GM Service Manual Online
For 1990-2009 cars only

Scan Tool Output Control

Additional Menu Selection(s)

Description

Cooling Fan 1 Relay

Engine Output Controls

The scan tool displays a Commanded State of None, Off or On. This allows you to communicate with the engine controller and activate or deactivate the cooling fan 1 relay, manually turning the fans On and Off.

Cooling Fan 2 Relay

Engine Output Controls

The scan tool displays a Commanded State of None, Off or On. This allows you to communicate with the engine controller and activate or deactivate the cooling fan 2 relay, manually turning the fans On and Off.