Airbag control unit with part number R2TT-14B321-AB

What does the airbag control unit R2TT-14B321-AB do?

The airbag control unit R2TT-14B321-AB coordinates the restraint system (SRS) for vehicles of the Ford brand. It measures the signals from the crash sensors, decides within milliseconds in an accident and triggers the appropriate airbags and seatbelt pretensioners.

Between events, it monitors the entire system. It indicates a fault via the airbag warning light in the instrument cluster.

After an accident, the control unit stores crash data and locks itself.

Why does the control unit R2TT-14B321-AB fail?

The most common cause with the R2TT-14B321-AB is crash data stored after an accident, even if no airbag was triggered. Other causes are aged electronics, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

This crash data cannot be erased with an ordinary diagnostic tool. Airbag24 erases it as part of the repair.

Further causes at a glance:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connectors
• voltage spikes, for example from a weak battery or a jump-start

How can you tell that the R2TT-14B321-AB is defective?

The airbag warning light in the instrument cluster indicates a defect on the R2TT-14B321-AB when it lights up permanently or intermittently. A fault message, a missing contact with the diagnostic tool or a fault memory that cannot be cleared also point to a problem.

The warning light is the most important sign. It indicates a fault in the restraint system. While it is lit, airbags and seatbelt pretensioners may not deploy in an emergency.

If you notice these signs, have the system checked promptly.

Which vehicles is the R2TT-14B321-AB fitted in?

The R2TT-14B321-AB is fitted in these vehicles: Ford Transit 7 ’14 (from 2014).

The overview shows the models to which this part number is assigned:

• Ford Transit 7 ’14 (from 2014)

Compare the part number on the label of the removed unit with this page. This only tells you that it is the right unit. Whether the control unit is defective or a plug or cable is the cause is shown only by the fault memory. Have it read out beforehand.

For the same vehicles, we also repair control units with the part numbers BK2T-14B321-BF, BK3T-14B321-AC, DT1T-14B321-DF, KT1T-14B321-KD, LK4Z-14B321-C, LK4Z-14B321-E.

How does the repair of the R2TT-14B321-AB work?

For the repair of the R2TT-14B321-AB, first have the fault memory read out and enclose the log. Then disconnect the battery, remove the control unit and create a repair order online.

Afterwards, pack the unit carefully and send it in. Airbag24 checks it on the test bench, finds defective components and repairs them. The stored crash data is then erased and a function test is carried out.

Airbag24 processes the unit in 3–4 working days. Afterwards, your own unit is returned. 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 R2TT-14B321-AB get to Airbag24?

You send the control unit R2TT-14B321-AB in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you via UPS.

Put the printed repair order into the parcel and pack the unit shockproof.