A scan tool can read and sometimes clear SRS (Supplemental Restraint System) codes. However, simply erasing the code doesn’t fix the underlying problem. If a fault still exists within the SRS system, the light will likely reappear. A scan tool is essential for diagnosing the issue, identifying the faulty component (like a sensor or seat belt pretensioner), and verifying the repair. After the necessary repairs, a scan tool can then be used to clear the codes and confirm the system is functioning correctly.
For example, a vehicle involved in an accident might have deployed seat belt pretensioners. While a resistor could be used to bypass the SRS module and suppress the warning light, this is a dangerous and illegal practice. It masks a serious safety issue. A proper fix involves replacing the entire affected seat belt assembly. A scan tool will reveal the specific code related to the pretensioner and, after replacement, confirm the issue is resolved.
In another instance, a seat belt might be throwing a code but seemingly functioning normally. Further investigation with a scan tool could reveal an intermittent fault or a pending problem. Attempting to clear the code without addressing the root cause is ineffective. Eventually, the problem will worsen, potentially leading to system malfunction or even lock-up.
Dealerships and qualified mechanics utilize professional-grade scan tools to accurately diagnose SRS issues. These tools provide detailed information about the fault codes, allowing technicians to pinpoint the problem area and perform the necessary repairs. While some less expensive scan tools might be able to clear basic SRS codes, they may not have the capability to diagnose complex issues or access all the necessary system data. Ultimately, using a scan tool is crucial for understanding and resolving SRS problems, but simply erasing codes without fixing the underlying issue offers no long-term solution.
