4.2L Feedback Carburetor Testing

• Description
• Diagnosis & Testing
  • Basic Testing Procedure
  • Connector Pin Locations
  • Test Equipment
• System Test Charts
  • Test Charts Menu
  • MCU Harness & MCU Connector Pin Identification
  • Test No. 1 - Operational Test
  • Test No. 2 - Initialization Test
  • Test No. 3 - Open Loop Switch Test
  • Test No. 4 - Closed Loop Operational Test
  • Test No. 5 - Electronic Ignition Retard Test
  • Test No. 6 - Oxygen Sensor & Closed Loop Test
  • Test No. 7 - "Downstream" Solenoid Test
  • Test No. 8 - "Upstream" Solenoid Test
  • Test No. 9 - Idle Speed Control System Test
  • Test No. 10 - Sole-Vac Vacuum Switching Test
  • Test No. 11 - Sole-Vac Idle Speed Relay Test
  • Test No. 12 - Basic Engine Test
• Removal & Installation
  • Microcomputer Control Unit (MCU)
    • Removal & Installation
  • Stepper Motor
    • Removal & Installation
  • Oxygen (O2) Sensor
    • Removal & Installation
• Wiring Diagrams