Scan Tool Data Definitions

WARNING: This page is about a different car, the 2006 Chevrolet Monte Carlo and 2006 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.

Use the scan tool data display values and definitions information in order to assist in diagnosing vehicle malfunctions. Compare the vehicles actual scan tool data with the typical data display value table information. Use the information in order to aid in understanding the nature of the concern when the vehicle data does not match the typical data display values.

The scan tool data values were taken from a known good vehicle under the following conditions:

The ignition switch is in the ON position.
The engine is not running.
The vehicle is in PARK.

Accy. Relay Command: The scan tool displays the commanded state of the RAP relay. The scan tool displays ON when the BCM provides ground to the RAP relay control circuit.
Battery Voltage Signal: This parameter displays the amount of battery voltage available to the body control module (BCM).
Crank Voltage: This parameter displays the voltage read by BCM, through Ignition Off/Run/Crank signal. For the values expected refer to Power Mode Mismatch .
Driver Door Ajar Sw.: This parameter displays the status of the door.
Ignition Accessory: The BCM uses this data in order to determine the position of the ignition switch. Active is displayed when the ignition switch is in the Run or Accy positions.
Ignition 1 Run/Crank: The BCM uses this data in order to determine the position of the ignition switch. Active is displayed when the ignition switch is in the Run or Crank positions.
Ignition 3: The scan tool displays the state of the Ignition 3 output.
Ign. Off/Run/Crank: The BCM uses this data in order to determine the position of the ignition switch. Active is displayed when the ignition switch is in the Off, Run or Crank positions.
Passenger Door Ajar Sw.: This parameter displays the status of the door.