Airbag control unit with part number 89170-0DB70

What does the airbag control unit 89170-0DB70 do?

The airbag control unit 89170-0DB70 manages the restraint system (SRS) for Toyota. It reads the crash sensors, decides in a crash within fractions of a second which airbags and seatbelt pretensioners are triggered, and monitors the entire system. Any faults that occur are reported via the airbag warning light.

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

The system works as a combination of control unit, sensors, airbags and seatbelt pretensioners. If the control unit fails, the whole combination can be affected.

Why does the control unit 89170-0DB70 fail?

The most common cause is that crash data was stored after an accident, even if no airbag triggered; a normal diagnostic tool cannot erase it. Also possible are ageing electronics, cold solder joints, moisture on plug connections and voltage spikes in the vehicle electrical system.

Other causes at a glance:

• ageing electronic components
• cold solder joints
• moisture and corrosion on plug connections
• voltage spikes, for example from a weak battery or a jump start

The remaining points relate to ageing and the environment.

How can you tell that the 89170-0DB70 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently, a fault message appears, a diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared. In that case, airbags and seatbelt pretensioners may possibly not trigger in an emergency.

A lit warning light is the sign you notice first in everyday driving. Anyone who sees it should have the system checked promptly.

A diagnostic tool without contact and a fault memory that cannot be emptied are additional indications. Together they point to a closer inspection.

Which vehicles is the 89170-0DB70 fitted in?

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

These vehicles are recorded in our data for this number:

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

First, compare the part number on the label of the removed unit with this page; that only confirms it is the correct unit. Then have the fault memory read out before removal, because only the result shows whether the control unit is defective or a connector 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 89170-0DB70 work?

You begin by having the fault memory read out and attaching the log, and you disconnect the battery before removing the unit. Afterwards you create the repair order online and pack the unit securely. Airbag24 examines the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test; processing usually takes 3–4 working days.

The removal follows this order for safety reasons, because the restraint system is involved.

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 89170-0DB70 get to Airbag24?

Either you send the unit as a parcel, or UPS collects it for an extra charge. After the repair, it comes back to you by UPS.

Put the printed repair order into the parcel, and pack the control unit shockproof.