Engine Controls Schematics

WARNING: This page is about a different car, the 2004 Pontiac Grand Am and 2004 Oldsmobile Alero. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Power, Ground, Serial Data and MIL

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Fig 2: 5-Volt and Low Reference Bussing

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Fig 3: Engine Data Sensors - Pressure and Temperature

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Fig 4: Heated Oxygen Sensors

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Fig 5: Ignition System

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Fig 6: Fuel Pump Controls

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Fig 7: Fuel Injectors

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Fig 8: EVAP & IAC Controls

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Fig 9: Controlled/Monitored Subsystem References

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Fig 10: Transmission Controls - A/T

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