GM Service Manual Online
For 1990-2009 cars only

Engine Control Module (ECM) Scan Tool Output Controls

Scan Tool Output Control

Additional Menu Selection(s)

Description

Fan Control 1 Command

General Info Outputs

The scan tool displays a Commanded State of On or Off. This allows you to communicate with the ECM and activate or deactivate the cooling fan relay, manually turning the fans On and Off.

Fan Control 2 Command

General Info Outputs

The scan tool displays a Commanded State of On or Off. This allows you to communicate with the ECM and activate or deactivate the cooling fan relay, manually turning the fans On and Off.