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Home >> Saab >> 1993 >> 900 Base, 2D Hatchback, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Control Units (Except 9000 Series Turbo) >> Automatic Performance Control (APC) ECM
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Automatic Performance Control (APC) ECM

The APC system ECM is located on the upper left side of firewall. It receives signals from a detonation sensor, pressure sensor and ignition system ECM. The APC ECM processes these signals and sends a signal to a solenoid valve at the turbocharger to control optimum boost pressure.

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