Airbag control unit with part number 28556 JR65C

What does the airbag control unit 28556 JR65C do?

The airbag control unit 28556 JR65C acts as the central unit of the restraint system (SRS) of Nissan. It evaluates the crash sensors, decides in an emergency within milliseconds whether airbags and seatbelt pretensioners are triggered, and monitors the system permanently.

The unit reports faults via the airbag warning light in the instrument cluster. The light is therefore the visible sign that something is wrong in the restraint system.

After an accident, the control unit stores crash data and locks itself. It handles the rest of the sensor evaluation in the background, without you having to do anything.

Why does the control unit 28556 JR65C fail?

Most often the cause is crash data stored after an accident, even if no airbag has triggered. Further causes are aged components, dry solder joints, moisture and corrosion at plug connections, and voltage spikes.

A standard diagnostic tool cannot remove crash data. It stays in the control unit, and this makes it possible to trace an accident as the cause later.

The further causes include:

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

How can you tell that the 28556 JR65C is defective?

The airbag warning light in the instrument cluster lights up constantly or intermittently, an error message appears in the instrument cluster, and the diagnostic tool does not find the control unit. In addition, the fault memory cannot be cleared. If these signs occur together, airbags and seatbelt pretensioners may not trigger in an emergency.

The light indicates a detected fault, even if it lights up only briefly or irregularly. You should not dismiss this behaviour as harmless.

Whether the control unit itself is affected is shown by reading out the fault memory. A missing connection can also have other causes.

Which vehicles is the 28556 JR65C fitted in?

The control unit 28556 JR65C is fitted in these vehicles: Nissan Navara D40 (2005-2007) and D40 Facelift (2007-2015).

Here you will find the models that our data lists with this unit.

• Nissan Navara D40 (2005-2007)
• Nissan Navara D40 Facelift (2007-2015)

Compare the part number on the label of the removed unit with this page. This ensures that it is the right unit; the comparison tells you nothing more. Also have the fault memory read out before removal. Only the result shows whether the control unit is defective or whether a plug or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 285001734, 28556 4X00A, 28556EA100, 98820 5X20B, 98820 EB01C, 98820 EB01D.

How does the repair of the 28556 JR65C work?

At Airbag24, the repair of the control unit usually takes 3–4 working days for checking, repairing and testing. First have the fault memory read out and enclose the log, then disconnect the battery. Only then remove the control unit, and send it in well packed with an online repair order.

The order of these steps is mandatory for safety reasons. Removing the unit without first disconnecting the battery is out of the question.

Airbag24 checks the unit on the test bench and replaces defective components. Stored crash data is erased, and a function test follows before your own unit is sent back.

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 JR65C get to Airbag24?

You send the control unit as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns the unit via UPS.

Place the printed repair order in the parcel. Pack the unit shock-proof.