Airbag control unit with part number 89170-02870

What does the airbag control unit 89170-02870 do?

The airbag control unit 89170-02870 is the central control unit of the restraint system (SRS) for Toyota. It processes the crash sensor data, decides in an accident whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After an accident it stores crash data and locks itself.

Monitoring runs permanently. If the unit detects a fault, it reports it via the airbag warning light in the instrument cluster.

The lock after an accident can only be ended by the repair at Airbag24.

Why does the control unit 89170-02870 fail?

Crash data after an accident is the most common cause, even if the airbag was not triggered; a normal diagnostic tool cannot erase it. Aged components, cold solder joints, moisture and corrosion on plugs, and voltage spikes are further causes.

Stored crash data remains in the control unit until someone removes it. At Airbag24 it is erased as part of the repair.

The other causes concern the electronics and their connections, while voltage spikes come from weak batteries or from a jump start on the vehicle electrics.

How can you tell that the 89170-02870 is defective?

A fault shows up as the airbag warning light, which lights up continuously or intermittently, as an error message in the instrument cluster, as a diagnostic tool with no connection, and as a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

• display in the instrument cluster warns of a fault
• connection to the diagnostic tool fails
• fault memory remains even after clearing

Watch the light and, if anything is abnormal, have the fault memory read.

Which vehicles is the 89170-02870 fitted in?

The airbag control unit 89170-02870 is fitted in these vehicles: Toyota Corolla E140 (2006-2013).

The vehicles that match this part number are listed below:

• Toyota Corolla E140 (2006-2013)

Firstly, compare the part number on the label of the removed unit with this page. This only confirms that it is the right unit. Secondly, have the fault memory read beforehand, because only it shows whether the control unit is defective or whether a plug or cable is affected.

For the same vehicles, we also repair control units with the part numbers 89170-0F032, 89170-12160.

How does the repair of the 89170-02870 work?

Before removal, have the fault memory read and attach the log; then disconnect the battery. Only then remove the control unit, create a repair order online and send the unit in packaged. Processing at Airbag24 usually takes 3–4 working days.

In our workshop the unit goes through the test bench, repair and a function test, defective components are replaced and the stored crash data is erased. The unit of your own then comes 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 89170-02870 get to Airbag24?

You send the unit as a parcel to us, or you book a UPS collection for an extra charge. After the repair, Airbag24 returns the control unit 89170-02870 to you by UPS.

Put the printed repair order in the parcel and pack the unit shock-resistant.