Airbag control unit with part number 89170-35410

What does the airbag control unit 89170-35410 do?

The airbag control unit 89170-35410 is the central control unit of the restraint system (SRS) for Toyota. It evaluates the signals from the crash sensors, decides within milliseconds in an accident whether to trigger airbags and seatbelt pretensioners, and monitors the system continuously. Detected malfunctions are reported via the airbag warning light.

The crash sensors supply the measured values on which the unit decides. The evaluation runs in the background while you use the vehicle normally.

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

Why does the control unit 89170-35410 fail?

Stored crash data is the most common cause of a failure, even if no airbag was triggered; a normal diagnostic tool cannot delete it. Other causes include ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes such as those from a weak battery or jump-starting.

At Airbag24, stored crash data is deleted during the repair. The other causes concern the electronics and their connections and can hardly be narrowed down from the outside.

Moisture and corrosion mainly attack plug connections, and voltage spikes arise, for example, during jump-starting.

How can you tell that the 89170-35410 is defective?

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

In this state, airbags and seatbelt pretensioners may not trigger in an emergency. Have the system checked promptly, even if the light comes on only briefly.

Which vehicles is the 89170-35410 fitted in?

The control unit 89170-35410 is fitted in these vehicles: Toyota FJ Cruiser GSJ15 (2006-2022).

The following list shows the vehicles assigned to this part number.

• Toyota FJ Cruiser GSJ15 (2006-2022)

Compare the part number on the label of the unit with this page. That only ensures that it is the correct unit. Also have the fault memory read out beforehand, because only this result shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-35230, 89170-35270, 89170-35280, 89170-35290, 89170-35300, 89170-35320.

How does the repair of the 89170-35410 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only after that remove the control unit 89170-35410. Then create a repair order online and send in the unit, well packed.

Airbag24 checks the unit on the test bench, replaces defective components, deletes stored crash data and carries out a function test. Processing at Airbag24 usually takes 3–4 working days.

After that, your own unit is returned 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 89170-35410 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

The printed repair order goes into the parcel, and the unit must be packed shock-resistant.