Airbag control unit with part number 89170-0DD50

What does the airbag control unit 89170-0DD50 do?

The airbag control unit 89170-0DD50 forms the central control unit of the SRS restraint system for Toyota in the vehicle. It processes the measurements from the impact sensors, decides in a crash within milliseconds which airbags and seatbelt pretensioners to trigger, and continuously monitors the entire system. If it detects a fault, it shows this via the airbag warning light.

During operation, the unit constantly checks the connected components so that the system works reliably in an emergency. After an accident, it stores crash data and locks itself.

Why does the control unit 89170-0DD50 fail?

Most commonly, the cause is crash data stored after an accident, even if no airbag has triggered, and a normal diagnostic tool cannot erase it. Other causes include aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data arises when the control unit registers an accident and remains stored afterwards. That is why the fault message persists even when the vehicle drives normally again.

The further causes in detail:

• Aged electronic components that cause faults over time.
• Cold solder joints inside the unit.
• Moisture and corrosion at plug connections.
• Voltage spikes, for example from a weak battery or when jump-starting a vehicle.

How can you tell that the 89170-0DD50 is defective?

A defect shows itself through an airbag warning light in the instrument cluster that lights up permanently or intermittently, a fault message in the instrument cluster, the diagnostic tool being unable to connect to the control unit, or a fault memory that cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may then fail to trigger. This applies regardless of whether the fault lies in the unit itself or only in the wiring.

The warning light is the system's message to you. Even an intermittent light is a reason to have the fault memory read.

Which vehicles is the 89170-0DD50 fitted in?

The airbag control unit 89170-0DD50 is fitted in these vehicles: Toyota Yaris XP130 2nd Facelift (2017-2020), XP130 (2010-2014) and XP130 1st Facelift (2014-2017).

These vehicles are listed in the following overview:

• 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 it is the correct unit; the comparison does nothing more. Have the fault memory read beforehand, because only this log 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 89170-0DD50 work?

First have the fault memory read and attach the log, then disconnect the battery and only then remove the control unit. Next, create a repair order online and send the unit well packed. Processing at Airbag24 usually takes 3–4 working days.

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 89170-0DD50 get to Airbag24?

You send the parcel yourself, or you book a UPS collection for an extra charge. After the repair, Airbag24 returns the unit by UPS.

You put the printed repair order into the parcel, and pack the unit shock-proof.