Airbag control unit with part number YS6T-14B056-AC

What is the function of the airbag control unit YS6T-14B056-AC?

The airbag control unit YS6T-14B056-AC is the central control module (SRM) of the occupant protection system in the Ford Puma Mk2 (from 2019 onwards). It processes data from crash sensors and determines whether to deploy airbags and seatbelt pretensioners, thereby protecting vehicle occupants in the event of a collision.

As an official OEM control unit from Ford, it carries the part number YS6T-14B056-AC, which can also be found on the housing in the forms YS6T 14B056 AC or YS6T14B056AC. It is specifically designed for the second-generation Ford Puma (internally referred to as Puma ’20) and belongs to a family of control units that share technical similarities with Bosch references such as 0 285 001 348.

The primary task of this module is to continuously monitor the entire restraint system. In the event of a collision, it analyzes incoming signals within milliseconds and activates the necessary pyrotechnic components to ensure occupant safety.

Why does the YS6T-14B056-AC control unit fail?

The most common causes of failure for the YS6T-14B056-AC control unit are stored crash data after an airbag deployment, as well as internal hardware defects on the circuit board. A typical internal fault manifests itself through the persistent error code B1342, which cannot be cleared.

After a crash in which airbags or seatbelt pretensioners have been deployed, the control unit stores so‑called crash data. For safety reasons, these data lock the module and prevent further use. This condition is intentional but can be resolved by a professional reset performed at a specialized workshop, without requiring an expensive new part.

Independently of a crash, purely electronic faults may also occur. A frequently diagnosed error code is B1342, indicating an internal defect within the control unit. The cause often lies in the hardware—such as cold solder joints on connectors or processors—or in defective components like voltage regulators, capacitors, or driver ICs. Such defects can typically be fixed by targeted repair of the printed circuit board (PCB).

How do you recognize a defect in the YS6T-14B056-AC?

A defect in the YS6T-14B056-AC control unit usually presents itself through a permanently illuminated airbag warning light on the instrument cluster. Additional reliable indicators include loss of communication with the diagnostic tool and error messages such as “Refer to the manual” or specific error codes.

The clearest symptom is a continuously lit or intermittently flashing airbag warning lamp. This indicates that the system is not operational and may fail to deploy in the event of a crash.

Another critical sign is when the control unit becomes unreachable via the OBD interface. The workshop cannot establish a connection to read or clear errors, directly pointing to a problem with the module itself.

The error code B1342 (internal control unit defect) is often logged in the fault memory. This error cannot be cleared using conventional diagnostic tools and reappears immediately after every attempt to erase it.

In addition, combined electronic issues may arise, including a non‑functioning clock, a flickering airbag light, or unusual behavior of the speedometer illumination, especially during temperature fluctuations.

In which vehicles is the YS6T-14B056-AC installed?

The airbag control unit with part number YS6T-14B056-AC is specifically designed for the second-generation Ford Puma. At Airbag24, we professionally repair this module for the vehicle series and model years listed below, preserving all vehicle‑specific data.

The repairs offered by Airbag24 cover the following vehicle models:

- Ford Puma ’20 (2019–2024)

How is the YS6T-14B056-AC repaired?

At Airbag24, repairs follow a standardized process: Upon receipt, the control unit is analyzed on a test bench to verify the fault. Depending on the nature of the defect, crash data are erased, the software is reprogrammed, or faulty components are replaced. A final functional test ensures full operational readiness.

Before removal, the workshop should confirm via diagnostic equipment that the fault truly resides in the control unit and not in external components such as sensors, wiring, or the slip ring. Prior to disassembly, the vehicle battery must be disconnected according to manufacturer specifications.

Once received by Airbag24, the module undergoes a thorough hardware and software inspection. If crash data are present, they are completely and irreversibly erased (crash reset). For internal faults like B1342, the processor is reprogrammed, and the circuit board is inspected for cold solder joints or defective components, which are then expertly repaired.

A key advantage of repair is that all vehicle-specific data, such as the Vehicle Identification Number (VIN) and configuration, are preserved. As a result, the repaired control unit can be reinstalled without time-consuming reprogramming. We provide 2 years' statutory liability for defects on every repair performed.