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AV-SCANNER / Service function guides / Body and comfort
This guide gives working mechanics and serious DIY owners a complete, practical procedure for diagnosing and repairing a seat belt pretensioner warning, from understanding the restraint control module's self-test to clearing the fault and verifying the repair. It covers system operation, safe depowering and component replacement, cross-vehicle differences, and the checks that prove the fix before the car goes back on the road. You will be able to read the warning correctly, isolate the fault to a component or circuit, and perform the repair without triggering a deployment or leaving a latent code behind.
Guidance is general and covers many makes. Exact procedures and values vary by model, so confirm them in the factory service information for your vehicle.
Download all 12 sections as a branded PDF to use in the workshop.
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