Airbag control unit with part number YS4T-14B056-CA

What does the airbag control unit YS4T-14B056-CA do?

The airbag control unit YS4T-14B056-CA is the central control unit of the restraint system (SRS) for Ford. It evaluates the signals from the crash sensors and decides in a crash within milliseconds which airbags and seatbelt pretensioners are triggered. It reports faults via the airbag warning light.

After a crash the unit stores crash data and locks itself. The evaluation runs in the background throughout every journey, and in everyday use you notice nothing of it as long as the system is in order.

The manufacturer number Bosch 0285001395 is also printed on the housing. You can compare this imprint with the part number before sending the unit in.

Why does the control unit YS4T-14B056-CA fail?

The most common cause is crash data stored after an accident, even if no airbag was triggered; a normal diagnostic tool cannot erase it. Aged electronic components, faulty solder joints, moisture and corrosion at plug connectors, and voltage spikes such as from a weak battery or a jump start are also possible.

The crash data stays in the unit until it is erased during the repair. That is why it is always checked first.

The other causes can occur individually or together. Which of them applies to your unit is shown only by reading out the fault memory, and that is exactly what we recommend before removal.

How can you tell that the YS4T-14B056-CA is defective?

A defect shows as the airbag warning light in the instrument cluster staying on permanently or intermittently. In addition there may be an error message in the instrument cluster, a lack of connection to the diagnostic tool, and a fault memory that cannot be cleared.

• Airbag warning light stays on permanently
• Airbag warning light comes on only intermittently
• Error message in the instrument cluster
• Diagnostic tool receives no connection to the control unit
• Fault memory cannot be cleared

If one of these findings persists, airbags and seatbelt pretensioners may not trigger in an emergency. The warning light exists precisely to inform you, so it should be taken seriously and checked promptly.

Which vehicles is the YS4T-14B056-CA fitted in?

Control unit YS4T-14B056-CA is fitted in these vehicles: Ford Focus 1 ’99 Facelift (2001-2004) and 1 ’99 (1998-2001).

This listing names the vehicles that are on record for this part number.

• Ford Focus 1 ’99 Facelift (2001-2004)
• Ford Focus 1 ’99 (1998-2001)

On the one hand, compare the part number on the label of the removed unit with this page. That only ensures you have the right unit. On the other hand, have the fault memory read out beforehand. Only this result shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 0 285 001 249, 0285001396, 2M5T-14B056-DD, 98AG14B056ACE, 98AG14B056ACF, YS4T14B056AA.

How does the repair of the YS4T-14B056-CA work?

First have the fault memory read out and attach the log, then disconnect the battery. Only then remove the control unit, create a repair order online and send the unit in well packed.

Airbag24 checks your control unit on the test bench, repairs the defective components, erases the stored crash data and then carries out a function test. Processing at Airbag24 usually takes 3–4 working days.

Our repairs come with 2 years' statutory liability for defects. The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.

How does the control unit YS4T-14B056-CA get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 sends it back via UPS.

Put the printed repair order into the parcel and pack the unit shockproof. This keeps the control unit protected on the way, and the order is right with it.