For 1990-2009 cars

### Passenger Presence System Scan Tool Data Parameters

Parameter | Operating Conditions | Expected Value | Definition
--- | --- | --- | ---
Operating Conditions: Ignition is ON, engine OFF, and vehicle is stationary.
Battery Voltage | -- | Volts | This is the voltage input supplied to the passenger presence system.
Passenger Presence Classification | -- | Empty | The scan tool displays Unknown, Empty, Child, Small Adult, or Large Adult. This is the state of what occupies the passenger seat, as monitored by the passenger presence system.
Passenger Presence Detection | -- | Empty | The scan tool displays Unknown, Empty, or Occupied. This is the state of the passenger seat if it is occupied or empty as monitored by the passenger presence system.
Passenger Presence Detection System Status | -- | No Fault | The scan tool displays No Fault, Plant Mode, Fault Mismatch, or Fault Barrier. This is the internal status of the operating mode of the passenger presence system.
Passenger Seat Belt Status | -- | Unbuckled | The scan tool displays Buckled or Unbuckled. This is the state of the seat belt switch in the seat belt buckle.
Primary Key Status | -- | Valid | The scan tool displays Unknown, Valid or Invalid. This is the state of the primary key programmed in the passenger presence system module.
Power Mode | -- | Accessory | The scan tool displays Off, Accessory, Run or Crank Request. This is the state of the ignition switch.