Scan Tool Data Definitions

WARNING: This page is about a different car, the 2003 Saturn LW300, 2003 Saturn LW200, 2003 Saturn L300, and 2003 Saturn L200. However, it is still accessible from the selected car via links, so may be relevant.

The HVAC Scan Tool Data Definitions contain a brief description of all the scan tool parameters. This list is in alphanumeric order.

A/C High Side Pressure: The scan tool displays -103 to +3119 kPa (-14 to +452 psi). This parameter represents the A/C refrigerant pressure sensor voltage signal converted to pressure.

A/C High Side Pressure Sensor: The scan tool displays 0.00-5.00 Volts. This parameter represents the A/C refrigerant pressure sensor signal.

A/C Request: The scan tool displays Yes or No. The PCM uses the A/C request signal in order to determine if A/C compressor operation is being requested by the HVAC control module.

A/C Relay Circuit Short to Volts: The scan tool displays Yes or No. Yes is displayed if the A/C relay control circuit is shorted to voltage.

A/C Relay Circuit Open or Short to Ground: The scan tool displays Yes or No. Yes is displayed if the A/C relay control circuit is open or shorted to ground.

A/C Relay Command: The scan tool displays On or Off. Represents the PCM commanded state of the A/C compressor clutch relay. The A/C compressor clutch should be engaged when Commanded A/C displays On.

Auto Switch - Actual: The scan tool displays High or Low. When the AUTO button is pressed the scan tool displays High. When released, the scan tool displays Low.

Auto Switch Command: The scan tool displays On or Off. On is displayed when the HVAC control module is in Auto Mode.

Defrost Switch - Actual: The scan tool displays High or Low. When the Defrost button is pressed the scan tool displays High. When released, the scan tool displays Low.

Defrost Switch Command: The scan tool displays On or Off. On is displayed when the Defrost is selected.

Defrost LED: The scan tool displays On or Off. The state of the Defrost LED.

Economy Switch - Actual: The scan tool displays High or Low. When the Economy button is pressed the scan tool displays High. When released, the scan tool displays Low.

Economy Switch Command: The scan tool displays On or Off. On is displayed when the Economy is selected.

Fan Speed: This data indicates the blower motor speed value as a Counts.

Mix Feedback: This data indicates the actual air mix door position.

Mode Switch - Actual: The scan tool displays High or Low. When the Mode button is pressed the scan tool displays High. When released, the scan tool displays Low.

Mode Switch Command: The scan tool displays On or Off. On is displayed when the a Mode is selected.

Mode Feedback: This data indicates the actual air Mode door position.

Off Switch - Actual: The scan tool displays High or Low. When the Off button is pressed the scan tool displays High. When released, the scan tool displays Low.

Off Switch Command: The scan tool displays On or Off. On is displayed when the Off is selected.

Outside Air Temperature: The scan tool displays 0 to 255 counts (0 to 5 volts). The status of the sensor signal circuit is monitored. 0 counts indicates a short to ground, 255 counts indicates an open circuit.

Passenger Compartment Temperature: The scan tool displays 0 to 255 counts (0 to 5 volts). The status of the sensor signal circuit is monitored. 0 counts indicates a short to ground, 255 counts indicates an open circuit.

Rear Defrost Switch - Actual: The scan tool displays High or Low. When the Rear Defrost button is pressed the scan tool displays High. When released, the scan tool displays Low.

Rear Defrost Switch Command: The scan tool displays On or Off. On is displayed when the Rear Defrost is selected.

Rear Defrost Feedback: The scan tool displays High or Low. When the Rear Defrost is On the scan tool displays High.

Recirculation LED: The scan tool displays On or Off. The state of the Recirculation LED.

Recirculation Switch Command: The scan tool displays On or Off. On is displayed when the Recirculation is selected.

Sun Load Sensor: The scan tool displays 0 to 255 counts. The signal output from the Sun Load Sensor.