Chart 3 Powertrain Ground Check

Chart 3:

PCM Circuit:

CIRCUIT DESCRIPTION
Three vehicle grounds are essential for proper powertrain system operation. They are:

1. G301, located on the upper portion of the right hand kick panel;

2. G104, located on lower right hand front of engine, right of starter motor;

and

3. G401, located on the front side of the left rear seat diagonal brace.

G401 is the ground location for the fuel pump. G104 is the cooling fan and A/C compressor clutch ground. G301 is the ground for all powertrain electronics including the Powertrain Control Module (PCM).

Loose or poor ground connections may cause widely varying problems, from flickering telltales to PCM codes to several driveability problems. The Powertrain Ground Check should be performed when referred to by other diagnostics or when erratic or intermittent problems defy traditional diagnosis.