Section 420 (Engine Controls - Theory & Operation - 3.8L)
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 Pontiac Grand Prix, 2003 Pontiac Bonneville, 2003 Chevrolet Monte Carlo, 2003 Chevrolet Impala, and 2003 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
- Introduction
- Air Induction Systems
- Computerized Engine Controls
- Notes
- Powertrain Control Module
- Input Devices
- Notes
- A/C Request Signal
- A/C Pressure Sensor
- A/C Pressure Switches
- A/C Compressor Clutch Relay
- A/C Temperature Sensor
- Automatic Transmission Fluid Temperature
- Automatic Transmission Input Shaft Speed Sensor
- Battery Voltage
- Brake Switch Feedback
- Camshaft Position Sensor
- Crankshaft Sensor
- Engine Coolant Temperature Sensor
- Fuel Level Sensor
- Fuel Tank Pressure Sensor
- Gear Switches
- Generator "L" Light Circuit
- Generator "F" Field Circuit
- Ignition Control Module
- Ignition/Crank Signal
- Intake Air Temperature Sensor
- Knock Sensor
- Manifold Absolute Pressure Sensor
- Mass Airflow Sensor
- Oxygen Sensors
- RPM Reference Signal
- Throttle Position Sensor
- Vehicle Speed Sensor
- Output Signals
- Notes
- A/C Compressor Clutch
- Air Injection System
- Boost Control Solenoid (Supercharger)
- Canister Purge Control Solenoid
- Computer Controlled Coil Ignition
- Cooling Fan Relay
- EGR Control Solenoid
- Fuel Injectors
- Fuel Pump & Fuel Pump Relay
- HOT Light Or Coolant Temperature (TEMP) Light
- Idle Air Control Valve
- Linear EGR Valve
- Knock Sensor Operation
- Malfunction Indicator Light
- Self-Diagnostics
- Serial Data
- Shift Solenoids (Electronically-Controlled Transmission)
- Torque Converter Clutch
- Fuel Systems
- Ignition Systems
- Emission Systems & Sub-Systems
- Self-Diagnostic Systems
- Miscellaneous Controls
- Wiring Diagrams