Airbag control unit with part number 89170-02481

What does the airbag control unit 89170-02481 do?

As an SRS control unit, the airbag control unit 89170-02481 controls the restraint system of Toyota. It reads the crash sensors, determines in a crash within fractions of a second which airbags and seatbelt pretensioners are triggered, and keeps the entire system under constant watch.

Detected faults appear on the airbag warning light in the instrument cluster, so the state of the system is visible.

After an accident, the unit stores crash data and locks itself. In everyday driving the control unit goes unnoticed, because it works invisibly in the background.

Why does the control unit 89170-02481 fail?

The most common cause is crash data stored after an accident, even if no airbag has triggered; a usual diagnostic tool cannot erase it. Other causes are summarised below:

Crash data is created in the background and cannot be seen from outside. A vehicle can therefore appear completely unremarkable after an incident.

• ageing electronics
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or a jump start

How can you tell that the 89170-02481 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and the instrument cluster displays a fault message. A diagnostic tool finds no connection to the control unit 89170-02481, or the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

The warning light does not stay silent; it shows the fault. It is therefore worth taking the message seriously and acting promptly.

Which vehicles is the 89170-02481 fitted in?

This control unit 89170-02481 is fitted in these vehicles: Toyota Corolla E120 (2001-2004) and E120 Facelift (2004-2007).

The list of vehicles is shown here:

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

Comparing the part number on the label of the removed unit with this page only confirms that you have the right unit. The read-out fault memory 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 89170-02481 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only afterwards remove the control unit 89170-02481. Next, create a repair order online and send the unit in well packed.

Airbag24 checks the unit on the test bench, replaces defective components, erases the stored crash data and carries out a function test. Afterwards the unit goes back to you.

Processing at Airbag24 usually takes 3–4 working days. 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 89170-02481 get to Airbag24?

You send the control unit 89170-02481 to Airbag24 as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

Put the printed repair order into the parcel and pack the unit shock-proof.