Airbag control unit with part number 89170-35340

What does the airbag control unit 89170-35340 do?

The airbag control unit 89170-35340 controls the restraint system (SRS) of Toyota. It evaluates the signals from the crash sensors, decides in the event of an accident within milliseconds whether airbags and seatbelt pretensioners are triggered, and reports faults via the airbag warning light.

The unit monitors the circuits belonging to the system permanently. If a deviation is detected, it stores it in the fault memory.

After an accident, the control unit creates crash data and locks itself, which makes it special during repair.

Why does the control unit 89170-35340 fail?

The most common cause is stored crash data, even if no airbag was triggered in the incident, and this data cannot be erased with a normal diagnostic tool. Aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or jump-starting, also play a role.

Stored data of this kind remains in the memory until a repair removes it. A normal reading tool provides no access to it.

Aged components and cold solder joints impair the function over time. Moisture and corrosion at the plug connections also disrupt signal transmission.

Voltage spikes stress the electronics when the battery is weak or the vehicle is jump-started.

How can you tell that the 89170-35340 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently, an error message appears in the display, the diagnostic tool does not connect to the control unit, and the fault memory remains. In such a state, airbags and seatbelt pretensioners may not trigger in an emergency.

The warning light is one of the most important indicators in the car. It shows a detected fault, regardless of whether you are driving.

If it does not go out after switching on the ignition, there is a fault that must be checked.

Which vehicles is the 89170-35340 fitted in?

The airbag control unit 89170-35340 is fitted in these vehicles: Toyota FJ Cruiser GSJ15 (2006-2022). The selection shows the models in which this unit has been verified.

The list of vehicles follows for classification.

• Toyota FJ Cruiser GSJ15 (2006-2022)

Compare the part number on the label of the removed unit with this page, so that you know for certain it is the right unit. Also have the fault memory read out beforehand, because only this log 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 89170-35300, 89170-35320, 89170-35380, 89170-35470.

How does the repair of the 89170-35340 work?

First have the fault memory read out, then disconnect the battery and only then remove the control unit 89170-35340. Create a repair order online and send in the packed unit.

Airbag24 tests the unit on the test bench, and defective components are repaired. Stored crash data is erased, a function test follows, and then your own unit is returned to you. Testing, repair and the function test at Airbag24 usually take 3–4 working days.

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 89170-35340 get to Airbag24?

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

The printed repair order comes with the parcel, and you pack the control unit shock-proof.