Airbag control unit with part number 89170-02381

What does the airbag control unit 89170-02381 do?

The 89170-02381 is the airbag control unit of the restraint systems (SRS) in Toyota. It evaluates the crash sensors, decides within milliseconds in an emergency whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously. It reports faults via the airbag warning light, and after an accident it stores crash data and locks itself.

The monitoring runs during every journey without you noticing anything. In normal operation, the unit therefore goes unnoticed.

Why does the control unit 89170-02381 fail?

The most common cause is stored crash data after an accident, even if no airbag has deployed. Other causes include ageing, moisture or voltage spikes.

Crash data cannot be erased with a normal diagnostic tool. Airbag24 removes it during the repair.

Other causes at a glance:

• ageing electronic components
• cold solder joints
• moisture and corrosion on plug connections
• voltage spikes, for example from a weak battery or jump-starting

How can you tell that the 89170-02381 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently. In addition there may be a fault message in the instrument cluster, a diagnostic tool without a connection to the control unit, and a fault memory that cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may then fail to trigger. Therefore, arrange a check promptly.

Which vehicles is the 89170-02381 fitted in?

The control unit 89170-02381 is fitted in these vehicles: Toyota Corolla E120 (2001-2004) and E120 Facelift (2004-2007). Your vehicle registration document shows which vehicles of your type are affected.

Here is the list:

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

You compare the part number on the label of the removed unit with this page first. This only confirms that you have the right unit in front of you. Whether the control unit itself is defective, or whether plugs or cables are causing the fault, is shown only by the read-out fault memory.

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 89170-02381 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only afterwards remove the control unit. Create a repair order online and send in the unit well packed. Airbag24 checks it, repairs defective components, erases the crash data and carries out a function test.

At Airbag24, testing, repairing and checking usually takes 3–4 working days. Your own unit is then 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 89170-02381 get to Airbag24?

You can send the unit as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back by UPS.

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