Airbag control unit with part number 89170-12F30

What does the airbag control unit 89170-12F30 do?

The airbag control unit 89170-12F30 controls the restraint system (SRS) of Toyota. It reads the signals of the crash sensors and decides in an accident within fractions of a second which airbags and seatbelt pretensioners are triggered.

Between events the unit monitors the other components of the system continuously. If it finds a fault, it reports it via the airbag warning light in the instrument cluster.

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

Why does the control unit 89170-12F30 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed; a normal diagnostic tool cannot erase it. Other causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

This data may therefore be present even if the airbags did not deploy in the accident. A diagnostic tool cannot reach it, so the fault may persist until the data is removed during the repair.

The other causes tend to act over time and through environmental influences on the connections. Whether any of them play a role in an individual case is only shown by the examination in the laboratory.

How can you tell that the 89170-12F30 is defective?

The airbag warning light in the instrument cluster stays on constantly or only intermittently, an error message appears, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

If any of these signs is present, the restraint system may possibly not trigger in an emergency. A brief lighting of the light is also a reason to have the vehicle checked promptly.

Which vehicles is the 89170-12F30 fitted in?

The 89170-12F30 is fitted in these models: Toyota Corolla E170 (2013-2018).

The assignment for this part number is listed here.

• Toyota Corolla E170 (2013-2018)

First compare the part number on the label of the removed unit with this page. This only confirms that it is the right unit and says nothing about its condition. Have the fault memory read out beforehand, because only the result 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 89170-12F30 work?

First read out the fault memory and enclose the log. Then disconnect the battery and only then remove the control unit. Next, create a repair order online and send the well-packed unit.

The order is mandatory for safety reasons. Airbag24 tests the unit on the test bench and replaces defective components; processing usually takes 3–4 working days.

Afterwards the stored crash data is erased, a function test follows, and your own unit goes 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 89170-12F30 get to Airbag24?

You either send the control unit as a parcel yourself, or book a UPS collection for an extra charge. Airbag24 handles the return shipment by UPS.

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