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.
SIR Disabling and Enabling: Notes
SIR component location affects how a vehicle should be serviced. There are parts of the SIR system installed in various locations around a vehicle. To find the location of the SIR components refer to SIR Identification Views .
There are several reasons for disabling the SIR system, such as repairs to the SIR system or servicing a component near or attached to an SIR component. There are several ways to disable the SIR system depending on what type of service is being performed. The following information covers the proper procedures for disabling/enabling the SIR system.
| Condition | Action |
|---|---|
| If the vehicle was involved in an accident with an air bag deployment. | Disconnect the negative battery cable(s) *. Refer to Repairs and Inspections Required After a Collision . |
| When performing SIR diagnostics. | Follow the appropriate SIR service manual diagnostic procedure(s) * |
| When removing or replacing an SIR component or a component attached to an SIR component. | Disconnect the negative battery cable(s) * |
| If the vehicle is suspected of having shorted electrical wires. | Disconnect the negative battery cable(s) * |
| When performing electrical diagnosis on components other than the SIR system. | Remove the SIR/Airbag fuse(s) when indicated by the diagnostic procedure to disable the SIR system |
| * DTCs will be lost when the negative battery cable is disconnected. | |
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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.