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Single Board Engine Controller (SBEC)

SBEC is a digital computer that controls ignition timing, air/fuel ratio, emission control devices, cooling fan, charging system, idle speed, cruise control (if equipped), fuel pump and tachometer. The control unit is located in the engine compartment. SBEC uses data from various input sources to control output devices in order to achieve optimum engine performance for all operating conditions.

SBEC has voltage converters that convert battery voltage to regulated 5-volt and 8-volt outputs. The 8-volt output powers the distributor pick-up and crankshaft (angle/position) sensor. The 5-volt output powers coolant temperature sensor, charge temperature sensor, manifold absolute pressure sensor and throttle position sensor.

NOTE: Basically, components are grouped into 2 categories. The first category, INPUT DEVICES, includes components that control or produce voltage signals monitored by the SBEC. The second category, OUTPUT SIGNALS, includes components controlled by the SBEC (this is accomplished by the SBEC grounding individual circuits).
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