Single Module Engine Controller (SMEC)

The SMEC is a digital computer containing a microprocessor. The SMEC receives input from the following sensors: coolant temperature sensor, Manifold Absolute Pressure (MAP) sensor, oxygen sensor, throttle body temperature sensor, Throttle Position Sensor (TPS), and Vehicle Speed Sensor (VSS).

The SMEC also receives input from the following switches: air conditioning clutch switch, brake switch, speed control switches, and neutral safety switch. During operation, the SMEC monitors many of its own input and output circuits. If a fault is detected, the computer will go into limp-in mode and store a trouble code to help in diagnosis of the system.