Scan Tool Output Controls. Chevrolet Joy 2008

For 1990-2009 cars

Scan Tool Output Control | Additional Menu Selection(s) | Description
--- | --- | ---

Fan Low

Special functions/Engine Output Control/Cooling Fan

This function operates the engine cooling fan at low speed by enabling the fan low speed relay. The normal commanded state of the relay is None. When commanded ON/OFF, both cooling fans turn ON/OFF. The system remains in the commanded state until cancelled by the scan tool. The ECM allows relay control when the following conditions are met:

• | The ignition is ON, with the engine OFF.

• | The transmission must be in Park or Neutral.

• | The A/C request is OFF.

• | The engine coolant temperature is less than a predetermined value.

Fan High

Special functions/Engine Output Control/Cooling Fan

This function operates the engine cooling fan at high speed by enabling the fan high speed relay. The normal commanded state of the relay is None. When commanded ON/OFF, the cooling fan turns ON/OFF. The system remains in the commanded state until cancelled by the scan tool. The ECM allows relay control when the following conditions are met:

• | The ignition is ON, with the engine OFF.

• | The transmission must be in Park or Neutral.

• | The A/C request is OFF.

• | The engine coolant temperature is less than a predetermined value.