Airbag control unit with part number 89170-12F01

What does the airbag control unit 89170-12F01 do?

The airbag control unit 89170-12F01 belongs to the restraint system (SRS) of Toyota. It evaluates the crash sensors, decides within milliseconds in a crash on airbags and seatbelt pretensioners, and monitors the system continuously. After a crash, it stores crash data and locks itself.

Faults appear in the instrument cluster via the airbag warning light as soon as the control unit detects them.

Why does the control unit 89170-12F01 fail?

The main cause is stored crash data after an accident, even if no airbag was triggered. A normal diagnostic tool cannot erase it. Other causes are ageing components, cold solder joints, moisture and corrosion, and voltage spikes.

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 jump-starting

The presence of crash data does not show which component is affected. That assignment only comes from the test on the test bench.

How can you tell that the 89170-12F01 is defective?

The airbag warning light lights up permanently or at times, a fault message appears in the instrument cluster, or the diagnostic tool finds no contact with control unit 89170-12F01. A fault memory that cannot be cleared is also a sign.

Typical signs at a glance:

• The airbag warning light lights up permanently or at times
• A fault message in the instrument cluster
• The diagnostic tool cannot establish a connection to the control unit
• The fault memory cannot be cleared

In an emergency, the airbags and seatbelt pretensioners may then fail to trigger.

Which vehicles is the 89170-12F01 fitted in?

The vehicle assignment comes from the documentation for this part number. The airbag control unit 89170-12F01 is fitted in these vehicles: Toyota Corolla E170 (2013-2018).

The vehicles in detail:

• Toyota Corolla E170 (2013-2018)

Comparing the part number on the label with this page only confirms that it is the correct unit. Whether the cause lies in the control unit or in a plug or cable is shown only by the fault memory read out beforehand.

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 89170-12F01 work?

At the start, have the fault memory read out; enclose the log with the unit later. Then disconnect the battery, and only then remove the control unit 89170-12F01. Finally, create a repair order online and send in the well-packed unit.

At Airbag24, the unit is checked, defective components are repaired, the crash data is erased and a function test is carried out. The unit then goes back to you.

Processing at Airbag24 usually takes 3–4 working days. This time covers only checking, repairing and testing in-house.

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 89170-12F01 get to Airbag24?

You can send the control unit 89170-12F01 to Airbag24 as a parcel, or book a UPS collection for an extra charge. After the repair, UPS brings the unit back to you.

Make sure the unit is packed shockproof, and enclose the printed repair order.