Chart 3 Powertrain Ground Check

Chart Number 3:

PCM Circuit:

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

1. G100, located on the right front corner of the engine compartment in front of the battery.

2. G102, located on the right rear corner of the engine block, below and to the right of the rear exhaust manifold.

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

G401 is the ground location for the fuel pump. G100 is the battery ground. G102 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.