Airbag control unit with part number 89170-12J10

What does the airbag control unit 89170-12J10 do?

The airbag control unit 89170-12J10 is the control unit of the restraint system (SRS) of Toyota. It evaluates the crash sensors, decides in a fraction of a second on airbags and seatbelt pretensioners in the event of an impact, and checks the system continuously.

It shows faults via the airbag warning light in the instrument cluster. After an accident it secures crash data and locks itself.

Without a working control unit, the restraint system cannot work as intended in an emergency.

Why does the control unit 89170-12J10 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed; a normal diagnostic tool cannot erase it. Other causes are aged components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

The stored crash data can be the starting point in cases of this kind. Its presence does not mean that an airbag has deployed. An ordinary diagnostic tool cannot remove it, and it is erased as part of the repair.

Aged components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes from a weak battery or a jump start are also possible, regardless of an accident.

How can you tell that the 89170-12J10 is defective?

A defect shows itself through an airbag warning light that lights up constantly or intermittently, through a fault message in the instrument cluster, or through a diagnostic tool without a connection to the control unit. A fault memory that cannot be cleared is also an indication. In that case, airbags and seatbelt pretensioners may not deploy in an emergency.

The airbag warning light in the instrument cluster is the most important sign. It lights up as soon as the control unit has detected a fault, either constantly or only intermittently.

A fault message in the instrument cluster may come on top of this. If the diagnostic tool cannot connect to the control unit, or the fault memory remains after clearing, this is an additional finding.

Therefore have the finding checked promptly, because in an emergency airbags and seatbelt pretensioners may not deploy.

Which vehicles is the 89170-12J10 fitted in?

The control unit 89170-12J10 is fitted in these vehicles: Toyota Corolla E170 (2013-2018). Establish whether your car is among them by make and model.

These vehicles are known to us with this part number:

• Toyota Corolla E170 (2013-2018)

Compare the part number on the label of the removed unit with this page. This only confirms that it is the right unit. Have the fault memory read out beforehand, because the result shows whether the control unit is defective or whether a plug or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-02C70, 89170-12180, 89170-12G10, 89170-12N50.

How does the repair of the 89170-12J10 work?

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

The sequence is mandatory for safety reasons. Only after the read-out is the battery disconnected, and only then is the control unit removed.

Airbag24 examines the unit on the test bench, repairs or replaces defective components, erases the crash data and carries out 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 89170-12J10 get to Airbag24?

You send the control unit 89170-12J10 in as a parcel, 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 parcel and pack the unit shockproof.