Section 1 (Engine Controls - System/Component Tests - Gasoline)

• Model Identification
  • Notes
  • Terminology
• Introduction
• Computerized Engine Controls
  • Control Unit
    • Notes
    • Ground Circuits
    • Power Circuits
• Engine Sensors & Switches
  • Engine Controls - System/Component Tests - Gasoline
    • 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
    • Oxygen Sensor Heating Element
    • Park/Neutral (P/N) Switch
    • Throttle Position (TP) Sensor
    • Vehicle Speed Sensor (PM Generator)
• Relays, Solenoids, Motors & Modules
  • Relays
    • A/C Relays
    • Fuel Pump Relay
  • Solenoids
    • Notes
    • Electronic Air Control (EAC) Solenoid
    • EGR Control Solenoid
    • Idle Air Control (IAC) Valve
    • Torque Converter Clutch (TCC) Solenoid
• Fuel System
  • Fuel Delivery
    • Notes
    • Fuel Pressure Regulator (Central & Throttle Body Injection)
    • Fuel Pump Oil Pressure Switch (Back-Up Circuit)
    • Fuel Pump Relay
    • Fuel Pump Relay By-Pass Procedure
  • Fuel Control
    • Fuel Injector(s)
    • Oxygen Sensor
  • Idle Control System
    • Idle Air Control (IAC) Valve
• Ignition System
  • Notes
  • Timing Control Systems (C-4 & C-5)
    • C-4, Ignition Control Circuit
    • C-5, Knock Sensor Circuit (Models Using External Spark Controller Module)
    • C-5, Knock Sensor Circuit (Models Using Knock Sensor With Internal Spark Controller Module)
• Emission Systems & Sub-Systems
  • Air Injection (C-6)
    • Air Pump
    • Check Valve
    • Electronic Air Control (EAC) Solenoid
  • Exhaust Gas RECIRCULATION (C-7)
    • System Test (Vacuum-Controlled Valve)
    • EGR Control Solenoid
    • Negative Backpressure EGR Valve
    • Linear EGR Valve (Digital Valve)
  • Fuel Evaporation Control (C-3)
    • Vapor Canister Purge Valve ("P" Series & 4.3L CPI)
    • Fuel Tank Pressure Control Valve (High-Altitude)
    • Thermostatic Vacuum Switch
  • Positive Crankcase Ventilation
    • Required Service
    • Checking PCV Valve Function
  • Thermostatic Air Cleaner
    • Damper Door Wax Pellet Check
• Miscellaneous ECM Controls
  • Notes
  • Transmission (C-8)
    • Torque Converter Clutch (TCC) Solenoid
    • Converter Lock-Up Signal At Transmission
    • Converter Lock-Up Signal From ECM
    • Shift Light (Manual Transmission)
  • A/C Clutch (C-10)
    • A/C Clutch Relay
  • Cooling Fan (C-12)
    • Notes
    • Cooling Fan Relay
    • Cooling Fan Motor
• Diagnostic Charts
  • A/C Request Signal Circuit Diagnosis
  • Auxiliary Cooling Fan Circuit Diagnosis
• Component Locations
• Wiring Diagrams
  • 4.3L, 5.0L & 5.7L With A/T
  • 4.3L & 7.4L With M/T
  • 5.0L & 5.7L With M/T
  • 7.4L With A/T