eec-V - Cng & Gas: Other 28