Airbag control unit with part number 89170-12G70

What does the airbag control unit 89170-12G70 do?

The airbag control unit 89170-12G70 is the central control unit of the restraint system (SRS) in Toyota. It evaluates the signals from the crash sensors, decides within milliseconds in an accident whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

It indicates faults via the airbag warning light in the instrument cluster. For you, the light is the visible sign that something is wrong with the restraint system.

After an accident the control unit stores crash data and locks itself. The sensor evaluation runs in the background without you having to do anything.

Why does the control unit 89170-12G70 fail?

The most common cause is crash data stored after an accident, even without a triggered airbag. Aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes are also involved.

Crash data cannot be erased with a standard diagnostic tool. It remains stored in the unit and is detected again at every readout.

The remaining causes concern the electronics and the connections. An examination shows in each case which of them applies.

How can you tell that the 89170-12G70 is defective?

Typical signs are:

• the airbag warning light stays on permanently or intermittently
• an error message appears in the instrument cluster
• the diagnostic tool gets no connection to the control unit
• the fault memory cannot be cleared

With these signs, airbags and seatbelt pretensioners may not trigger in an emergency.

The warning light reports a detected fault, no matter how long it stays on. That is why you should take the indication seriously.

A missing connection to the diagnostic tool does not necessarily mean a fault in the control unit. Reading out the fault memory provides information on this.

Which vehicles is the 89170-12G70 fitted in?

The control unit 89170-12G70 is fitted in these vehicles: Toyota Corolla E170 (2013-2018).

Below you see the models that are recorded for this control unit in our data.

• Toyota Corolla E170 (2013-2018)

Compare the part number on the label of the removed unit with this page. This only ensures that it is the right unit. Have the fault memory read out before removal. Only this log shows whether the control unit is defective or whether a connector 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 89170-12G70 work?

First have the fault memory read out and attach the log. Then disconnect the battery, and only after that remove the control unit. Then create a repair order online and send in the well-packed unit.

This order is mandatory for safety reasons. It must not be reversed even if the unit can be removed easily.

Airbag24 checks the unit on the test bench and replaces defective components. Stored crash data is erased, followed by the function test. For testing, repairing and checking, Airbag24 usually needs 3–4 working days. Afterwards your own unit goes back 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 89170-12G70 get to Airbag24?

You send the control unit 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 shock-proof.