Engine Controls Schematics

WARNING: This page is about a different car, the 2004 Saturn L300. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: PCM Power, Ground, Serial Data & MIL Circuits Wiring Schematic

Courtesy of GENERAL MOTORS CORP.

Fig 2: Engine Data Sensors - 5-Volt & Low Reference Circuits Wiring Schematic

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Fig 3: Engine Data Sensors - Sensors & Switches Circuits Wiring Schematic

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Fig 4: HO2 Sensors Circuit Wiring Schematic

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Fig 5: Ignition Controls Circuit Wiring Schematic

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Fig 6: Fuel Controls Circuit Wiring Schematic

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Fig 7: EVAP Controls Circuit Wiring Schematic

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Fig 8: Controlled/Monitored Subsystem References Circuit Wiring Schematic

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Fig 9: Transmission Control References Circuit Wiring Schematic

Courtesy of GENERAL MOTORS CORP.