V8 MCU Control System

• Description
• Operation
  • Microprocessor Control Unit (MCU)
  • Engine Sensors
    • Coolant Temperature
    • Vacuum Switches
    • Oxygen Sensor
    • Engine Speed
    • Knock Sensor
    • Barometric Pressure Sensor
    • Self-Test Connector
  • Engine Controls
    • Notes
    • Thermactor Controls
    • Air/Fuel Controls
    • Canister Purge Solenoid
    • Throttle Kicker
    • Ignition Control
• Diagnosis & Testing
  • Notes
  • Preparation For Testing
  • Function Tests
    • Key On Engine Off (KOEO) Test
    • Engine Running Test
  • Non-Code Tests
    • No Start Test
    • No Self-Test Output
    • Spark Knock Test
• Circuit Tests
  • Instructions For Using The Circuit Tests
  • Code 1-2 Idle Speed Incorrect
  • Code 2-5 Knock Detection System
  • Code 4-1 Fuel Always Lean
  • Code 4-2 Fuel Always Rich
  • Code 4-4 THERMACTOR Check
  • Code 4-5 THERMACTOR Air Diverter
  • Code 4-6 THERMACTOR Air By-Pass
  • Codes 5-1 & 5-5 Zone Vacuum Switch Open
  • Codes 5-3 & 5-4 Temperature Switch Open
  • Code 6-2 Barometric Pressure Switch
  • Code 6-5 Zone Vacuum Switch Closed
• Wiring Diagrams