Output Signals: Notes

WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.

The Powertrain Control Module (PCM) can be directed by a scan tool to operate certain solenoids, valves, motors, and switches. This scan tool function is generally referred to as output controls. The Output Controls can be found under SPECIAL FUNCTIONS menu of the scan tool. Some output controls may be disabled by the PCM during certain types of vehicle operation. Operating a PCM controlled device with the scan tool should be limited to a maximum of ten seconds per test period.

PCM is responsible for the control and operation of many output components. PCM controls many components with an electronic switch called an output driver that completes a ground circuit when turned ON. PCM monitors the output components for the proper response to the PCM commands. Components where functional monitoring is not feasible will be monitored for circuit continuity and out-of-range values if applicable. Output components to be monitored include, but are not limited to the following circuits.