Airbag control unit with part number 89170-02J30

What does the airbag control unit 89170-02J30 do?

The airbag control unit 89170-02J30 coordinates the SRS restraint system of Toyota. It checks the crash sensors and triggers continuously, and decides in a crash which airbags and seatbelt pretensioners fire. After an accident, it stores crash data and locks itself.

The unit processes the measured values within a few milliseconds once an impact occurs. You do not need to do anything for this.

During normal operation you only notice the control unit when a fault is reported, for example via the airbag warning light.

Why does the control unit 89170-02J30 fail?

The most common cause is crash data that remains in the memory after an accident, even if no airbag fired; a standard diagnostic tool cannot remove it. In addition, ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example with a weak battery or a jump start, come into consideration.

The control unit itself creates crash data and keeps it stored there. A diagnostic tool can read it out, but it does not remove it.

Solder joints lose quality over time. Moisture finds its way to the contacts via plug connections, where corrosion forms.

Voltage spikes arise, for example, when a battery is weakening or a vehicle is started with external power. Such events stress the electronics.

How can you tell that the 89170-02J30 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, a fault message appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

The warning light is a direct sign that the vehicle gives, and it is well visible in everyday driving. Anyone who heeds it recognises a fault early.

If one of these findings appears, have the system checked promptly. Cables and plugs can also be the cause, not the unit alone.

Which vehicles is the 89170-02J30 fitted in?

The control unit 89170-02J30 is fitted in these vehicles: Toyota Corolla E170 (2013-2018).

The vehicles for this number at a glance:

• Toyota Corolla E170 (2013-2018)

Compare the part number on the label of the removed unit with this page; that way you know it is the right unit. 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 89170-02C60, 89170-02C70, 89170-02C80, 89170-02C90, 89170-12280, 89170-12340.

How does the repair of the 89170-02J30 work?

First have the fault memory read out and attach the log to the unit. Then disconnect the battery and only then remove the control unit. Next, create a repair order online and send in the unit, well packed. Processing at Airbag24 usually takes 3–4 working days.

The order of these steps is not a detail but part of safe removal.

On the test bench, Airbag24 examines the unit, repairs defective components, erases stored crash data and runs a function test. Afterwards 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 89170-02J30 get to Airbag24?

Shipment is either as a parcel or with a UPS collection that you book for an extra charge. After the repair, Airbag24 returns the unit to you by UPS.

Pack the printed repair order into the parcel and wrap the control unit shock-proof.