Single Module Engine Controller (SMEC)

SMEC is a digital computer containing a microprocessor. The module receives input signals from various switches and sensors. After computing input data, SMEC sends output signals to the fuel injectors, ignition coil, AIS motor, purge solenoid, alternator and cooling fan switch.

SMEC also performs self-diagnostic functions. This diagnostic information is stored as trouble codes. Trouble codes can be retrieved by a technician using a bi-directional scan tool, or by means of the instrument panel check engine light.