Engine Controls - Basic Diagnostic Procedures

• Introduction
• Preliminary Inspection & Adjustments
  • Visual Inspection
  • Mechanical Inspection
    • Notes
    • Cylinder Compression Pressure
    • Cylinder Combustion Pressure Leakage
    • Checking Engine Vacuum
• No-Start Diagnosis
  • Engine Cranks But Does Not Start
  • No Response From Pcm With A No-Start Condition
    • Notes
    • Grand Cherokee
    • Liberty
    • Wrangler
• Fuel Systems
  • Notes
  • Fuel System Pressure Release
  • Fuel Pressure Test
    • Notes
    • Grand Cherokee
    • Liberty & Wrangler
  • Fuel Pump Amperage Test
  • Fuel Pump Capacity Test
    • Notes
    • Grand Cherokee & Wrangler
    • Liberty
  • Fuel Pressure Leak Down Test
    • Notes
    • Grand Cherokee
    • Liberty & Wrangler
  • Fuel Pump Control Circuit
    • Fuel Pump Relay
• Ignition Systems
  • Direct Ignition System
    • Spark
    • Camshaft Position Sensor
    • Crankshaft Position Sensor
    • Ignition Coil Power Source
    • Ignition Coil Resistance
• Idle Speed & Ignition Timing
• Wiring Diagrams
  • Grand CHEROKEE
  • Liberty
  • Wrangler