Scan Tool Output Controls

WARNING: This page is about a different car, the 2004 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

Engine Control Module (ECM) Scan Tool Output Controls

Scan Tool Output Control	Additional Menu Selection(s)	Description
Aux Cooling Fan, Export vehicles only	Fan Relays	The scan tool displays a Commanded State of None, Off or On. This allows you to communicate with the PCM and activate or deactivate the auxiliary cooling fan relay, manually turning the auxiliary cooling fan On and Off.
Fan Relay 1	Fan Relays	The scan tool displays a Commanded State of None, Off or On. This allows you to communicate with the PCM and activate or deactivate the cooling fan 1 relay, manually turning the low speed fans On and Off.
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 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.
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 PCM to activate or deactivate the cooling fan 2 relay and the cooling fan 3 relay. This turns On the left cooling fan only to high speed.

HVAC Control Module Scan Tool Output Controls

Scan Tool Output Control	Additional Menu Selection(s)	Description
Display(s) Test	Output Control	the scan tool displays a Commanded State of None, Off, or On. This allows you to communicate with the Instrument Panel Cluster (IPC) and manually turn all segments and LEDs of the IPC On or Off.
Water Pump Relay	Miscellaneous Tests	The scan tool displays a Commanded State of None, Off or On. This allows you to communicate with the HVAC control module, and activate or deactivate the afterboil relay, manually turning the afterboil coolant pump On and Off.