Airbag control unit with part number 95910-02200-68HC05B32

What is the function of the airbag control unit 95910-02200-68HC05B32?

The airbag control unit 95910-02200-68HC05B32, also known as the SRSCM (Supplemental Restraint System Control Module), is the central control unit for the occupant protection system in the Hyundai Atos MX. It processes sensor signals to deploy airbags and seatbelt pretensioners in the event of a crash and continuously monitors system integrity.

This specific control unit is used in the Hyundai Atos MX models from 1997 to 2002. Its primary task is the ongoing monitoring of all components of the airbag system, from impact sensors to the airbag ignition circuits.

At the heart of the device operates a 68HC05B32 microcontroller. This chip is responsible for processing data and storing system information, including fault codes and, in the event of a crash, crash data.

Why does the control unit 95910-02200-68HC05B32 fail?

The most common causes of failure for the control unit 95910-02200-68HC05B32 are internal hardware defects and stored crash data that lock the system. Defective electronic components such as capacitors, resistors, or the microcontroller itself often lead to total failure, indicated by error code B1620.

A typical defect is an internal hardware failure that occurs without any external impact or accident. This frequently results in the permanent storage of error code B1620, signaling an irreparable internal fault, though it can be resolved through component-level repair.

Another common cause of malfunction is stored crash data. Even without an actual collision, faulty signals or voltage spikes can cause the control unit to register an impact and lock up. This condition is irreversible until the data is professionally reset.

Short circuits in the ignition circuit, indicated by error code B1348, also point to a problem within the control unit. Additional causes may include moisture damage, broken wiring, or defective connectors. Similar issues can occur with related part numbers such as 95910-02000 or 95910-05600 for Atos models.

How do you recognize a defect in the 95910-02200-68HC05B32?

A defect in the control unit 95910-02200-68HC05B32 primarily manifests as the airbag warning light remaining constantly illuminated on the instrument panel. Additionally, it is often no longer possible to access the control unit with a diagnostic tool or clear stored fault codes such as B1620.

The clearest indication is the active airbag warning light. It fails to turn off after starting the vehicle, signaling a serious, safety-relevant system fault that requires immediate inspection.

Another clear symptom is complete communication failure. If a workshop attempts to read the fault memory, the diagnostic tool receives no response from the airbag control unit, making OBD-based fault diagnosis impossible.

Even when communication is possible, certain fault codes cannot be cleared. In particular, error B1620 (internal hardware defect) or locked crash data permanently block the system until proper repair or a reset is performed.

In which vehicles is the control unit 95910-02200-68HC05B32 installed?

The airbag control unit with part number 95910-02200-68HC05B32 is specifically designed for the Hyundai Atos compact car. At Airbag24, we repair this control unit for Hyundai Atos MX models produced between 1997 and 2002, as well as for the related Atos Prime MX.

This component was developed specifically for the first generation of the Hyundai Atos. Therefore, compatibility is limited to the following models:

Hyundai: Atos MX (1997–2002)

How does repair work at Airbag24?

At Airbag24, repairing the control unit 95910-02200-68HC05B32 follows a standardized process. After removal and submission, the unit undergoes a detailed analysis to locate hardware faults and identify crash data. Defective components are then replaced, and the software is reset.

The process ideally begins with a diagnosis at your workshop to confirm that the issue lies within the control unit. Following removal, please send the unit along with the completed repair form to us.

At our technical center, the control unit is first inspected. Our technicians directly read the fault memory on the device and analyze the hardware for defective components, such as the 68HC05B32 microcontroller or other parts.

The actual repair involves replacing faulty electronic components and professionally resetting the stored crash data from the memory chip. This procedure restores the device’s full functionality.

Finally, the control unit is tested on a test bench to verify proper functionality. We provide 2 years' statutory liability for defects on every repair.