Airbag control unit with part number 89170-52690

What does the airbag control unit 89170-52690 do?

The airbag control unit 89170-52690 is the central control unit of the SRS restraint system of Toyota. It processes the crash sensor data, decides in a crash on triggering the airbags and seatbelt pretensioners, and monitors the system continuously. If it detects a fault, the airbag warning light comes on.

After an accident, it stores crash data and locks itself.

Monitoring runs throughout every journey, so that faults become visible as early as possible.

Why does the control unit 89170-52690 fail?

Stored crash data are at the top of the list of causes for the 89170-52690, even without a triggered airbag. A standard diagnostic tool cannot erase them. Other causes include aged components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

Only reading out the fault memory shows whether this data is present.

The other causes lie in the electronics themselves. Components age, solder joints can go cold, and moisture or corrosion attacks the plug contacts. Strong voltage spikes, for example from a weak battery or a jump start, additionally stress the unit.

How can you tell that the 89170-52690 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently and thus indicates a defect. In addition there are a fault message in the instrument cluster, no connection to the diagnostic tool, and a fault memory that cannot be cleared. Then airbags and seatbelt pretensioners may not trigger in an emergency.

The light is the most important warning sign, because the system itself switches it on.

If it stays on for longer, have the system checked promptly.

Which vehicles is the 89170-52690 fitted in?

The part number 89170-52690 is decisive for this allocation. The control unit is fitted in these vehicles at Toyota: Toyota Yaris XP90 (2005-2009) and XP90 Facelift (2009-2011).

A list of vehicles follows here:

• Toyota Yaris XP90 (2005-2009)
• Toyota Yaris XP90 Facelift (2009-2011)

First compare the part number on the label with this page; that way you can be sure you have the correct unit. In addition, have the fault memory read out, because only that 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 212986-105, 212986-110, 220749-101, 89170-0D160, 89170-0D170, 89170-0D180.

How does the repair of the 89170-52690 work?

First have the fault memory read out and attach the log. Then disconnect the battery, remove the control unit 89170-52690 and create a repair order online. Finally, send in the well-packed unit.

Airbag24 checks 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.

Afterwards your own unit comes back 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 89170-52690 get to Airbag24?

You send the unit 89170-52690 in as a parcel, or you book a UPS collection for an extra charge. After completion of the repair, the unit returns to you by UPS. Put the printed repair order into the parcel and pack the unit shock-resistant.

A sturdy carton with padding protects the control unit, and the enclosed order assigns it clearly.