Airbag control unit with part number 89170-02T30

What does the airbag control unit 89170-02T30 do?

The airbag control unit 89170-02T30 controls the restraint system (SRS) in Toyota. It processes the signals from the crash sensors, decides within milliseconds in an accident which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After an accident, it stores crash data and is then locked.

Faults are reported via the airbag warning light in the instrument cluster. Monitoring takes place throughout operation.

Because the decision in an accident has to be made so quickly, an intact condition of the control unit is decisive.

Why does the control unit 89170-02T30 fail?

The most common cause is crash data stored after an accident, even if no airbag was triggered. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Stored crash data cannot be erased with a normal diagnostic tool. It remains in the control unit until it is removed during the repair.

The other causes arise from the electronics themselves or from the plug connections:

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

How can you tell that the 89170-02T30 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. In addition, an error message appears in the instrument cluster, a diagnostic tool finds no connection to the control unit, and the fault memory cannot be erased.

The warning light is the clearest sign, because it indicates the fault itself.

In an emergency, the airbags and seatbelt pretensioners may then fail to trigger. Therefore, have the system checked promptly.

Which vehicles is the 89170-02T30 fitted in?

The airbag control unit 89170-02T30 is fitted in these vehicles: Toyota Corolla E210 (2018-2022) and E210 Facelift (from 2022).

The vehicles for this part number can be found in the following overview:

• Toyota Corolla E210 (2018-2022)
• Toyota Corolla E210 Facelift (from 2022)

Compare the part number on the label of the removed unit with this page. This way you can be sure you have removed the right unit. Have the fault memory read out beforehand, because this result alone 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 89170-02N50, 89170-02T10, 89170-02W80, 89170-0F150.

How does the repair of the 89170-02T30 work?

You have the fault memory read out and attach the log. Then you disconnect the battery. Only after that do you remove the control unit 89170-02T30. Next, create a repair order online and pack the unit well. At Airbag24, checking, repairing and testing usually take 3–4 working days.

Airbag24 checks the unit on the test bench and replaces defective components. Afterwards, the crash data is erased and a function test follows.

Then 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 89170-02T30 get to Airbag24?

You send the control unit 89170-02T30 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

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