Engine Controls - System/Component Tests

• Introduction
• Air Induction Systems
  • Turbocharger (4.3L)
    • Notes
    • Charge Air Cooler Pump
    • WASTEGATE Diaphragm
    • WASTEGATE Solenoid
• Computerized Engine Controls
  • Control Unit
    • Notes
    • Ground Circuits
    • Power Circuits
    • Quad-Driver Check (Except 3.1L)
  • Engine Sensors & Switches
    • A/C On Switch System Test
    • Brake Switch
    • Coolant Temperature Sensor (Cts)
    • Knock Sensor
    • Manifold Absolute Pressure (Map) Sensor
    • Manifold Air Temperature (Mat) Sensor
    • Oxygen (O2) Sensor
    • Oxygen Sensor Heating Element (4.3L Turbo PFI)
    • Park/Neutral (P/N) Switch
    • Power Steering Pressure Switch (2.5L)
    • Throttle Position Sensor (TPS)
    • Vehicle Speed Sensor (Pm Generator Type)
• Relays, Solenoids, Motors & Modules
  • Relays
    • A/C Relays
    • Fuel Pump Relay
  • Solenoids
    • Notes
    • Canister Purge Solenoid
    • EGR Solenoid
    • WASTEGATE Solenoid (4.3L Turbo PFI)
  • Motors
    • Idle Air Control (IAC) Motor
• Fuel System (Gasoline)
  • Fuel Delivery
    • Notes
    • Fuel Pressure Regulator (TBI)
    • Fuel Pressure Regulator (PFI)
    • 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) Motor
• Fuel System (Diesel Glow Plug System Diagnosis)
  • Notes
  • Normal Glow Plug Circuit Operation
  • Preliminary Glow Plug Diagnosis
  • Inhibit Switch (Black Cap)
  • Glow Plug System Diagnosis
    • Electrical Check
  • No Start - Cold
  • Diesel Cold Advance System Check
    • Notes
    • Cold Advance Relay
  • Glow Plug Controller
  • Injection Pump Housing Leakage Test
  • Injectors
    • Test Preparation
    • Opening Pressure Test
    • Leakage Test
    • Chatter Test
    • Spray Pattern Test
• Ignition System
  • Notes
  • Timing Control Systems
    • Electronic Spark Timing (All Engines)
    • C-5, Electronic Spark Control (ESC) Circuit (Except 2.5L, 4.3L Turbo & Vehicles With 4L80-E Transmission)
    • Electronic Spark Control (ESC) Circuit (4.3L Turbo & Vehicles With 4L80-E Transmission)
• Emission Systems & Sub-Systems (Gasoline)
  • C-6, Air Injection
    • Air Pump
    • Check Valve
    • Electronic Air Control (EAC) Solenoid
  • C-7, Exhaust Gas RECIRCULATION (EGR)
    • System Test
    • EGR Control Solenoid
    • Negative BACKPRESSURE EGR Valve
  • C-3, Fuel Evaporation Control
    • Vapor Canister Purge Valve V8 High Altitude & 4.3L Except "S" & "T" Series)
    • Fuel Tank Pressure Control Valve V8 High Altitude & 4.3L Except "S" & "T" Series)
    • Thermostatic Vacuum Switch (2.8L & 3.1L)
  • PCV
    • Required Service
    • Checking PCV Valve Function (Except 2.5L)
  • Thermostatic Air Cleaner
    • Temperature Sensor Vacuum Motor Type (2.8L)
    • Vacuum Motor Diaphragm (2.8L)
    • Damper Door - Wax Pellet Check (Except 2.8L)
• Emission Systems & Sub-Systems (Diesel)
  • Positive Crankcase Ventilation
    • Crankcase Depression Regulator (CDR)
  • Exhaust Gas RECIRCULATION (EGR)
    • EGR Valve Check
  • Exhaust Pressure Regulation (EPR) System
  • Vacuum Pump
• Miscellaneous ECM Controls
  • Notes
  • C-10, A/C Clutch
    • A/C Clutch Relay
  • C-12, Cooling Fan (3.1L Only)
    • Notes
    • Cooling Fan Relay
    • Cooling Fan Motor
  • C-8, Transmission
    • Torque Converter Clutch (TCC) Solenoid
    • Converter Lock-Up Signal At Transmission
    • Converter Lock-Up Signal From ECM
    • Shift Light (Manual Transmission)
• Idle Air Control (IAC)
• Component Locations