GM Service Manual Online
For 1990-2009 cars only

Powertrain Control (LNJ/3.4L) Scan Tool Output Controls

Scan Tool Output Control

Additional Menu Selection(s)

Description

Fans Low Speed

Engine Outputs

The scan tool displays a commanded state of On or Off. This allows you to communicate with the PCM and activate or deactivate the cooling fan relay, manually turning the fan On and Off.

Fans High Speed

Engine Outputs

The scan tool displays a commanded state of On or Off. This allows you to communicate with the PCM and activate or deactivate the cooling fan relays, manually turning the fans On and Off.