Airbag control unit with part number 89170-02830

What does the airbag control unit 89170-02830 do?

The airbag control unit 89170-02830 is the central control unit of the SRS at Toyota. It checks the signals from the crash sensors, decides in a collision whether the airbags and seatbelt pretensioners are triggered, and monitors the system continuously. It indicates faults via the airbag warning light.

The decision is made in fractions of a second, because in an accident there is no time for deliberation.

After an accident the unit writes crash data to its memory and locks itself. The system is therefore one of the safety-relevant components in the vehicle.

Why does the control unit 89170-02830 fail?

Stored crash data is the most common cause, even if no airbag was triggered. A normal diagnostic tool cannot erase it. Other causes include aged electronics, cold solder joints, moisture, corrosion on plugs and voltage spikes.

The crash data is part of the memory, which the unit does not empty by itself after an accident.

Aged electronics, cold solder joints and moisture tend to act gradually, whereas voltage spikes come on suddenly. A weak battery or a jump start can cause such spikes.

How can you tell that the 89170-02830 is defective?

A defect shows itself through the airbag warning light in the instrument cluster, which lights up permanently or intermittently. A fault message may also appear, or the diagnostic tool cannot establish a connection to the control unit.

• Airbag warning light lit permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool fails to establish a connection
• Fault memory that cannot be cleared

In an emergency, airbags and seatbelt pretensioners may then fail to trigger. Have the warning light checked promptly.

Which vehicles is the 89170-02830 fitted in?

The control unit 89170-02830 is fitted in these vehicles: Toyota Corolla E140 (2006-2013). The information is based on the part number.

The following vehicles are listed:

• Toyota Corolla E140 (2006-2013)

First compare the part number on the label of the removed unit with this page. This only tells you that it is the right unit. Also have the fault memory read out before removal. 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 89170-0F032, 89170-12160.

How does the repair of the 89170-02830 work?

First have the fault memory read out and enclose the report. Then disconnect the battery. Only then remove the control unit, before creating the repair order online.

At Airbag24 the unit you send in is checked, defective components are replaced where necessary, the crash data is erased and a function test is carried out. Checking, repair and testing usually take 3–4 working days. 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 89170-02830 get to Airbag24?

You can send the unit in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

The printed repair order goes into the parcel, and you pack the unit shock-proof.