Airbag control unit with part number 89170-62090

What does the airbag control unit 89170-62090 do?

As the central control unit, the airbag control unit 89170-62090 monitors the restraint system (SRS) in Toyota. It processes the signals from the crash sensors and, in an accident, triggers the appropriate airbags and seatbelt pretensioners within milliseconds. Detected faults are shown via the airbag warning light.

After an accident, the unit creates crash data and locks itself.

Otherwise, the control remains unobtrusive in everyday use and continuously evaluates its readings.

Why does the control unit 89170-62090 fail?

With the 89170-62090, the main cause is crash data stored after an accident, even if no airbag has deployed; an ordinary diagnostic tool cannot delete it. Other causes include ageing, cold solder joints, moisture and corrosion, and voltage spikes.

The crash data is only deleted during the repair, by Airbag24. Until then, it remains in the unit's memory.

Further triggers are:

• ageing electronics
• cold solder joints on the circuit board
• moisture and corrosion at plug connectors
• voltage spikes, for example from a weak battery or a jump start

How can you tell that the 89170-62090 is defective?

A defect in the 89170-62090 shows as an airbag warning light in the instrument cluster that stays on permanently or intermittently, and as a fault message in the instrument cluster. In addition, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be erased. In this case, the airbags and seatbelt pretensioners may not be able to deploy in an emergency.

These features indicate a defect:

• Airbag warning light on permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool without a connection to the control unit
• Fault memory cannot be erased

If the light is on, have the system checked promptly. The light exists to make the defect visible.

Which vehicles is the 89170-62090 fitted in?

The control unit 89170-62090 is fitted in these vehicles: Toyota Mirai JPD10 (2014-2020).

Below you will find the vehicles assigned to this part number.

• Toyota Mirai JPD10 (2014-2020)

Compare the part number on the label of the removed unit with this page; that only tells you whether you have the right unit. Also have the fault memory read out before removal, because only this shows whether the control unit itself is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-62020, 89170-62100.

How does the repair of the 89170-62090 work?

With the 89170-62090, first have the fault memory read out and enclose the log, then disconnect the battery and remove the unit. Then create the repair order online and send the well-packed unit in. Processing at Airbag24 usually takes 3–4 working days.

On the test bench, Airbag24 examines the control unit, repairs defective components, then deletes the stored crash data and carries out a function test. Afterwards, the 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 89170-62090 get to Airbag24?

Either you pack the control unit 89170-62090 as a parcel, or you book a UPS collection for an extra charge. After the repair, it goes back to you by UPS.

Pack the printed repair order into the parcel as well, and the unit itself should be packed shock-proof.