Airbag control unit with part number 89170-02K30

What does the airbag control unit 89170-02K30 do?

For Toyota, the airbag control unit 89170-02K30 coordinates the restraint system (SRS). It evaluates the signals from the sensors that detect an impact and, in an accident, determines within milliseconds which airbags and seatbelt pretensioners are triggered. After an accident, it stores crash data and locks itself.

The system checks the installation continuously and shows faults via the airbag warning light.

Storing data after an accident is one of the unit's tasks. What exactly is recorded is held in the control unit's memory.

Why does the control unit 89170-02K30 fail?

Stored crash data is most often the cause on the 89170-02K30, even if no airbag fired in an accident. A normal diagnostic tool cannot remove it. Aged electronics, cold solder joints, moisture and corrosion on plugs, and voltage spikes are also possible.

The crash data comes from an accident in which the unit made a recording. Whether an airbag fired in it makes no difference to this recording.

Aged components, cold solder joints and moisture at the plug connections affect the electronics. Voltage spikes, for example from a weak battery or a jump start, put additional strain on them. Airbag24 deletes the crash data during the repair.

How can you tell that the 89170-02K30 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and the instrument cluster shows a fault message. In addition, the diagnostic tool cannot reach the 89170-02K30, and the fault memory cannot be cleared.

Once the warning light comes on, the system has detected a fault itself. It shows the fault without you having to look for it.

While the control unit is faulty, airbags and seatbelt pretensioners may not be able to trigger in an emergency. A prompt check is therefore sensible.

Which vehicles is the 89170-02K30 fitted in?

Whether the unit is actually defective is shown only by the read-out fault memory. The airbag control unit 89170-02K30 is fitted in these vehicles: Toyota Corolla E170 (2013-2018).

The models with this control unit can be found here:

• Toyota Corolla E170 (2013-2018)

First, compare the part number on the label of the removed unit with this page; this only confirms that it is the right unit. Second, have the fault memory read out before removal, because only the result shows whether the unit itself is defective or whether a plug or cable is behind the fault.

For the same vehicles, we also repair control units with the part numbers 89170-02C60, 89170-02C70, 89170-02C80, 89170-02C90, 89170-12280, 89170-12340.

How does the repair of the 89170-02K30 work?

First have the fault memory read out, attach the log and then disconnect the battery. Afterwards remove the control unit 89170-02K30, create a repair order online and send the unit in well packed. The check, the repair and the function test at Airbag24 usually take 3–4 working days.

At Airbag24, the unit goes onto the test bench; there, defective components are repaired, the crash data is deleted and a function test is run. Afterwards, your own unit is returned to you.

The order at the start is mandatory, so that removal takes place safely.

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 89170-02K30 get to Airbag24?

You send the control unit 89170-02K30 as a package, or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Put the printed repair order into the package and pack the unit securely.