VSS is a variable reluctance sensor that generates a waveform with a frequency that is proportional to vehicle speed. When vehicle is moving slowly, sensor produces a low frequency signal. As vehicle speed increases, sensor produces a higher frequency signal. The PCM uses this signal to control fuel injection, ignition timing and transmission/transaxle shift points.
Home/Ford/Crown Victoria/Ford Crown Victoria I (1992-1997)/Repair manual/Theory & Operation/Vehicle Speed Sensor (vss)
Contents
Section: Theory & Operation- Introduction
- 1994 Terminology
- Air Induction System
- Mark Viii
- Charge Air Cooler (cac)
- Powertrain Control Module (PCM)
- Constant Control Relay Module (ccrm)
- Variable Control Relay Module (vcrm)
- Input Devices
- Barometric Pressure (baro) Sensor
- Brake On/off (boo) Switch
- Camshaft Position (cmp) Sensor
- Clutch Pedal Position (cpp) Switch
- Coolant Temperature Sensor
- Crankshaft Position (ckp) Sensor
- Data Link Connector (dlc) & Self-Test Input (sti) Connector
- Differential Pressure Feedback EGR (dpfe) Sensor
- Exhaust Gas Recirculation Temperature (egrt) Sensor
- EGR Valve Position (evp) Sensor
- Engine Coolant Temperature (ECT) Sensor
- Flexible Fuel (ff) Sensor
- Heated Oxygen Sensor (HO2S)
- Intake Air Temperature (IAT) Sensor
- Knock Sensor (ks)
- Manifold Absolute Pressure (MAP) Sensor
- Manual Lever Position (mlp) Sensor
- Mass Airflow (MAF) Sensor
- Park/neutral Position (pnp) Switch
- Power Steering Pressure (psp) Switch
- Pressure Feedback EGR (pfe) Sensor
- Programmable Speedometer/odometer Module (psom)
- Throttle Position (tp) Sensor
- Transmission Fluid Temperature (tft) Sensor
- Transmission Speed Sensor (tss)
- Vehicle Speed Sensor (vss)
- Output Signals
- By-Pass Air (bpa) Valve
- Canister Purge Valve
- Canister Purge Solenoid Valve
- EGR System
- Fuel Injectors
- Fuel Pump
- Fuel Pressure Regulator
- Idle Air Control (iac) Solenoid
- Inertia Fuel Shutoff (ifs) Switch
- Malfunction Indicator Light
- Transmission Solenoids
- Electronic Ignition (ei) (high Data Rate) System
- Distributor Ignition (di)
- Emission Systems
- Air Cleaner Temperature Sensor
- Temperature Vacuum Switch (tvs)
- Vacuum Control Switches
- Vacuum Delay Valves
- Vacuum Reservoir
- Vacuum Restrictor
- Vacuum Vent Valves
- Air Injection Systems
- Pulsed Secondary Air Injection (pair) System
- Secondary Air Injection (air) System
- Air By-Pass (airb) Valve
- Pulsed Secondary Air Injection (pair) Valve
- Air Injection Diverter (aird) Valve
- Air Injection (air) Solenoid
- Air Pump
- Air Silencer/filter
- Check Valve
- Combination Air Injection By-Pass (airb) & Air Injection Diverter (aird) Valve
- Dual Air Control Solenoids
- EGR Valve
- EGR Modulator (egrm) Valve
- EGR Vacuum Regulator (evr) Solenoid
- Evaporative Emission System
- Carbon Canister
- Canister Purge (canp) Solenoid Valve
- Canister Purge (canp) Valve
- Fill Control/vent System
- Pressure/vacuum Relief Fuel Cap
- Rollover/vent Valve
- Vapor Vent System
- Positive Crankcase Ventilation (PCV)
- Self-Diagnostic System
- Malfunction Indicator Light (MIL)
- Miscellaneous Controls
- Solenoids
- Abbreviations
- Accessory Drive Belts
- Adjustments
- Airbag
- Anti-Lock/traction Control
- Application
- Automatic HVAC System
- Automatic Trans
- Basic Trouble Shooting
- Brakes
- Charging System
- Check Lists
- Computer Relearn
- Cooling System (mechanical)
- Cruise Control Systems
- Diagnostic Connector Locations
- Differentials & Drive Axles
- Door Locks & Anti-Theft Systems
- Driveline/axles
- Driveshaft & Universal Joints
- Electrical
- Electrical Component Locations
- Electronic Suspension
- Emission Applications
- Engine
- Engine Performance
- Exterior Lights
- Fuses & Circuit Breakers
- Gauges & Instrument Panels
- General Servicing - All Makes
- Heated Glass/defoggers
- Identification
- Manual & Power Steering
- Manual HVAC System
- MAP Guidelines
- Mechanical
- Mechanical - Hydraulic
- Metric Conversions
- Mirrors
- Oem General Information
- Pin Voltage Charts
- Procedures
- Removal & Installation
- Reset Procedures
- Seats
- Sensor Range Charts
- Specifications
- Starter
- Steering
- Steering Column
- Steering Column Switches
- Suspension Front
- Suspension Rear
- Testing & Diagnostics
- Theory & Operation
- Traction Control Disable
- Transmission
- Wheel Alignment
- Windows
- Wiper/washer Systems
- Wiring Diagrams - Engine Performance