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Envoy 4WD
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Engine Control System - 4.2L (Introduction)
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Schematic and Routing Diagrams
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Engine Controls Schematics
Engine Controls Schematics
Fig 1: Power, Ground, Serial Data, and MIL Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 2: 5-Volt and Low Reference Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 3: Engine Data Sensors - Pressure and Temperature Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 4: Engine Data Sensors Schematic - Oxygen Sensors
Courtesy of GENERAL MOTORS CORP.
Fig 5: Engine Data Sensors Schematic - Throttle Actuator Controls and VSS
Courtesy of GENERAL MOTORS CORP.
Fig 6: Ignition Controls Schematic - Ignition System
Courtesy of GENERAL MOTORS CORP.
Fig 7: Ignition Controls Schematic - Sensors
Courtesy of GENERAL MOTORS CORP.
Fig 8: Fuel Controls Schematic - Fuel Pump Controls and Fuel Injectors
Courtesy of GENERAL MOTORS CORP.
Fig 9: Fuel Controls Schematic - EVAP Controls
Courtesy of GENERAL MOTORS CORP.
Fig 10: Device Controls (K18) Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 11: Controlled/Monitored Subsystem References Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 12: Transmission Control References Schematic - A/T
Courtesy of GENERAL MOTORS CORP.