Engine Controls - System/Component Tests - 4.0L

• Introduction
• Computerized Engine Controls
  • Powertrain Control Module (Pcm)
    • Power & Ground Circuits
• Engine Sensors & Switches
  • Camshaft Position Sensor
  • Coolant Temperature Sensor
  • Crankshaft Position Sensor
  • Intake Air Temperature Sensor
  • Manifold Absolute Pressure (Map) Sensor
  • Oxygen (Ho2S) Sensor (Heating Element)
  • Park/Neutral Switch (Aw-4 A/T)
  • Park/Neutral Switch (30RH, 32RH, 42RE & 42RH A/T)
  • Throttle Position (TP) Sensor
    • Notes
    • Vehicle Speed Sensor
• Modules, Motors & Relays
  • Theft Alarm Module (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
• Fuel System
  • Fuel Delivery
    • Notes
    • Fuel System Pressure Release Procedure
    • Fuel System Pressure Test (Cherokee & Wrangler)
    • Fuel System Pressure Test (Grand Cherokee)
    • Fuel Pressure Leak-Down Test (Cherokee & Wrangler)
    • Fuel System Pressure Leak-Down Test (Grand Cherokee)
    • Fuel Pump Capacity Test
    • Fuel Pump Relay
  • Fuel Control
    • Fuel Injectors
    • Oxygen (HO2S) Sensor
• Idle Control System
  • Idle Air Control (IAC) Motor
• Ignition System
  • Timing Control Systems
• 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
• Wiring Diagrams
  • CHEROKEE
  • Grand CHEROKEE
  • Wrangler