Inflatable Restraint Passenger Presence System Scan Tool Information

WARNING: This page is about a different car, the 2008 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

The SIR scan tool data list and PPS scan tool data list contain the restraint system related parameters that are available on the scan tool. The column, Data List, indicates the location of the parameter within the scan tool menu selections.

Use the SIR scan tool data list as directed by a diagnostic table or in order to supplement the diagnostic procedures. Begin all of the diagnostic procedures with the Diagnostic System Check - Vehicle . Use the Scan Tool Data Lists after the following is determined:

A diagnostic directs the use of the Data List.
There is no published diagnostic trouble code (DTC) procedure nor published symptom procedure for the customer concern.
The DTC or symptom diagnostic procedure indicated by the diagnostic system check does not resolve the customer concern.

The typical data values are obtained from a properly operating vehicle under the conditions specified in the second row of the scan tool data list table. Comparison of the parameter values from the suspect vehicle with the typical data values may reveal the source of the customer concern.

Passenger Presence System Scan Tool Data List

Parameter	System State	Expected Value	Description
Operating Conditions: Ignition ON/Engine OFF/Driver Seat Belt Buckled/Passenger Seat Belt Unbuckled
Battery Voltage Signal	-	Varies	The scan tool displays 0-20 volts. This is the system voltage measured by the PPS module between the battery input and ground.
Power Mode	-	Run	The scan tool displays the current power mode.
PPS Fault Status	-	No Fault	The scan tool displays the current condition of the PPS system to determine if the SDM or PPS is causing the PPS Disabled condition.
SDM Enable Status	-	Enabled	The scan tool displays the current status of the PPS system within the SDM. When disabled, SDM will default to deactivate the deployment loops related to the passenger airbags. PPS Fault Status and SDM Fault status should match.
PPS Enable Status	-	Disabled	The scan tool displays the current status of the PPS system. This information is sent to the SDM for deactivation of the deployment loops related to the passenger airbags. PPS Enable Status and SDM Enable status should match.
Passenger Classification	-	Empty Seat	The scan tool displays the calculated seat occupant status or need to re-zero.
Passenger Status	-	Varies	The scan tool displays the calculated seat occupant status including relationship to seat position.
Pressure Sensor	-	Varies	The scan tool displays the voltage determined by the weight/position of the seat occupant.
Seat Belt Tension Sensor	-	Varies	The scan tool displays voltage which is used to determine whether a child infant seat is mounted in the passenger seat or not.
Primary Key Status	-	Valid	The scan tool displays the status of the primary key based on the comparison between the SDM and the PPS. If the Status is other than Valid the PPS will not allow activation and should set a DTC.
PPS Primary Key	-	Varies	The scan tool displays primary key that the PPS has stored to memory.
Received Primary Key	-	Varies	The scan tool displays what the PPS received from the BCM as the primary key. The PPS then compares it to what it has stored to determine the Primary Key Status. The PPS Primary Key and Received Primary Key should match.

Passenger Presence System Scan Tool Output Controls

Output Control	Description
Re-Zero Passenger Presence System	The passenger presence system (PPS) is a calibrated system that requires rezeroing anytime the seat cushion trim attachments have been removed or the PPS has been replaced.