Fuel Injection System - MOTRONIC CEC

• Description
• Operation
  • MOTRONIC Control Unit (MCU)
  • Idle Speed Control System
  • Oxygen Sensor
  • Airflow Sensor
  • Throttle Position Sensor
  • Engine Speed Sensor
  • Reference Point Pick-Up
  • Coolant Temperature Sensors
  • MOTRONIC System
• Testing
  • Preliminary Testing
  • Test Equipment
  • Test 1: Fuel Pressure
    • No Fuel Pressure
    • Fuel Pressure Too High
    • Fuel Pressure Too Low
  • Test 2: Fuel Injectors
  • Test 3: MOTRONIC Control Unit
  • Test 4: Cold Start Valve
    • Valve Does Not Open
    • Valve Leaks
  • Test 5: Idle Control Valve
  • Test 6: MOTRONIC Control Unit
  • Test 7: Idle Control Unit
  • Test 8: Engine Speed Sensor & Reference Point Pick-Up
  • Test 9: Airflow Sensor
  • Test 10: Throttle Position Sensor
  • Test 11: Coolant Temp. Sensor
  • Test 12: Coolant Temp. Switch
  • Test 13: THERMOTIMER
• THERMOTIMER Resistance Specifications
  • Notes
  • Test 14: Air Temperature Sensor
• Air Temperature Sensor Resistance Specifications
  • Notes
  • Test 15: Oxygen Sensor
• Wiring Diagrams