Engine Controls - System/Component Tests

• Introduction
• Computerized Engine Controls
  • ECM Ground Circuit
  • ECM Power Circuit
• Engine Sensors & Switches
  • Coolant Temperature Sensor (Codes 14 & 15)
  • Exhaust Gas Oxygen (O2) Sensor (Codes 13, 44 & 45)
  • Hall Effect (Pick-Up) Sensor
  • Manifold Absolute Pressure (Map) Sensor (Codes 33 & 34)
  • Park/Neutral (P/N) Switch
  • Throttle Position Sensor (TPS) (Codes 21 & 22)
  • Shift Light (M/T)
  • Vehicle Speed Sensor (VSS) (Code 24)
• Relays, Solenoids & Modules
  • Relays
    • A/C Clutch Control & Relays
    • Cooling Fan Relays
  • Solenoids
    • Torque Converter Clutch (TCC) Solenoid
  • Modules
    • Ignition Module
• Fuel System
  • Fuel Delivery
  • Fuel Injector Control
    • Fuel Injector Solenoid
• Idle Control System
  • Idle Air Control (IAC) Valve
• Ignition System
  • Notes
  • Ignition Coil Testing
  • Timing Control Systems
    • Electronic Spark Timing (EST) Function Code 42
• Emission Systems & Sub-Systems
  • Evaporative Emission Control System (EECS)
    • Testing Diaphragm-Operated Purge Valve
  • Exhaust Gas RECIRCULATION (EGR)
    • EGR Valve (Code 32)
  • PCV System
  • Thermostatic Air Cleaner (THERMAC)
    • Fault Diagnosis
    • Testing
• Miscellaneous Controls
  • Notes
  • A/C Clutch
    • A/C Clutch Control & Relays
  • Cooling Fan
    • Cooling Fan Relays
  • Transmission
    • Park/Neutral (P/N) Switch
    • Torque Converter Clutch (TCC) Solenoid
    • Torque Converter Clutch (TCC)
    • Shift Light (M/T)
• Diagnostic Charts
  • Code 32 - Exhaust Gas RECIRCULATION (EGR) System Failure
    • Diagnostic Aids
  • Code 33 - Map Sensor CKT (Signal Voltage High - Low Vacuum)
  • Code 34 - Map Sensor CKT (Signal Voltage Low - High Vacuum)
    • Notes
    • Diagnostic Aids
  • Chart C-2C - Idle Air Control (IAC) System Check
    • Notes
    • Diagnostic Aids
    • Vacuum Leak (High Idle)
    • System Too Lean (High Air/Fuel Ratio)
    • System Too Rich (Low Air/Fuel Ratio)
    • IAC Valve Electrical Connections
  • Chart C-8A - Torque Converter Clutch (TCC)
    • Notes
    • Diagnostic Aids
  • Chart C-8B - Shift Light Check
  • Chart C-10 - A/C Compressor Clutch Control
  • Chart C-12 - Engine Cooling Fan (With A/C)