Engine Controls - Theory & Operation

• Introduction
• Computerized Engine Control Description
• Computerized Engine Control Input Devices
  • Notes
  • Airflow Sensor Position Indicator
  • Air Temperature Sensor
  • Altitude Correction
  • Automatic Transmission (A/T) Shift Lever Position Sensor
  • Coolant Temperature Sensor
  • Crankshaft Position Indicator
  • EGR Temperature Sensor (420SEL & 560 Series - CALIFORNIA)
  • Engine Systems Control Unit (Mas)
  • EZL Ignition Control Unit
  • OVERVOLTAGE Protection Relay
  • TD Signal
  • Throttle Valve Switch
  • Vehicle Speed Signal (In Speedometer)
• Computerized Engine Control Output Signals
  • Notes
  • Air Injection Relay
  • Check Engine Light
  • Differential Fuel Pressure Regulator
  • ELECTROHYDRAULIC Actuator
  • EGR Switchover Valve
  • EZL Ignition
  • Fuel Distributor Unit (U)
  • Idle Speed Air Valve
  • Lambda Control
  • Engine Systems Control Unit (Mas)
  • Start Valve
• Fuel System Delivery
  • Fuel Pump
  • Fuel Pump Relay (Mas)
  • Differential Fuel Pressure Regulator
• Fuel Control System
  • Cranking Enrichment
  • ELECTROHYDRAULIC Actuator (EHA)
  • Fuel Distributor Unit (U)
  • Start Valve
  • Warm-Up Enrichment
• Idle Speed Fuel System
  • Air Valve
• Lambda Fuel Control System
• EZL Ignition System
• Ignition Timing Control
• Emission Systems
  • Air Injection Relay
  • Deceleration Control
  • Exhaust Gas RECIRCULATION (EGR)
  • Evaporative Emissions
• Self-Diagnostic System
  • Check Engine Light
  • Fault Codes