Airbag control unit with part number 28556 8F200

What does the airbag control unit 28556 8F200 do?

The airbag control unit 28556 8F200 is the control unit of the restraint system (SRS) for Nissan. It reads the crash sensors, decides in a crash within milliseconds whether airbags and seatbelt pretensioners are triggered, and checks the system continuously.

The unit reports faults via the airbag warning light. After an accident it stores crash data and locks itself.

All sensors and trigger units come together in this unit, so every fault affects the entire system.

Why does the control unit 28556 8F200 fail?

The most common cause is crash data stored after an accident, even without an airbag triggering, which a normal diagnostic tool does not remove. Further causes are aged components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

Crash data arises when an accident is registered. It stays in the memory until Airbag24 removes it during the repair, because a normal diagnostic tool cannot do this.

Aged electronics can fail, and cold solder joints can lose contact. Moisture together with corrosion attacks the plug connections, and voltage spikes put additional strain on the electronics.

How can you tell that the 28556 8F200 is defective?

The airbag warning light in the instrument cluster stays on continuously or keeps returning, error messages appear in the instrument cluster, the diagnostic tool cannot reach the control unit, and the fault memory remains even after an attempt to clear it.

If the control unit is defective, airbags and seatbelt pretensioners may not be able to trigger in an emergency. The warning light therefore has to be taken seriously.

When the warning appears, have the fault memory read out promptly so that the cause becomes clear.

Which vehicles is the 28556 8F200 fitted in?

The assignment refers to this part number. The airbag control unit 28556 8F200 is installed in these vehicles: Nissan Terrano R20 (1993-2007).

The vehicles are listed one below the other here:

• Nissan Terrano R20 (1993-2007)

Comparing the part number on the label of the removed unit with this page only confirms that it is the right unit. Only the fault memory, read out in advance, shows whether the control unit is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 285001109, 285001480, 28556 8F000, 285562X100, 285562X11C, 988202X325.

How does the repair of the 28556 8F200 work?

First have the fault memory read out and attach the log to the unit. Then disconnect the battery, and only afterwards remove the control unit. Then create a repair order online and send the unit in well packed. Airbag24 needs 3–4 working days in total for testing, repair and function test.

Airbag24 checks the unit on the test bench, replaces defective components, deletes the crash data and carries out a function test. Airbag24 needs 3–4 working days for this. Afterwards your own unit is sent back 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 8F200 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. Airbag24 returns the repaired unit to you by UPS. Put the printed repair order into the parcel and pack the unit shock-proof.

Sturdy packaging matters, because shocks during transport can damage the unit.