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Home >> Volvo >> 1995 >> 850 Base, 4D Sedan, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation - Non-Turbo >> Computerized Engine Controls >> Control Units

Control Units

Electronic Control Units (ECUs) provide precise control of fuel and ignition. Each system has self-diagnostic capabilities.

850 non-turbo models use separate ECUs for fuel injection and ignition control, located in right front of engine compartment.

NOTE: Components are grouped into 2 categories. The first category is INPUT DEVICES, which are components that control or produce voltage signals monitored by control unit. The second category is OUTPUT SIGNALS  , which are components controlled by control unit.
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