Engine Controls Schematics

WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Module Power, Ground, Serial Data, and MIL Schematic

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Fig 2: 5-Volt and Low Reference Schematic

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Fig 3: Pressure and Temperature Sensors Schematic

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Fig 4: MAF and VSS Schematic

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Fig 5: Oxygen Sensors Schematic

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Fig 6: Electronic Throttle Controls Schematic

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Fig 7: Ignition Controls Schematic

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Fig 8: Fuel Pump Controls Schematic

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Fig 9: Fuel Injectors Schematic

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Fig 10: EVAP, EGR and FTP Controls Schematic

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Fig 11: AIR Controls (NU3) Schematic

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Fig 12: Controlled/Monitored Subsystem References Schematic

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Fig 13: A/T Control References Schematic

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