The SIR Scan Tool Data Definitions contain a brief description of all SIR related parameters available on the scan tool. The list is in the order it appears on the scan tool.

Ignition: The scan tool displays 0-25.5 Volts. The Ignition represents the system voltage measured by the SDM at its ignition feed.

Driver Senselo: The scan tool displays 0-20 Volts. The SDM measures the voltage of the driver frontal low terminal voltage and displays it as Driver Senselo.

Passenger Senselo: The scan tool displays 0-20 Volts. The SDM measures the voltage of the passenger frontal low terminal voltage and displays it as Passenger Senselo.

Driver VDIF: The scan tool displays 0-500 Millivolts. The SDM measures the difference between driver frontal high and driver frontal low to determine voltage differential.

Passenger VDIF: The scan tool displays 0-500 Millivolts. The SDM measures the difference between passenger frontal high and driver frontal low terminals to determine voltage differential.

Driver Energy Reserve: The scan tool displays 0-30 Volts. The SDM measures the voltage of the driver frontal energy reserve capacitors inside the SDM and displays it as Driver Energy Reserve.

Passenger Energy Reserve: The scan tool displays 0-30 Volts. The SDM measures the voltage of the passenger frontal energy reserve capacitors inside the SDM and displays it as Passenger Energy Reserve.

Warning Lamp ON Time: The scan tool displays 0-182 Hours. The SDM measures the continous warning lamp on time.

Ignition Cycles Lamp ON: The scan tool displays 0-125 Cycles. The ignition cycles with the warning lamp ON.

Ignition Cycles Lamp OFF: The scan tool displays 0-125 Cycles. The ignition cycles with the warning lamp OFF.

Seatbelt Status: The scan tool displays Buckled or Unbuckled. The SDM receives a discrete signal from the seat belt switch at SDM terminal 1. The SDM sends the seat belt message status over the Class 2 Serial Data Line.