Airbag control unit with part number 89170-0DA50

What does the airbag control unit 89170-0DA50 do?

The airbag control unit 89170-0DA50 controls the restraint system (SRS) of Toyota. It evaluates the crash sensors, determines the triggering of airbags and seatbelt pretensioners in an accident, and monitors the system continuously. After an accident it stores crash data and locks itself.

Faults are shown by the airbag warning light, which sits in the instrument cluster.

Monitoring covers the sensors, the wiring and the output stages of the firing circuits.

Why does the control unit 89170-0DA50 fail?

Stored crash data from an accident are the most common cause with the 89170-0DA50, even if no airbag has deployed, and a normal diagnostic tool cannot erase them. Other causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data is an entry in the memory of the unit and not damage to the component.

The other causes lie in the electronics and their connections. High voltage spikes arise, for example, from a weak battery or jump-starting.

How can you tell that the 89170-0DA50 is defective?

The airbag warning light in the instrument cluster lights up on the 89170-0DA50 permanently or intermittently, or a fault message appears in the instrument cluster. Add to that when the diagnostic tool gets no connection to the control unit or the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

The warning light is the clearest signal, because it is constantly in view and shows the condition of the system.

If you notice any of these signs, have the fault memory read out promptly.

Which vehicles is the 89170-0DA50 fitted in?

The 89170-0DA50 is fitted in these vehicles: Toyota Yaris XP130 2nd Facelift (2017-2020), XP130 (2010-2014) and XP130 1st Facelift (2014-2017).

The vehicles for which this part number is on record are listed here:

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

Compare the part number on the label of the removed unit with this page; this only ensures that you have the right unit. A prior readout of the fault memory, by contrast, shows 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 2310009950, 89170-0D300, 89170-0D320, 89170-0D590, 89170-0D600, 89170-0D620.

How does the repair of the 89170-0DA50 work?

First have the fault memory read out and attach the log; then disconnect the battery and only then remove the 89170-0DA50. Next create a repair order online and send the well-packed unit in. For checking, repairing and testing at Airbag24 allow for 3–4 working days as a rule.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. Afterwards your own unit is returned 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 89170-0DA50 get to Airbag24?

You send in the 89170-0DA50 as a parcel or arrange a UPS collection for an extra charge. After the repair, Airbag24 sends the unit back to you by UPS.

Put the printed repair order in the parcel and pack the unit so that it withstands knocks.