Airbag control unit with part number 89170-12590

What does the airbag control unit 89170-12590 do?

The airbag control unit 89170-12590 coordinates the safety systems of the restraint system (SRS) in the Toyota. It reads the crash sensors, selects the appropriate airbags and seatbelt pretensioners within milliseconds in a crash, and monitors the system constantly.

Faults are displayed via the airbag warning light in the instrument cluster.

After an accident the unit stores crash data and locks itself. The same component is known as the SRS control unit.

Why does the control unit 89170-12590 fail?

The most common cause is crash data stored in the memory after an accident, even if no airbag has deployed. Aged electronics, cold solder joints, moisture at plugs and voltage spikes can also be causes.

Such data cannot be cleared with a standard diagnostic tool, and Airbag24 removes it during the repair.

The remaining causes affect the electronics and the connections: aged components, cold solder joints and moisture with corrosion at plug connections. Voltage spikes, for example from a weak battery or when starting with jump leads, can also trigger the failure.

How can you tell that the 89170-12590 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently, and an error message also appears in the instrument cluster. In addition, the diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared.

The warning light is the most visible sign; the message in the instrument cluster specifies it.

In an emergency, airbags and seatbelt pretensioners may then fail to deploy. Therefore have the system checked.

Which vehicles is the 89170-12590 fitted in?

The 89170-12590 is fitted in these vehicles: Toyota Corolla E170 (2013-2018).

This overview shows the vehicles in which the unit is installed:

• Toyota Corolla E170 (2013-2018)

Compare the part number on the label of the removed unit with this page. This only establishes whether it is the correct unit. Also have the fault memory read out. Only this 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 89170-12590 work?

First have the fault memory read out and enclose the log. Then disconnect the battery, and only then remove the control unit 89170-12590 and create a repair order online.

Pack the unit well and send it in; work at Airbag24 then begins.

There the control unit is tested on the test bench, defective components are replaced, the crash data is cleared, and a function test follows. Processing usually takes 3–4 working days, after which your own unit is sent back.

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 89170-12590 get to Airbag24?

You send the control unit 89170-12590 in as a package, or book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

Put the printed repair order in the package and pack the control unit shock-proof.