Airbag control unit with part number 89170-26660

What does the airbag control unit 89170-26660 do?

The airbag control unit 89170-26660 coordinates the restraint system (SRS) in Toyota. From the measured values of the crash sensors, it calculates in an emergency which airbags and which seatbelt pretensioners are to be triggered, within fractions of a second.

Between accidents, the unit checks the entire system in a continuous loop. If it detects a fault, it displays this via the airbag warning light in the instrument cluster.

In a crash, the electronics create crash data and then lock themselves. Only a repair can release this lock.

Why does the control unit 89170-26660 fail?

Most often the cause lies in crash data from an earlier accident, even if no airbag fired. An ordinary diagnostic tool cannot remove this data. Further triggers are aged components, cold solder joints, moisture and corrosion on plugs, and voltage spikes from the vehicle electrics.

Crash data comes into being when the control unit records an event. No airbags need to have deployed for this. The data stays in memory even if nothing can be seen on the vehicle any more.

The other factors tend to act gradually. Electronics age, solder joints can become weak points, and plug contacts corrode once moisture gets in. A weak battery or a jump start can also generate voltage spikes.

How can you tell that the 89170-26660 is defective?

The airbag warning light in the instrument cluster stays on permanently or flickers intermittently. In addition, a fault message appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

It is better to respond to this signal promptly, because in an emergency the airbags and seatbelt pretensioners may fail to deploy. The light therefore shows the defect before it makes itself felt in other ways.

A missing connection to the diagnostic tool is also a clear indication. Then a precise check is needed to narrow down the cause.

Which vehicles is the 89170-26660 fitted in?

The control unit 89170-26660 is fitted in these vehicles: Toyota HiAce H300 (from 2019). Before removal, it is worth checking the assignment so that you have the right unit in front of you.

The following list shows the vehicles for which this unit is recorded.

• Toyota HiAce H300 (from 2019)

First compare the part number on the label of the removed unit with this page. This only establishes that it is the right unit. Also have the fault memory read out beforehand, because the result shows whether the control unit itself is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 152100-4560, 89170-42D50.

How does the repair of the 89170-26660 work?

At the start of your side is the fault memory: it is read out, you enclose the log, and only then do you disconnect the battery and remove the control unit. Airbag24 checks, repairs and tests the unit and erases the crash data; processing usually takes 3–4 working days.

The sequence is mandatory for safety reasons. Afterwards, create a repair order online and pack the unit well before you send it in.

On the test bench, Airbag24 replaces defective components, erases the stored crash data and carries out a function test. Afterwards your own, repaired unit comes 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 89170-26660 get to Airbag24?

You send the control unit 89170-26660 as a parcel, or for an extra charge you book a UPS collection. Return shipment after the repair is made by UPS.

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