Control Unit

The Single Board Engine Controller (SBEC) is a digital computer that controls air/fuel ratio, canister purge, charging system, cooling fan, emission control devices, fuel injector pulse width, idle speed, ignition coil dwell, spark advance and turbocharger wastegate .

The SBEC has a voltage converter that converts battery voltage to regulated 5-volt or 8-volt outputs. The regulated 5-volt output is used to power Manifold Absolute Pressure (MAP) sensor, Throttle Position Sensor (TPS) and logic circuits. The regulated 8-volt output is used to power distributor on all engines except models equipped with Direct Ignition System (DIS). On models with DIS, an 8-volt output is used to power camshaft and crankshaft sensors.