Airbag control unit with part number 285015091

What is the function of Airbag Control Unit 285015091?

The airbag control unit with part number 285015091 is the central control module for the occupant safety system (SRS) in the Mitsubishi ASX of the GA series. It processes data from the acceleration sensors and, in the event of a crash, determines whether to activate the airbags and seatbelt pretensioners.

This module is specifically designed for the Mitsubishi ASX (GA), produced from 2010 onwards, ensuring the proper functioning of all passive safety components. Error-free communication between the control unit and its connected sensors and actuators is crucial for vehicle safety.

In practice, alternative part numbers are also known for this control unit, which are functionally identical. These include numbers 8635A215, 8635A569, 8635A321, as well as 285011550. Compatibility among these variants is generally assured.

Why does control unit 285015091 fail?

Malfunctions in control unit 285015091 often manifest as stored internal fault codes such as B1557 or B1412. Common causes include not only the storage of crash data after an accident but also physical issues in peripheral components, such as damaged wiring, faulty connections, or loose plug-in connectors to the SRS system.

A key task during repair is clearing the stored crash data that locks the control unit after a collision. These records prevent re‑activation and must be professionally reset so the unit can return to full functionality.

In some cases, the root cause lies not directly in the control unit itself but in external wiring. Broken or damaged cables connecting the module to airbag sensors or other SRS components can lead to malfunctions mistakenly attributed to the control unit.

Loose or corroded connectors are another frequent source of failure. Thorough diagnostics at a workshop are therefore essential to determine whether the problem resides in the control unit or in the vehicle’s wiring harness.

How do you recognize a defect in control unit 285015091?

A defective airbag control unit of type 285015091 primarily shows itself through the permanently illuminated or intermittently flashing airbag warning light on the instrument cluster. Additionally, error messages may appear on the vehicle’s display indicating a problem with the restraint system.

The most obvious sign is the airbag warning light. Normally, it briefly illuminates upon starting the engine and then goes out. If it remains constantly lit or flashes, this indicates an active fault in the system that requires immediate inspection.

Another symptom may be the inability to access the control unit via the diagnostic interface (OBD). While this complicates troubleshooting for workshops, it often points to a serious internal defect within the module.

Since a defective airbag control unit disables the vehicle’s entire passive safety system, prompt examination by a qualified workshop is absolutely necessary when these symptoms occur. In the event of a crash, airbags and seatbelt pretensioners would either fail to deploy or deploy incorrectly.

In which vehicles is 285015091 installed?

The airbag control unit with part number 285015091 is specifically used in the Mitsubishi ASX of the GA series. This model has been in production since 2010. At Airbag24, repairs cover this vehicle model as well as functionally identical control units bearing alternative part numbers.

At Airbag24, control unit 285015091 is expertly refurbished for the following model:

Mitsubishi ASX (GA series, manufactured from 2010 onward)

The repair process also includes compatible variants with part numbers 8635A215, 8635A569, 8635A321, and 285011550, which are likewise found in this vehicle series.

How is the repair of control unit 285015091 carried out?

At Airbag24, the repair of control unit 285015091 follows a standardized procedure. Upon submission, a detailed electronic diagnosis is performed to precisely locate the fault. Subsequently, crash data is erased, defective components replaced, and the unit finally calibrated and tested.

First, a diagnostic check should be conducted in the vehicle to rule out external sources of malfunction, such as wiring issues. Once the defect is confined to the control unit, it is removed and sent to Airbag24.

Our technicians perform an initial inspection, reading the fault memory and visually examining the unit for any visible damage. The core of the repair involves erasing stored crash data and thoroughly checking all relevant electronic components.

If further component defects are detected during the analysis, they will be professionally replaced. Following successful repair, the system is recalibrated and undergoes a comprehensive functional test.

Airbag24 provides 2 years' statutory liability for defects on all repairs performed and replaced components, ensuring that the functionality matches that of a new part.