Airbag control unit with part number 98221SJ600

What does the airbag control unit 98221SJ600 do?

The airbag control unit 98221SJ600 controls the restraint system (SRS) of Subaru centrally. It reads the crash sensors and determines in an emergency within milliseconds which airbags and seatbelt pretensioners are triggered. Between events, it continuously checks the entire system.

The system comprises sensors, firing circuits and wiring, and the control unit keeps all three in view. If it finds a fault, it switches on the airbag warning light in the instrument cluster and stores the entry.

After an accident, the unit writes crash data and remains locked afterwards. The section on causes looks at this data in more detail.

Why does the control unit 98221SJ600 fail?

The most common cause is stored crash data after an accident, even without airbags being triggered. Ageing components, cold solder joints, moisture and corrosion, as well as voltage spikes, are also possible.

• Ageing electronic components in the control unit
• Cold solder joints on the circuit board
• Moisture and corrosion at plug connections
• Voltage spikes, for example from a weak battery or a jump start

The crash data remains in the unit, and a standard diagnostic tool cannot erase it. That is why the entry also appears when you have not changed anything on the vehicle.

Which of these causes applies in an individual case is shown only by the read-out log of the fault memory. Only then can the finding be classified meaningfully.

How can you tell that the 98221SJ600 is defective?

A defect shows itself through the airbag warning light in the instrument cluster when it is on, through a fault message, through a missing connection to the diagnostic tool, or through a fault memory that cannot be cleared. Airbags and seatbelt pretensioners may then not deploy in an emergency.

The warning light is the most important sign the system gives. It may stay on permanently or come on only occasionally, and every indication justifies having the fault memory read out.

A missing connection to the diagnostic tool does not necessarily lie in the control unit. Plugs and wiring can also be the cause, and only testing can narrow that down.

Which vehicles is the 98221SJ600 fitted in?

The airbag control unit 98221SJ600 is fitted in these vehicles: Subaru Forester SK (2018-2021) and SK Facelift (from 2021).

The list shows the vehicles recorded for this part number.

• Subaru Forester SK (2018-2021)
• Subaru Forester SK Facelift (from 2021)

Compare the number on the label of the removed unit with this page. That tells you only that you have the correct unit. It does not establish a cause. For that, have the fault memory read out beforehand, because only the result 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 1523004370, 98221FC210, 98221SJ000, 98221SJ001.

How does the repair of the 98221SJ600 work?

Before removal, read out the fault memory and enclose the log. Then disconnect the battery and only after that remove the control unit. Only then create the repair order online and send the well-packed unit in. Testing, repair and functional test at Airbag24 usually take 3–4 working days.

The order is binding for safety reasons. Pack the unit well afterwards and send it in.

Airbag24 checks the control unit on the test bench, replaces defective components, deletes stored crash data and carries out a functional test. Afterwards your own unit goes 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 98221SJ600 get to Airbag24?

The unit goes to Airbag24 as a parcel, or you book a UPS collection for an extra charge. The return after the repair is also made by UPS.

Enclose the printed repair order in the parcel, and pack the control unit shock-proof.