Airbag control unit with part number 98820-1JU0A

What does the airbag control unit 98820-1JU0A do?

The airbag control unit 98820-1JU0A forms the central switching unit of the restraint system at Nissan. It reads the crash sensors, determines in the event of an impact which airbags and seatbelt pretensioners respond, and checks the entire system during operation. After an accident it stores crash data and locks itself.

The triggering decision is made in fractions of a second. For this, sensors, wiring and control circuits must work together reliably, and this is exactly what the control unit monitors without interruption.

If it detects a fault, it shows it via the airbag warning light. This light is therefore the most important feedback you receive from the restraint system.

Why does the control unit 98820-1JU0A fail?

The most common cause on the 98820-1JU0A is stored crash data after an accident, even if no airbag has triggered; they cannot be deleted with a normal diagnostic tool. Further causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

The crash data remain stored in the unit even when the rest of the electronics work perfectly.

Further causes in detail:

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

Which of these applies in an individual case is shown only by the examination of the removed unit.

How can you tell that the 98820-1JU0A is defective?

If the airbag warning light in the instrument cluster lights up permanently or intermittently, this indicates a defect, as does a fault message in the instrument cluster. Even if the diagnostic tool cannot establish a connection to the 98820-1JU0A or the fault memory cannot be cleared, a problem is present. In that case the airbags and seatbelt pretensioners may not trigger in an emergency.

The light indicates the fault as soon as the system detects it. It is therefore not a chance finding, but the intended warning of the system.

A diagnostic tool that cannot establish a connection says nothing about the cause on its own. The problem may lie in the control unit, but equally in a cable or at a plug.

Which vehicles is the 98820-1JU0A fitted in?

The airbag control unit 98820-1JU0A is fitted in these vehicles: Nissan Juke F15 (2010-2019). The vehicle documents make it quick to cross-check this.

The vehicles are shown here as a list:

• Nissan Juke F15 (2010-2019)

Comparing the part number on the label of the removed unit with this page only confirms that it is the correct unit. Have the fault memory read out in addition beforehand; only its contents show 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 285011034, 285012139, 285012905, 98820-4BA0A, 98820-4BA0B, 988201KV1A.

How does the repair of the 98820-1JU0A work?

First have the fault memory read out and enclose the log, then disconnect the battery, and only then remove the control unit 98820-1JU0A. Then create a repair order online and send in the well-packed unit.

On the test bench Airbag24 examines the unit, replaces defective components, deletes the crash data and carries out a function test. Afterwards your own unit goes back to you.

For checking, repairing and testing, Airbag24 typically allows 3–4 working days.

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 98820-1JU0A get to Airbag24?

The control unit 98820-1JU0A goes to Airbag24 either as a parcel or by a UPS collection booked for an extra charge. After the repair it comes back to you by UPS.

Pad the unit shock-proof and enclose the printed repair order.