Logic Module

The logic module is a digital computer containing a microprocessor. The module receives input signals from various switches and sensors. It then computes the fuel injector pulse width, spark advance, ignition coil dwell, idle speed, purge, and cooling fan turn on and alternator charge rate.

The logic module tests many of its own input and output circuits. If a fault is found in a major system, this information is stored in the logic module. Information on this fault can be displayed by using the instrument panel power loss light or by connecting a diagnostic read out and reading a numbered display code which directly relates to a general fault.