Airbag control unit with part number 28556 JR53C

What does the airbag control unit 28556 JR53C do?

The airbag control unit 28556 JR53C is the central control unit of the restraint system (SRS) of Nissan. It checks the crash sensors, decides in an accident within milliseconds on the triggering of airbags and seatbelt pretensioners, and monitors the system permanently.

The unit records faults and displays them via the airbag warning light in the instrument cluster. The monitoring runs in the background.

After an accident, it stores crash data and locks itself.

Why does the control unit 28556 JR53C fail?

The most common cause is crash data stored after an accident, even if no airbag has triggered; an ordinary diagnostic tool cannot delete it. Other causes are ageing components, moisture and voltage spikes.

The crash data remains in the unit, because a standard reading device does not reach it. Airbag24 deletes it during the repair.

The other causes are listed here:

• ageing electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example with a weak battery or jump-starting

How can you tell that the 28556 JR53C is defective?

A defect on the 28556 JR53C shows up as the airbag warning light in the instrument cluster staying on permanently or coming on intermittently. Then airbags and seatbelt pretensioners may not trigger in an emergency.

The airbag warning light in the instrument cluster is the most important warning signal you receive in the vehicle. It may be accompanied by fault messages, and the diagnostic tool then cannot establish a connection with the control unit. If the fault memory cannot be cleared, that is also a sign of a fault. The fact that the light is not lit at the moment does not mean that everything is in order.

Which vehicles is the 28556 JR53C fitted in?

The airbag control unit 28556 JR53C is fitted in these vehicles: Nissan Navara D40 (2005-2007) and D40 Facelift (2007-2015).

The vehicles in list form:

• 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, so that you can be sure you have the right unit in front of you. Whether the control unit is actually defective or a connector or cable is the cause is shown only by the fault memory. For this reason, have it read out before removal.

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 JR53C work?

First, have the fault memory read out and enclose the log. Then disconnect the battery and only afterwards remove the control unit. Next, create a repair order online. Processing at Airbag24 usually takes 3–4 working days.

The sequence is mandatory for safety reasons. Removal only takes place after the battery has been disconnected.

At Airbag24 the unit is examined on the test bench, defective components are repaired or specifically replaced, crash data is deleted and a functional test is carried out. After that, your own unit goes 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 JR53C get to Airbag24?

You send the control unit 28556 JR53C as a parcel or, for an extra charge, book a UPS collection. After the repair, Airbag24 sends it back to you by UPS.

Enclose the printed repair order and pack the unit shock-proof.