Airbag control unit with part number 89170-0D380

What does the airbag control unit 89170-0D380 do?

The 89170-0D380 is the central control unit of the restraint system (SRS) in Toyota. It evaluates the crash sensors, decides within milliseconds in the event of an accident whether to fire the airbags and seatbelt pretensioners, and monitors the system continuously.

If it detects a fault, it shows this via the airbag warning light in the instrument cluster and stores it in the fault memory. This means the fault remains traceable even after the warning light goes out.

After an accident, the unit stores crash data and locks itself. This state is part of the diagnosis and determines the next steps.

Why does the control unit 89170-0D380 fail?

The most common cause is crash data stored after an accident, even if no airbag was triggered; a normal diagnostic tool cannot erase it. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

Crash data remains stored after an accident even if no airbag fired at all. An ordinary diagnostic tool cannot reach it. Airbag24 erases it during the repair.

The other causes act over a longer period: electronics age, solder joints can go cold, and moisture combined with corrosion attacks plug connectors. Voltage spikes, for example from a weak battery or a jump start, can place additional strain on the unit.

How can you tell that the 89170-0D380 is defective?

Signs include the airbag warning light in the instrument cluster staying on continuously or intermittently, fault messages in the instrument cluster, the diagnostic tool having no 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.

These points belong together: they describe the same condition from different angles. The warning light alone is already reason enough to have the fault memory read out.

Only the fault memory reveals the exact cause. Until then, every indication is a hint and not yet a diagnosis.

Which vehicles is the 89170-0D380 fitted in?

The 89170-0D380 is fitted in these vehicles: Toyota Yaris XP90 (2005-2009) and XP90 Facelift (2009-2011).

The following list shows the vehicles stored for this part number.

• Toyota Yaris XP90 (2005-2009)
• Toyota Yaris XP90 Facelift (2009-2011)

The following steps will help you. Compare the part number on the label of the removed unit with this page, and then you can be sure you have the right unit. Also have the fault memory read out beforehand, because only that shows whether the control unit is defective or whether a plug or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 212986-105, 212986-110, 220749-101, 89170-0D170, 89170-0D230, 89170-0D440.

How does the repair of the 89170-0D380 work?

First have the fault memory read out and enclose the log; then disconnect the battery and only then remove the 89170-0D380. Next, create a repair order online and send in the well-packed unit; Airbag24 tests it on the test bench, replaces defective components, erases the crash data and carries out a function test. Processing at Airbag24 usually takes 3–4 working days.

The steps on the vehicle come first: reading out, the log, disconnecting the battery and removal, in exactly this order. After that, you create the repair order and send the unit off.

At Airbag24 the unit is examined on the test bench, defective components are replaced, and the function test concludes the work. Your own unit is then 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 89170-0D380 get to Airbag24?

You send the 89170-0D380 in as a parcel or book a UPS collection for an extra charge; after the repair Airbag24 returns it to you by UPS.

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