Scan Tool Data Definitions

WARNING: This page is about a different car, the 2007 Saturn Ion Red Line, 2007 Saturn Ion 3, and 2007 Saturn Ion 2. However, it is still accessible from the selected car via links, so may be relevant.

A/C Disengage Reason: The scan tool displays one of the following reasons why the ECM/PCM has disengaged the a/c compressor; None, System Voltage, WOT, CKP, Learn Active, Engine Run Time, Coolant Hot, Anti Stall, A/C Pressure, Engine Speed, Trans Engine Speed, A/C Pressure Sensor, Low Voltage, High Voltage, Outside Air, Temp, A/C Switched Off.
A/C High Side Pressure Sensor: The scan tool displays 0-2951 kPa (0-428 psi). The voltage applied to the ECM/PCM input from the A/C refrigerant pressure sensor is converted to a pressure value.
A/C High Side Pressure Sensor: The scan tool displays 0-5 volts. The voltage applied to the ECM/PCM input for the A/C refrigerant pressure sensor.
A/C Off for WOT: The scan tool displays the high throttle disable of the a/c compressor.
A/C Pressure Disable: The scan tool displays the status of the a/c high side pressure sensor. The scan tool displays YES/NO.
A/C Relay Command: The scan tool displays On/Off. The scan tool displays the control decision for the compressor clutch relay output as determined by the ECM/PCM.
A/C Relay Circuit Status: The scan tool displays the following message stating the history status of the a/c relay control circuit. The scan tool displays OK/Fault
A/C Request Signal: The scan tool displays Yes/No. The scan tool displays Yes when the ECM/PCM receives a message to engage the A/C compressor clutch. The scan tool displays No when the ECM/PCM receives a message to disengage the A/C compressor clutch.
A/C Switch: The scan tool displays On/Off. The a/c request switch shows current status of the a/c request switch function on the BCM.
ECT Sensor: The scan tool displays -40 to +215°C (-40 to +419°F). The voltage applied to the ECM/PCM input from the engine coolant temperature sensor is converted to a temperature value.
Ignition 1 Signal: The scan tool shows available voltage at the ECM/PCM. The scan tool displays 0-12 volts.
Outside Air Temp Sensor: The voltage applied to the BCM input for the outside air temperature sensor. The scan tool displays 0-5 volts.