Airbag control unit with part number 28556 ZH31A

What does the airbag control unit 28556 ZH31A do?

The airbag control unit 28556 ZH31A is the control unit of the restraint system for Nissan. It processes the crash sensors, decides in an accident within milliseconds whether airbags and seatbelt pretensioners fire, and monitors the system constantly.

Faults are displayed via the airbag warning light. After an accident the unit stores crash data and locks itself. Only the repair lifts the lock.

Why does the control unit 28556 ZH31A fail?

The most common cause of a failure of the 28556 ZH31A is crash data after an accident, even if no airbag has deployed. This data cannot be erased with a normal diagnostic tool.

The following causes may also come into consideration:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes from a weak battery or jump-starting

Airbag24 erases the crash data in the course of the repair.

How can you tell that the 28556 ZH31A is defective?

A defect in the 28556 ZH31A shows through the airbag warning light, which lights up permanently or intermittently. Typical further signs are:

• a fault message in the instrument cluster
• no connection between the diagnostic tool and the control unit
• a fault memory that cannot be cleared

In an emergency, airbags and seatbelt pretensioners may not be able to deploy. If you notice one of these signs, have the system checked promptly.

Which vehicles is the 28556 ZH31A fitted in?

The 28556 ZH31A is fitted in these vehicles: Nissan Titan A60 (2004-2015).

These vehicles are recorded for the part number in our database:

• Nissan Titan A60 (2004-2015)

Comparing the part number on the label with this page only ensures that it is the correct unit.

Also have the fault memory read out. Only the 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 0 285 014 624, 1520831000, 152083100B, 1520831U00, 1520831U01, 1520831U0A.

How does the repair of the 28556 ZH31A work?

First have the fault memory read out and enclose the log. Then disconnect the battery, only then remove the 28556 ZH31A and create the repair order online before sending in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components, erases the crash data and carries out a functional test. The time only covers checking, repairing and testing.

Afterwards your own unit is returned to you. 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 28556 ZH31A get to Airbag24?

You send the 28556 ZH31A in as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 sends it back by UPS.

Put the printed repair order into the parcel and pack the unit shock-proof.