Powertrain Ground Check

Refer to Power and Ground Distribution for ground locations.


Circuit Description
There are several vehicle grounds that are essential for proper powertrain system operation. Loose or poor ground connections may cause widely varying problems, from flickering telltales to PCM DTC's to driveability problems. The Powertrain Ground Check should be performed when referred to by other diagnostics or when erratic or intermittent problems defy traditional diagnosis. The Powertrain Ground Check chart lists these grounds and other pertinent information that will allow you to investigate a possible loose or faulty ground connection.