Inflatable Restraint Sensing & Diagnostic Module 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.
SIR 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 SDM between the battery input and ground. |
| Deployment Loop 1-11 | - | Disabled | The scan tool displays Disabled or Enabled. This is the state of the SIR deployment loops 1-11 |
| Deployment Loop 1-11 | - | Not Learned | The scan tool displays Learned or Not Learned. This is the status of the SIR deployment loops 1-11. |
| Driver Seat Belt Switch | - | Buckled | The scan tool displays whether the driver seat belt is buckled or unbuckled. |
| Driver Seat Belt Type | - | Switch | The scan tool displays whether the driver seat uses a switch or a sensor for the seat belt buckle. |
| Driver Seat Position Sensor | - | Varies | If the vehicle is equipped with a 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. |
| Loop 1-11 Type | - | Not Used | The scan tool displays Not Used, LF Stage1, RF Stage 1, LF Stage 2, RF Stage 2, LF Preten, RF Preten, LF Sidebag, RF Sidebag, Lt. Roof Stage 1, Rt. Roof Stage 1, Lt. Roof Stage 2, Rt. Roof Stage 2, Lt. Roof Stage 3, Rt. Roof Stage 3. This is the state of the SIR loops 1-11. |
| Psgr. Seat Belt Sensor | - | Varies | The scan tool displays whether the passenger seat belt is buckled or unbuckled. |
| Passenger Seat Belt Switch | - | Unbuckled | The scan tool displays whether the passenger seat belt is buckled or unbuckled. |
| Primary Key Status | - | Valid | 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 Type | - | Sensor | The scan tool displays whether the passenger seat uses a switch or a sensor for the seat belt buckle. |
| Psgr. Seat Position Sensor | - | Varies | If the vehicle is equipped with a passenger 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 | - | Varies | 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 | - | Varies | 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 | - | Varies | 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 | - | Active | The scan tool displays the current power mode of the SDM. |
| SDM Primary Key | - | Varies | The scan tool displays primary key that the SDM has stored to memory. |
| Secondary Key Status | - | Valid | 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 | - | Off | The scan tool displays whether the SIR warning indicator has been requested ON or OFF. |