Airbag control unit with part number 89170-02090

What does the airbag control unit 89170-02090 do?

The airbag control unit 89170-02090 is the central control unit of the restraint system (SRS) for Toyota. It processes the signals from the crash sensors and decides in an emergency which airbags and seatbelt pretensioners are triggered.

The unit monitors the system continuously and reports faults via the airbag warning light. This way you always know whether the restraint system is ready.

After an accident it stores crash data and locks itself. The lock is only lifted by the repair.

Why does the control unit 89170-02090 fail?

On the 89170-02090, the most common cause is crash data stored after an accident, even if no airbag has deployed. This data remains stored even with a normal diagnostic tool. Other causes are ageing electronic components, cold solder joints, moisture at plug connections and voltage spikes.

Airbag24 erases the crash data during the repair. A normal diagnosis cannot carry out this erasure.

Voltage spikes occur, for example, with a weak battery or when jump-starting. The other causes only become apparent on the unit after a close inspection.

How can you tell that the 89170-02090 is defective?

A defect in the 89170-02090 shows up through the airbag warning light, if it stays on permanently or intermittently, as well as through an error message and a diagnostic tool that cannot connect. A fault memory that cannot be cleared is also a sign.

Typical signs at a glance:

• The airbag warning light stays on permanently or intermittently.
• The instrument cluster shows an error message.
• The diagnostic tool cannot connect to the control unit.
• The fault memory cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may not be triggered. Please take the warning seriously.

Which vehicles is the 89170-02090 fitted in?

The 89170-02090 is fitted in these vehicles: Toyota Corolla E120 (2001-2004) and E120 Facelift (2004-2007).

The vehicles for this unit are listed here:

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

Check the part number on the label of the removed unit against this page, so you can be sure it is the right unit. Also have the fault memory read out, because only the result shows whether the control unit is defective or whether plugs and cables are 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 89170-02090 work?

First, read out the fault memory and enclose the log. Only then disconnect the battery and remove the control unit. Then create a repair order online and send the unit in well packed.

Airbag24 tests the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. Processing at Airbag24 usually takes 3–4 working days. After that, 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 89170-02090 get to Airbag24?

You send in the control unit 89170-02090 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 the unit is packed shock-proof.