Airbag control unit with part number 89170-0DB10

What does the airbag control unit 89170-0DB10 do?

The airbag control unit 89170-0DB10 is the central unit of the restraint system (SRS) of Toyota. It assesses the signals from the crash sensors, decides in a crash on the triggering of airbags and seatbelt pretensioners, and monitors the system continuously. After a crash, it stores crash data and locks itself.

The decision falls within milliseconds, long before an occupant consciously perceives the process.

If faults occur, the control unit reports them via the airbag warning light in the instrument cluster, so the state of the system stays in view.

Why does the control unit 89170-0DB10 fail?

The most common cause is stored crash data in the unit after an accident, even if no airbag has triggered. A normal diagnostic tool cannot remove it. Other possible causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

An earlier accident does not have to have been noticeable. Anyone who has not seen a triggered airbag easily overlooks the connection.

Moisture and corrosion impair the contact at the plugs, and cold solder joints and aged components impair the function. Voltage spikes, for example from a weak battery or a jump start, can also be the trigger.

How can you tell that the 89170-0DB10 is defective?

The defect shows on the airbag warning light in the instrument cluster, which stays on permanently or intermittently, and on an error message in the instrument cluster. In addition, a diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared.

If the light is on, airbags and seatbelt pretensioners may not trigger in an emergency. This also applies if the vehicle otherwise drives normally.

A diagnostic tool without a connection indicates disrupted communication. Only the check shows which point is responsible for it.

Which vehicles is the 89170-0DB10 fitted in?

The control unit 89170-0DB10 was fitted in these Toyota vehicles: Toyota Yaris XP130 2nd Facelift (2017-2020), XP130 (2010-2014) and XP130 1st Facelift (2014-2017). The part number on the label of the unit is sufficient for the comparison.

The vehicles in detail are:

• Toyota Yaris XP130 2nd Facelift (2017-2020)
• Toyota Yaris XP130 (2010-2014)
• Toyota Yaris XP130 1st Facelift (2014-2017)

When removing the unit, comparing the part number helps: checking the part number on the label against this page ensures that you have the right unit, nothing more. Whether the control unit is defective or a plug or cable is the cause is shown only by a fault memory read out beforehand.

For the same vehicles, we also repair control units with the part numbers 2310009950, 89170-0D300, 89170-0D320, 89170-0D590, 89170-0D600, 89170-0D620.

How does the repair of the 89170-0DB10 work?

First have the fault memory read out and attach the log, then disconnect the battery. Only then remove the control unit and create a repair order online. After that, send the unit in well packed.

Airbag24 checks the control unit on the test bench, replaces defective components, deletes stored crash data and carries out a function test. Afterwards, your own, repaired unit comes back to you.

Processing at Airbag24 usually takes 3–4 working days. It covers only checking, repairing and testing, not reading out, removal or shipping.

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 89170-0DB10 get to Airbag24?

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

Pack the control unit shockproof and enclose the printed repair order.