Section 21 (Engine Controls - System & Component Testing - 4.3L)

• Introduction
• Air Induction Systems
• Computerized Engine Controls
  • Control Unit
    • Notes
    • Ground Circuits
    • Power Circuits
    • PCM Harness Resistance
  • Diagnostic Trouble Codes
• Engine Sensors & Switches
  • Notes
  • Engine Controls - System & Component Testing - 4.3L
    • Engine Coolant Temperature (ECT) Sensor
    • Intake Air Temperature (IAT) Sensor
    • Engine Oil Level Sensor/Switch Diagnosis
• Modules, Motors, Relays & Solenoids
  • Engine Controls - System & Component Testing - 4.3L
    • Notes
    • A/C Clutch Relay
    • Fuel Pump Relay
    • Canister Purge Solenoid
    • Idle Air Control (IAC) Valve
    • Torque Converter Clutch (TCC) Solenoid
• Fuel System
  • Notes
  • Fuel Delivery
    • Notes
    • Fuel Pressure Regulator (CSI)
    • Fuel Pressure Regulator (SFI)
    • Fuel Pump Oil Pressure Switch (Back-Up Circuit)
  • Fuel Control
    • Notes
    • Fuel Injector Circuit Diagnosis
    • Injector Balance Test
    • Injector Coil Test
  • Idle Control System
    • Idle Air Control (IAC) System Diagnosis
• Ignition System
  • Notes
  • Timing Control Systems
    • Ignition Control Circuit
    • Knock Sensor Circuit (Models Using External Spark Controller Module)
    • Knock Sensor Circuit (Models Using Knock Sensor With Internal Spark Controller Module)
• Emission Systems & Sub-Systems
  • Notes
  • Exhaust Gas RECIRCULATION
    • Exhaust Gas Recirculation (EGR) System Check
    • EGR System Diagnosis
  • Fuel Evaporation Control
    • EVAP Control System Diagnosis (Enhanced System)
    • EVAP Control System Diagnosis (Non-Enhanced System)
    • Fuel Tank Pressure Sensor Diagnosis
  • Positive Crankcase Ventilation
    • Notes
    • Checking PCV Valve Function
• Miscellaneous Pcm/VCM Controls
  • Notes
  • Transmission
    • Notes
    • Torque Converter Clutch (TCC) Solenoid
    • Converter Lock-Up Signal At Transmission
    • Converter Lock-Up Signal From PCM/VCM
  • Pcm Controlled Warning Lights & Gauges
    • Warning Light Diagnosis
    • Tachometer Control Circuit Diagnosis
  • A/C Compressor Clutch Controls
    • Compressor Clutch Controls (RWD)
  • Electric Cooling Fan Control
• Component Locations