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MODEL SELECTION INDEX
VT SERIES II - COMMODORE, CALAIS SERVICE INFORMATION
SECTION 6C3-1 - GENERAL INFORMATION - GEN III V8 ENGINE
1. GENERAL DESCRIPTION
1.1 POWERTRAIN CONTROL MODULE (PCM)
SERIAL DATA COMMUNICATIONS
THE DIAGNOSTIC EXECUTIVE
PCM PROGRAMMING
PCM/PIM/BCM SECURITY LINK
PCM MEMORY FUNCTIONS
1.2 POWERTRAIN INTERFACE MODULE (PIM)
1.3 ENGINE INFORMATION SENSORS AND SIGNALS
ENGINE COOLANT TEMPERATURE (ECT) SENSOR
ENGINE COOLANT LEVEL SWITCH
MASS AIR FLOW (MAF) SENSOR
INTAKE AIR TEMPERATURE (IAT) SENSOR
MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR
SPEED DENSITY SYSTEM
HEATED OXYGEN SENSORS (HO2S)
THROTTLE POSITION (TP) SENSOR
KNOCK SENSORS (KS)
PARK, REVERSE, NEUTRAL, DRIVE, LOW (PRNDL) SWITCH
A/C REQUEST SIGNAL
A/C REFRIGERANT PRESSURE TRANSDUCER
VEHICLE SPEED SENSOR (VSS)
CRANKSHAFT POSITION (CKP) SENSOR
CAMSHAFT POSITION (CMP) SENSOR
BATTERY VOLTAGE
TRANSMISSION ECONOMY/POWER SWITCH
THEFT DETERRENT SYSTEM
OIL PRESSURE SENSOR
MANUAL TRANSMISSION REVERSE LOCKOUT SOLENOID
BRAKE PEDAL SWITCHES
1.4 FUEL CONTROL SYSTEM
SYSTEM OVERVIEW
COMPONENTS
FUEL METERING MODES OF OPERATION
FUEL METERING SYSTEM COMPONENT DESCRIPTION
1.5 IDLE AIR CONTROL (IAC) VALVE
IDLE AIR VALVE POSITION RESET
1.6 ELECTRONIC IGNITION SYSTEM
IGNITION SYSTEM OVERVIEW
COMPONENTS
CIRCUITS AFFECTING IGNITION CONTROL
NOTEWORTHY IGNITION INFORMATION
POWERTRAIN CONTROL MODULE (PCM)
RESULTS OF INCORRECT OPERATION
1.7 CRANKCASE VENTILATION SYSTEM
RESULTS OF INCORRECT OPERATION
1.8 EVAPORATIVE EMISSION
RESULTS OF INCORRECT OPERATION
1.9 ELECTRIC COOLING FANS
ENGINE COOLING FAN LOW SPEED
ENGINE COOLING FAN HIGH SPEED
1.10 A/C CLUTCH CONTROL
ECC SYSTEM
STANDARD A/C SYSTEM
1.11 ELECTRONIC TRACTION CONTROL
PURPOSE
1.12 AIR INTAKE SYSTEM
1.13 AUTOMATIC TRANSMISSION SENSORS & SIGNALS
1-2 (A) AND 2-3 (B) SHIFT SOLENOID VALVES
3-2 SHIFT SOLENOID VALVE ASSEMBLY
TRANSMISSION PRESSURE CONTROL SOLENOID
TORQUE CONVERTER CLUTCH SOLENOID VALVE
TORQUE CONVERTER CLUTCH PWM SOLENOID VALVE
TRANSMISSION FLUID PRESSURE (TFP) MANUAL VALVE POSITION SWITCH
VEHICLE SPEED SENSOR
AUTOMATIC TRANSMISSION FLUID TEMPERATURE SENSOR
ELECTRICAL CONNECTOR
1.14 ABBREVIATIONS AND GLOSSARY OF TERMS
POWERTRAIN MANAGEMENT
AUTOMATIC TRANSMISSION
SHIFT CONDITION DEFINITIONS