Airbag control unit with part number 89170-12D10

What does the airbag control unit 89170-12D10 do?

The airbag control unit 89170-12D10 coordinates the restraint system (SRS) in the Toyota. It measures the deceleration via the crash sensors, decides in an accident within milliseconds on airbags and seatbelt pretensioners, and controls the entire system without interruption.

If a fault is detected, the control unit shows it via the airbag warning light. After an accident it stores crash data and locks itself.

In everyday life the unit hardly stands out, yet its function determines whether triggering happens correctly in an emergency.

Why does the control unit 89170-12D10 fail?

For 89170-12D10 the most common cause is crash data stored after an accident, even without an airbag having triggered. Further causes are ageing electronics, cold solder joints, moisture and corrosion at plugs, and voltage spikes.

Crash data cannot be deleted with a standard diagnostic tool. Airbag24 removes it in the course of the repair.

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

These influences can also occur together. Which cause applies in an individual case is shown only by the evaluation of the fault memory.

How can you tell that the 89170-12D10 is defective?

A defect at the 89170-12D10 shows up through the airbag warning light in the instrument cluster, through a fault message in the instrument cluster, through a missing connection of the diagnostic tool to the control unit, and through a fault memory that cannot be cleared.

The airbag warning light is one of the most important indicators in the vehicle. It lights up permanently or only intermittently and indicates a fault in the restraint system that you should have checked.

If no connection to the control unit is established or the fault memory cannot be emptied, this also indicates a fault. Airbags and seatbelt pretensioners may then not be able to trigger in an emergency.

Which vehicles is the 89170-12D10 fitted in?

The control unit 89170-12D10 matches the models on record for Toyota. It is fitted in these vehicles: Toyota Corolla E170 (2013-2018).

The known vehicles with this part number are listed below.

• Toyota Corolla E170 (2013-2018)

Comparing the part number on the label of the removed unit with this page only shows that it is the correct unit. Have the fault memory read out beforehand, because only this shows whether the control unit is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-02C70, 89170-12180, 89170-12G10, 89170-12N50.

How does the repair of the 89170-12D10 work?

First have the fault memory read out and enclose the log. Then disconnect the battery, remove the control unit 89170-12D10 and create the repair order online before you send the unit. At Airbag24, testing, repair and function test usually take 3–4 working days.

The sequence is fixed for safety reasons. A well-padded parcel also protects the control unit on the way.

Airbag24 tests the unit on the test bench, replaces defective components, deletes the stored crash data and carries out a function test.

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 89170-12D10 get to Airbag24?

You send the control unit 89170-12D10 as a parcel or book a UPS collection for an extra charge. After the repair the unit is sent back to you by UPS.

Enclose the printed repair order and pack the control unit shock-proof.