Airbag control unit with part number 89170-02430

What does the airbag control unit 89170-02430 do?

The airbag control unit 89170-02430 is the central unit of the restraint system (SRS) in Toyota. It receives the signals from the crash sensors, selects the appropriate airbags and seatbelt pretensioners within milliseconds in an accident, and monitors the system permanently. It shows faults via the airbag warning light.

During driving, the unit checks whether all components deliver plausible values. It writes any irregularities to the fault memory.

After an accident, it stores crash data and then locks itself. It is therefore also the storage for accident events.

Why does the control unit 89170-02430 fail?

Stored crash data from an accident is the most common cause, even if no airbag has deployed. At the same time, aged components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes are possible triggers. A normal diagnostic tool does not remove the crash data.

The crash data remain as an entry in the unit, so a simple reset is no solution.

The other causes act over time. Electronics age, solder joints lose their stability, moisture reaches the contacts, and voltage spikes occur, for example with a weak battery or jump-starting.

How can you tell that the 89170-02430 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently, and that is the most important sign. In addition, a fault message appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared. In the event of a crash, airbags and seatbelt pretensioners may then possibly not deploy.

Signs like these are no reason for panic, but they are a clear reason to have the system checked. The unit reports the fault itself; an examination shows what is behind it.

Which vehicles is the 89170-02430 fitted in?

The control unit 89170-02430 is fitted in these vehicles: Toyota Corolla E120 (2001-2004) and E120 Facelift (2004-2007). You can match it to your own vehicle using the vehicle registration document and the part number.

The models with this part number are listed here:

• Toyota Corolla E120 (2001-2004)
• Toyota Corolla E120 Facelift (2004-2007)

On the one hand, compare the part number on the label of the removed unit with this page. On the other hand, have the fault memory read out beforehand, because 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 89170-02180, 89170-02240, 89170-02390, 89170-02411, 89170-02G60, 89170-12160.

How does the repair of the 89170-02430 work?

Have the fault memory read out first and attach the log. Then disconnect the battery and remove the control unit 89170-02430. Create the repair order online, then pack and send the unit.

The sequence protects you at every step, so please keep it as it is.

Airbag24 examines the unit on the test bench, repairs the defective components, deletes the crash data and carries out a functional test. Checking, repairing and testing usually take 3–4 working days. Finally, your own unit is sent 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 89170-02430 get to Airbag24?

Either you send the unit in as a parcel, or you book a UPS collection for an extra charge. Airbag24 then sends the repaired unit back to you by UPS.

Put the printed repair order into the parcel and pack the unit shockproof.