SIR scan tool data definitions

WARNING: This page is about a different car, the 2007 Chevrolet Monte Carlo and 2007 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.

Battery Voltage Signal: The scan tool displays 0-20 volts. This is the system voltage measured by the SDM between the battery input and ground.
Driver Seat Belt Switch: The scan tool displays whether the driver seat belt is buckled or unbuckled.
Driver Seat Belt Type: The scan tool displays whether the driver seat uses a switch or a sensor for the seat belt buckle.
Driver Seat Position Sensor: The scan tool displays whether the driver seat is in the Forward or Rearward position to determine if the airbag should activate single or dual stage deployment as necessary
Passenger Seat Belt Switch: The scan tool displays whether the passenger seat belt is buckled or unbuckled.
Primary Key Status: The scan tool displays the status of the primary key based on the comparison between the BCM and the SDM. If the Status is other than Valid the SDM will not allow activation and should set a DTC.
Psgr. Seat Belt Sensor: The scan tool displays whether the passenger seat belt is buckled or unbuckled.
Psgr. Seat Belt Type: The scan tool displays whether the passenger seat uses a switch or a sensor for the seat belt buckle.
Psgr. Seat Position Sensor: The scan tool displays whether the passenger seat is in the Forward or Rearward position to determine if the airbag should activate single or dual stage deployment as necessary
Received Primary Key: The scan tool displays what the SDM received from the BCM as the primary key. The SDM then compares it to what it has stored to determine the Primary Key Status. The SDM Primary Key and Received Primary Key should match.
Received VIN Digits 2-5: The scan tool displays the Secondary Key which includes digits 2 though 5 of the VIN that the BCM sends to the SDM.
Received VIN Digits 6-7: The scan tool displays the Secondary Key which includes digits 6 and 7 of the VIN that the BCM sends to the SDM.
Run/Crank: The scan tool displays the current power mode of the SDM.
SDM Primary Key: The scan tool displays primary key that the SDM has stored to memory.
Secondary Key Status: The scan tool displays whether the Secondary Key is valid or invalid. This determines if the VIN stored in SDM memory matches what is stored in the BCM.
SIR Warning Indicator: The scan tool displays whether the SIR warning indicator has been requested ON or OFF.