Engine Controls - System/Component Tests

• Introduction
• Air Induction Systems
  • Supercharger (C-18)
    • Boost Control Solenoid (3.8L VIN 1)
• Computerized Engine Controls
  • Control Unit
    • Ground Circuits
    • Power Circuits
• Engine Sensors & Switches
  • Notes
  • Engine Controls - System/Component Tests
    • A/C ON (A/C Request) Switch Test
    • A/C Pressure Sensor
    • A/C Pressure Switch
    • Brake Switch
    • Camshaft Sensor (3.8L VIN L)
    • Camshaft Sensor (Cadillac)
    • Coolant Temperature Sensor (CTS)
    • Crankshaft Position Sensor (DIS)
    • Crankshaft Position Sensor (IDI)
    • Hall Effect Camshaft Sensor (Cadillac)
    • Intake Air Temperature Sensor
    • Knock Sensor
    • Manifold Absolute Pressure (MAP) Sensor (C-1)
    • Manifold Air Temperature (MAT) Sensor
    • Mass Airflow (MAF) Sensor (3.8L)
    • Oxygen (O2) Sensor
    • Park/Neutral (P/N) Switch (C-1)
    • Power Steering (P/S) Pressure Switch (C-1)
    • Throttle Position Sensor (TPS)
    • Vehicle Speed Sensor (PM Generator Type)
    • Vehicle Speed Sensor (LED Type)
• Motors, Relays & Solenoids
  • Motors
    • Idle Air Control (IAC) Motor & Idle Speed Control (ISC) Motor
  • Relays
    • A/C Clutch Relays
    • Fuel Pump Relay
  • Solenoids
    • Notes
    • Air Injection Solenoids
    • Canister Purge Solenoid
    • EGR Solenoid
• Fuel System
  • Fuel Delivery
    • Notes
    • Fuel Pressure Regulator (PFI)
    • Fuel Pressure Regulator (TBI)
    • Fuel Pump Relay (A-5)
    • Fuel Pump Relay By-Pass Procedure
    • Oil Pressure Switch Fuel Pump Back-Up
  • Fuel Control
    • Fuel Injector(s)
    • PFI Injector Balance Test (C-2)
    • Oxygen Sensor
• Idle Control System (C-2)
  • Engine Controls - System/Component Tests
    • Idle Air Control (IAC) Motor
    • Idle Speed Control (ISC) Motor - Cadillac
    • Idle Switch - Cadillac
• Ignition System
  • Notes
  • Timing Control Systems
    • Electronic Spark Timing (EST) Advance System
    • Electronic Spark Control (ESC) System W/O ESC Controller(C-5)
    • Electronic Spark Control (ESC) Sys W/ESC Controller (C-5)
• Emission Systems & Sub-Systems
  • Air Injection (C-6)
    • Air Pump (Belt-Driven)
    • Check Valve
  • Exhaust Gas RECIRCULATION (C-7)
    • Notes
    • System Test (Vacuum Operated)
    • EGR Control Solenoid (Normally Open)
    • Digital EGR Valve (3.8L)
    • Positive Backpressure EGR Valve
    • Negative Backpressure EGR Valve
  • Fuel Evaporation Control (C-3)
    • Notes
    • Canister Purge Solenoid (Normally Closed)
    • Fuel Tank Pressure Control Valve
  • Positive Crankcase Ventilation (PCV)
    • Required Service
    • Checking PCV Valve Function
  • Thermostatic Air Cleaner
    • Temperature Sensor (Vacuum Motor Type)
    • Vacuum Motor Diaphragm
• Miscellaneous Controls
  • Notes
  • Hot Light Or Coolant Temperature Light
  • Transmission (C-8)
    • Notes
    • Converter Clutch Solenoid
    • Converter Lock-Up Signal At Transmission
    • Converter Lock-Up Signal From ECM
    • Shift Light (Man. Trans.)
  • A/C Clutch (C-10) & Electric Cooling Fan (C-12)
    • Notes
    • A/C Clutch Relay
    • Cooling Fan System & Quad-Driver Check
    • Cooling Fan Relay
    • Cooling Fan Motor
  • Chart C-12A, 3.8L (1 Of 5), Cooling Fan CKT Diagnosis
    • Notes
    • Diagnostic Aids
  • Chart C-12B, 3.8L (2 Of 5) Cooling Fan No Low Speed
  • Chart C-12C-A, 3.8L (3 Of 5), Cooling Fan No High Speed Rear Fan
  • Chart C-12C-B, 3.8L (4 Of 5), Cooling Fan No High Speed Front Fan
  • Chart C-12D, 3.8L (5 Of 5), Cooling Fan On At All Times
    • Notes
    • Diagnostic Aids
  • Chart C-10, 3.8L, A/C Clutch CTRL CKT Diagnosis
• Component Locations
• Wiring Diagrams