Scan Tool Output Controls
WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
Powertrain Control Module (PCM) 3.4 Liter LA1 Scan Tool Output Control
| Scan Tool Output Control | Additional Menu Selection(s) | Description |
|---|---|---|
| Fans Low Speed | Fan Relays | The scan tool displays a Commanded State of None, Off or On. This allows you to communicate with the powertrain control module (PCM) and activate or deactivate the cooling fan 1 relay, manually turning the low speed fans On and Off. |
| Fans High Speed | Fan Relays | The scan tool displays a Commanded State of None, Off or On. This allows you to communicate with the PCM to activate or deactivate the cooling fan 1 relay, manually turning the low speed fans On. After a 3 second delay the PCM will activate the cooling fan 2 relay and the cooling fan 3 relay. This turns the high speed fans On and Off. |
Engine Control Module (ECM) 3.6L LY7 Scan Tool Output Control
| Scan Tool Output Control | Additional Menu Selection(s) | Description |
|---|---|---|
| Fan Relay 1 | Fan Relays | The scan tool displays a Commanded State of None, Off or On. This allows you to communicate with the electronic control module (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 None, Off or On. This allows you to communicate with the ECM to activate or deactivate the cooling fan 2 and 3 relays, manually turning the medium speed fans On. |
| Fan Relays 1, 2 and 3 | Fan Relays | The scan tool displays a Commanded State of None, Off or On. This allows you to communicate with the ECM to activate or deactivate the cooling fan 1, 2 and 3 relays, manually turning the high speed fans On. |