Engine Controls - System/Component Tests - 2.5L & 4.0L

• Introduction
• Computerized Engine Controls
  • Powertrain Control Module (Pcm)
    • Power & Ground Circuits
• Fuel System
  • Fuel Delivery
    • Notes
    • Fuel System Pressure Release Procedure
    • Fuel System Pressure Test
    • Fuel Pressure Leak-Down Test
    • Fuel Pump Capacity Test
    • Fuel Pump Relay
  • Fuel Control
    • Fuel Injectors
    • Oxygen (O2) Sensor
• Idle Control System
  • Idle Air Control (IAC) Motor
• Ignition System
  • Timing Control System
• Emission Systems & Sub-Systems
  • Crankcase Ventilation System
  • Fuel Evaporation
• Miscellaneous Controls
  • A/C Compressor Clutch
    • A/C Compressor Clutch Relay
  • Radiator (Cooling) Fan
    • Radiator (Cooling) Fan Relay
• Engine Sensors & Switches
  • Camshaft Position Sensor
  • Charge Air Temperature Sensor (Grand CHEROKEE)
  • Coolant Temperature Sensor
  • Crankshaft Position Sensor
  • Manifold Absolute Pressure (Map) Sensor
  • Manifold Air Temperature (Mat) Sensor
  • Oxygen (O2) Sensor (Heating Element)
  • Park/Neutral Switch (Aw-4 Auto. Trans.)
  • Park/Neutral Switch (32RH Auto. Trans.)
  • Throttle Position Sensor (TPS)
  • Vehicle Speed Sensor
• Modules, Motors & Relays
  • Modules
    • Theft Alarm Module (Cherokee & Grand Cherokee)
  • Motors
    • Idle Air Control (IAC) Motor
  • Relays
    • A/C Compressor Clutch Relay
    • Automatic Shutdown (ASD) Relay
    • Fuel Pump Relay
    • Radiator (Cooling) Fan Relay
    • Starter Motor Relay