Airbag control unit with part number 285013238

What is the function of Airbag Control Unit 285013238?

The airbag control unit with part number 285013238 is the central control module for the Occupant Restraint System (SRS) in the Hyundai i30 of the PD generation. It processes signals from crash sensors and, within milliseconds, determines whether to deploy airbags and seatbelt pretensioners to protect occupants during a collision.

As a safety-critical component, this ECU continuously monitors all elements of the airbag system, including the various airbags, seatbelt pretensioners, seat occupancy mats, and external acceleration sensors distributed throughout the vehicle. Any irregularity in the system is immediately detected and signaled to the driver via the SRS warning light on the instrument panel.

The primary task of control unit 285013238 is to analyze sensor data upon impact and, based on the severity of the crash, activate the appropriate restraint devices. After deployment, it also stores so‑called crash data, which prevents reactivation without professional intervention.

Why does control unit 285013238 fail?

The most common causes of failure for control unit 285013238 are stored crash data following an accident, as well as internal electronic defects on the circuit board. These range from faulty SMD components and power supply issues to internal communication errors within the device itself.

After an accident in which airbags or seatbelt pretensioners have deployed, the control unit permanently stores crash data—a safety measure that prevents reuse without proper inspection. This data cannot be erased using standard diagnostic tools and results in a persistently illuminated airbag warning light.

Internal hardware defects are another frequent cause. Often, error code B1620 (internal fault) is logged in the fault memory. The technical reasons can vary widely, including blown SMD components, cold solder joints, or damaged traces. Failures of key modules such as PNP, PLL, or flash memory chips can also lead to complete loss of communication.

A specific hardware issue involves the internal power supply. Error code B1102 (voltage/power supply too low) directly points to such a problem. Common causes include defective voltage regulators or aged capacitors on the board that can no longer reliably provide the necessary operating voltage to the microcontrollers.

How do you recognize a defect in control unit 285013238?

Typical symptoms of a faulty airbag control unit 285013238 include a constantly illuminated SRS or airbag warning light on the dashboard and a lack of communication between the workshop’s diagnostic tool and the control unit. Additionally, specific error codes such as B1102 or B1620 may be read out.

The clearest indication for the driver is the persistently lit airbag warning light. It does not turn off after starting the vehicle, signaling a serious fault in the safety system that requires immediate attention.

In the workshop, a severe defect often manifests as the control unit becoming unresponsive. A diagnostic tool cannot establish a connection to read the fault memory. This complete loss of communication usually indicates a major internal hardware failure.

If communication remains possible, extracted error codes provide precise clues. Codes like B1102 (low voltage supply) or B1620 (internal fault) confirm a defect directly within the control unit, largely ruling out issues with external components such as sensors or wiring.

In which vehicles is control unit 285013238 installed?

The airbag control unit with part number 285013238 is specifically used in various trims and model years of the third-generation Hyundai i30 (PD). Our repair services cover the entire model range, from early production vehicles to the latest facelifted versions.

At Airbag24, we service part number 285013238 for the following Hyundai models:

Hyundai i30 PD (model years 2017–2020)

Hyundai i30 PD First Facelift (model years 2020–2024)

Hyundai i30 PD Second Facelift (from model year 2024 onward)

How is control unit 285013238 professionally repaired?

A professional repair of control unit 285013238 involves thorough electronic diagnostics followed by targeted restoration. This may include resetting stored crash data or replacing defective SMD components on the circuit board by specialized technicians.

At Airbag24, repairs follow a proven and secure process. Before removing the unit, external potential sources of failure—such as fuses and connectors—should always be inspected, and the fault memory read out. A diagnostic report detailing exact error codes is essential for a focused repair.

Upon arrival, the control unit undergoes a thorough analysis. If it contains stored crash data, the device is restored to its factory settings. For electronic faults, repairs are performed at the component level. Defective SMD components, capacitors, or voltage regulators are replaced with high-quality new parts, and any broken traces are professionally repaired.

After hardware repair, re-coding or initialization may be required in some cases to ensure the control unit communicates flawlessly with the vehicle again. Finally, each unit undergoes a comprehensive functional test on a specialized test bench to verify the proper operation of all system areas.

We provide a 12-month warranty on all repairs.

What shipping options does Airbag24 offer?

Airbag24 offers flexible shipping and processing options for your repair. You can send your defective control unit free of charge yourself, or take advantage of our convenient UPS pickup service. Returns are also handled quickly and reliably via UPS, either as free standard shipping or as an express option.

For the outbound shipment, you can pack the control unit securely and send it to us yourself, or arrange a paid UPS pickup from your preferred location.

For returns, several free and paid options are available:

UPS standard shipping is free of charge. For faster delivery, you can choose UPS express shipping. Both options are also available with cash-on-delivery. Alternatively, you can pick up the repaired unit in person at our facility.