Engine Controls - Theory & Operation

• Introduction
• Computerized Engine Controls
  • Digital Motor Electronics (DME)
    • Notes
    • 318 Series
    • 325 Series & 525i
    • 535i, 735i & 735iL
  • DME/MOTRONIC Control Unit
    • Notes
    • 318 Series
    • 325 Series & 525i
    • 535i, 735i & 735iL
  • Input Devices
    • Notes
    • Airflow Meter/Sensor (535i, 735i & 735iL)
    • Anti-Theft System (DWA)
    • Crankshaft (Speed/Position Pulse) Sensor
    • Cylinder Identification Sensor (535i, 735i & 735iL)
    • Engine (Coolant) Temperature Sensor
    • Intake Air Temperature Sensor
    • Oxygen (Sensor) Control
    • Throttle Position Switch (535i, 735i & 735iL)
    • Throttle Position Sensor (318 Series)
    • Vehicle (Road) Speed Sensor (535i, 735i & 735iL)
  • Output Signals
    • Notes
    • A/C Compressor Shutoff
    • A/C Switch & Compressor
    • CHECK ENGINE Light
    • Fuel Injectors
    • Fuel Tank Vent (Evaporation) Control
    • Fuel Pump Relay
    • Idle Speed Actuator
    • Ignition Timing & Anti-Knock Function
    • Ignition Timing Control
    • Kickdown Prevention
    • DME Master (Main) Relay
• Fuel System
  • Fuel Delivery
    • Notes
    • Fuel Pump
    • Fuel Pump Relay (318 Series, 325 Series & 525i)
    • Fuel Pump Relay (535i, 735i & 735iL)
    • DME Master (Main) Relay (318 Series, 325 Series & 525i)
    • DME Master (Main) Relay (535i, 735i & 735iL)
    • Fuel Pressure Regulator
  • Fuel Control
    • Catalytic Converter Protection (318 Series)
    • Cold Start Control (325 Series & 525i)
    • Cold Start Control (535i, 735i & 735iL)
    • Fuel Injectors (318 Series)
    • Fuel Injectors (325 Series & 525i)
    • Fuel Injectors (535i, 735i & 735iL)
    • Oxygen Sensor Heater Relay & Heating Resistor
  • Idle Speed
    • Idle Speed Actuator (325 Series & 525i)
    • Idle Speed Actuator (535i, 735i & 735iL)
• Ignition Systems
  • Direct Ignition System (Dis)
    • Ignition Timing & Anti-Knock Function (318 Series)
    • Ignition Timing Control (325 Series & 525i)
    • Engine Protection Function (325 Series & 525i)
    • Catalytic Converter Protection Function (325 Series & 525i)
  • Conventional Ignition System
    • Ignition Timing Control (535i, 735i & 735iL)
• Emission Systems
  • Fuel Tank Vent (Evaporation) Control
    • 325 Series & 525i
    • 535i, 735i & 735iL
• Self-Diagnostic System
  • Self-Diagnostic Feature
  • Check Engine Light
• Miscellaneous Controls
  • Notes
  • A/C Compressor Clutch
    • A/C Compressor Shutoff (318 Series)
    • A/C Compressor Shutoff (325 Series & 525i)
    • A/C Switch & Compressor (535i, 735i & 735iL)
  • Transmission
    • Kickdown Prevention (535i, 735i & 735iL)