Vehicle Reference Voltage (VREF)
The VREF is a consistent positive voltage (5 volts plus or minus 0.5 volt) provided by the PCM. VREF is typically used by 3-wire sensors and some digital input signals.
Home/Ford/Focus ST/Ford Focus ST III (2012-2015)/Repair manual/Engine Controls - Description & Operation (except Diesel & Hybrid) (section 1)/Vehicle Reference Voltage (VREF)
Contents
Section: Engine Controls - Description & Operation (except Diesel & Hybrid) (section 1) All sections- Abbreviations
- Accessory Drive Belts
- Airbag
- Anti-Lock/traction Control
- Automatic Dual Clutch Transaxle (dct) Powershift (dps6/6dct250)
- Automatic HVAC System
- Automatic Trans
- Axle Shafts
- Basic Trouble Shooting
- Body Electrical
- Brakes
- Charging System
- Check Lists
- Climate Control System - General Information - Except Electric
- Clutches Manual & Hydraulic
- Communication Devices
- Cooling System (mechanical)
- Cruise Control Systems
- Differentials & Drive Axles
- Door Locks & Anti-Theft Systems
- Drive Cycles
- Driveline/axles
- DTC Index
- Electric Powertrain Cooling
- Electronic Steering
- Emission Applications
- Engine
- Engine - 2.0l Duratec-He
- Engine - 2.0l Ecoboost
- Engine Control Systems
- Engine Controls - Description & Operation (except Diesel & Hybrid) (section 1)
- Engine Performance
- Entertainment Systems
- Exhaust
- Exterior Body Panels
- Exterior Lights
- Exterior/interior Trim
- Frames, Subframes & Crossmembers
- Fuel System
- Gauges & Instrument Panels
- General Servicing - All Makes
- Glass, Frames and Mechanisms (Vehicles With: One-Touch Up Door Window - Except Electric)
- Glass, Frames and Mechanisms (Vehicles Without: One-Touch Up Door Window - Except Electric)
- Hoist/jack
- Horns
- Identification
- Ignition System
- Interior/illumination Lights
- Manual Trans
- Manual Transmission (6-speed) (mmt6)
- Manual Transmission (mtx75)
- MAP Guidelines
- Mechanical
- Mechanical - Hydraulic
- Metric Conversions
- Mirrors
- Mode 6
- Oem Component Harness Location Charts - Except Electric
- Oem Component Harness Location Charts -- Electric
- Oem General Information
- Oem Wiring Diagrams - Except Electric
- Oem Wiring Diagrams -- Electric
- Paint/coatings
- Parking Brake System
- Passive Restraints
- Rear End Sheet Metal Repairs - Except Electric
- Removal & Installation
- Reset Procedures
- Restraints Control Systems
- Schedule
- Seating - Except Electric
- Seats
- Specifications
- Starter
- Steering
- Steering Column
- Steering Column Switches
- Sun Roof/t-Top/convertible Top
- Suspension Front
- Suspension Rear
- Testing & Diagnostics
- Traction Control Disable
- Transmission
- Warning System
- Wheel & Tire System
- Wheel Alignment
- Windows
- Wiper/washer Systems