Engine Control System & Component Tests - 4.3L

• Introduction
• Computerized Engine Controls
  • Control Unit
    • Notes
    • Ground Circuits
    • Power Circuits
• Engine Sensors & Switches
  • A/C On Switch/System Test
  • Brake Switch
  • Engine Coolant Temperature (ECT) Sensor
  • Intake Air Temperature (IAT) Sensor
  • Knock Sensor
  • Manifold Absolute Pressure (Map) Sensor
  • Oxygen Sensor (O2S)
  • Oxygen Sensor Heating Element
  • Throttle Position (TP) Sensor
  • Transmission Range Switch
  • Vehicle Speed Sensor (Pm Generator)
• Modules, Motors, Relays & Solenoids
  • Relays
    • Notes
    • A/C Clutch Relay
    • Fuel Pump Relay
  • Solenoids
    • Notes
    • Canister Purge Solenoid
    • Idle Air Control (IAC) Valve
    • Torque Converter Clutch (TCC) Solenoid
• Fuel System
  • Fuel Delivery
    • Notes
    • Fuel Pressure Regulator (CSI)
    • Fuel Pump Oil Pressure Switch (Back-Up Circuit)
    • Fuel Pump Relay
    • Fuel Pump Relay By-Pass Procedure
  • Fuel Control
    • Notes
    • Oxygen Sensor (O2S)
    • Central Sequential Port Injector Balance Test (CSI)
    • Injector Coil Test (CSI)
  • Idle Control System
    • Idle Air Control (IAC) Valve
• Ignition System
  • Circuit Description
  • Enhanced Ignition System Check
    • Notes
    • Diagnostic Aids
  • 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
  • Exhaust Gas RECIRCULATION
    • Linear EGR Valve (Digital Valve)
  • Fuel Evaporation Control
    • Canister Purge Solenoid
  • Positive Crankcase Ventilation
    • Required Service
    • 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
  • Relay Location
  • A/C Clutch Circuit Diagnosis
    • Description
    • Compressor Clutch Control Circuit Diagnosis
  • Cooling Fan
  • Scan Tester
  • Electric Cooling Fan Circuit Diagnosis (Without Auxiliary Fan Control Switch)
    • Description
    • Cooling Fan Circuit Diagnosis
• Component Locations