Airbag control unit with part number 89170-0D690

What does the airbag control unit 89170-0D690 do?

The airbag control unit 89170-0D690 is the central control unit of the restraint system (SRS) for Toyota. It evaluates the signals from the crash sensors, determines in an accident which airbags and seatbelt pretensioners are triggered, and checks the system continuously. It shows any faults found via the airbag warning light.

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

The control unit is in constant contact with sensors and seatbelt pretensioners, and its decisions act directly on the safety function.

Why does the control unit 89170-0D690 fail?

The most common cause is an entry from an earlier accident, namely stored crash data, even if no airbag was deployed. A common diagnostic tool does not remove it. Aging components, solder joints, moisture and corrosion at plug connections, as well as voltage spikes from a weak battery or a jump start, also play a role.

The crash data sits in the control unit's memory and cannot be removed with ordinary tools.

The other causes relate to ageing and the environment: electronics change over the years, and moisture attacks connections. Voltage spikes when starting put additional strain on the unit.

How can you tell that the 89170-0D690 is defective?

A defect shows itself through the airbag warning light, which stays on permanently or lights up from time to time, through a fault message in the instrument cluster, through a diagnostic tool with no connection to the control unit, and through a fault memory that cannot be cleared.

The individual signs at a glance:

• airbag warning light on permanently or from time to time
• fault message in the instrument cluster
• no connection between diagnostic tool and control unit
• fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may fail to deploy in the event of a defect, so each of these signs is a reason for an inspection.

Which vehicles is the 89170-0D690 fitted in?

The 89170-0D690 is fitted in these vehicles: Toyota Yaris XP130 2nd Facelift (2017-2020), XP130 (2010-2014) and XP130 1st Facelift (2014-2017).

The list shows the vehicles this part number belongs to.

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

Compare the number on the label of the removed unit with this page; then you know that it is the correct unit. This comparison does not clarify the cause. Therefore have the fault memory read out beforehand, because only this result 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 89170-0D690 work?

You have the fault memory read out and enclose the log. Then you disconnect the battery, and only after that is the control unit removed. You create the repair order online before sending in the well-packed unit.

At Airbag24 the unit is examined on the test bench, defective components are replaced, stored crash data is erased, and a function test is carried out. Afterwards your own unit is returned to you.

Processing usually takes 3–4 working days, and this time covers only the checking, repairing and testing. Removal only after the readout and disconnection is a safety requirement.

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 89170-0D690 get to Airbag24?

Shipping is either as a parcel that you send yourself, or as a UPS collection that you book for an extra charge. Airbag24 then returns the repaired unit to you by UPS.

Put the printed repair order into the parcel and pack the control unit shock-resistant.