For 1990-2009 cars

#### Engine Control Module (ECM) Scan Tool Output Controls

Scan Tool Output Control | Additional Menu Selection(s) | Description
--- | --- | ---
Fan Relay 1 | Fan Relays | The scan tool displays a Commanded State of OFF or ON. This allows you to communicate with the ECM and activate or deactivate the cooling fan 1 relay, manually turning the low speed fans ON and OFF.
Fan Relays 2 and 3 | Fan Relays | The scan tool displays a Commanded State of OFF or ON. This allows you to communicate with the ECM to activate or deactivate the cooling fan 2 relay and the cooling fan 3 relay. This turns the high speed fans ON and OFF.
Fan Relays 1, 2 and 3 | Fan Relays | The scan tool displays a commanded state of OFF or ON. This allows you to communicate with the ECM to activate or deactivate the cooling fan 1 relay, manually turning the low speed fans ON. After a 3 second delay the ECM will activate the cooling fan 2 relay and the cooling fan 3 relay. This turns the high speed fans ON and OFF.