Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Inflatable Restraint Vehicle Rollover Sensor Scan Tool Information
2009 Chevrolet Tahoe Base, 4.8 CSECTION Inflatable Restraint Vehicle Rollover Sensor Scan Tool Information
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Rollover Sensor Scan Tool Data Parameters
| Parameter | System State | Expected Value | Description |
|---|---|---|---|
| Operating Conditions: Ignition ON | |||
| Average Speed | - | Varies | This displays km/h (mph). This is the average speed of the vehicle. |
| Battery Voltage Signal | - | Varies | This displays volts. This is the voltage input supplied to the rollover sensor. |
| Current Power Mode | - | Run | The scan tool displays Off, Accessory, Run or Crank Request. This is the state of the ignition switch. |
| Engine Virtual Device | - | Present | The scan tool displays Present or Not Present. |
| Primary Key Status | - | Valid | The scan tool displays Unknown, Valid or Invalid. This is the state of the primary key. |
| Received Primary Key | - | Varies | The scan tool displays the primary key received. |
| ROS Occupant Containment Req. | - | Enable | The scan tool displays Reserved, Disable or Enable. |
| ROS Primary Key | - | Varies | The scan tool displays the ROS primary key. |
| SDM Occupant Containment Status | - | Enabled | The scan tool displays Disabled or Enabled. |
| Vehicle Speed Status | - | Valid | The scan tool displays Valid or Invalid. This is the state of the vehicle speed. |
Supplemental Inflatable Restraint Scan Tool Output Controls
| Output Control | Description |
|---|---|
| Setup New ROS | This procedure should be used after a new rollover sensor has been installed. |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.