Airbag control unit with part number 89170-02U70

What does the airbag control unit 89170-02U70 do?

The airbag control unit 89170-02U70 controls the restraint system of Toyota. It processes the signals from the crash sensors, decides in an accident within milliseconds on airbags and seatbelt pretensioners, and monitors the system during operation. Faults are indicated via the airbag warning light. After an accident it stores crash data and locks itself.

The sensors are spread across the vehicle and report their measured values continuously to the control unit. There, the decision is made as to which restraint devices become active.

The system checks itself continuously. Deviations end up in the fault memory before they lead to a failure.

Why does the control unit 89170-02U70 fail?

The most frequent cause is stored crash data after an accident, even without an airbag having deployed. A normal diagnostic tool cannot delete this data, and that is exactly what keeps the fault going.

Aged electronic components also play a role. Over time, solder joints can go cold, which leads to changing connections.

Moisture and corrosion at plug connections, as well as voltage spikes from the vehicle electrical system, are likewise possible causes. Airbag24 deletes the crash data during the repair and checks the other points on the unit.

How can you tell that the 89170-02U70 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently, possibly together with a fault message. The diagnostic tool also cannot reach the control unit, and the fault memory cannot be cleared. In this case, airbags and seatbelt pretensioners may not deploy in an emergency.

The warning light is the most conspicuous signal. It may appear only briefly after starting and then goes out again, which is still worth checking.

The fault memory does not always show immediately whether the control unit or the wiring is affected. That is why the log is worth a look.

Which vehicles is the 89170-02U70 fitted in?

The 89170-02U70 is fitted in these vehicles: Toyota Corolla E210 (2018-2022) and E210 Facelift (from 2022).

The following list names the vehicles that Airbag24 assigns to this unit.

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

Have the fault memory read out before removal. Afterwards compare the part number on the label of the removed unit with the number you have read off.

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 89170-02U70 work?

Airbag24 generally needs 3–4 working days for checking, repairing and testing. Beforehand, you read out the fault memory, enclose the log, disconnect the battery, remove the control unit and create a repair order online.

Pack the unit carefully after removal. A suitable box with filling material protects the electronics during transport.

Airbag24 checks the unit, repairs defective components, deletes stored crash data and carries out a function test. Your own unit then 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 89170-02U70 get to Airbag24?

You can send the 89170-02U70 yourself as a parcel or have it collected by UPS for an extra charge. The return after the repair also runs via UPS.

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