Airbag control unit with part number 89170-0D390

What does the airbag control unit 89170-0D390 do?

The airbag control unit 89170-0D390 is the central control unit of the restraint system (SRS) for Toyota. It evaluates the signals from the crash sensors, decides within a fraction of a second in the event of an accident which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. It reports faults via the airbag warning light.

The unit is therefore on standby at all times in everyday driving, even if the driver notices nothing of it.

After an accident, it stores crash data and locks itself.

Why does the control unit 89170-0D390 fail?

The cause is most often crash data stored after an accident, even if no airbag has been triggered. Other causes can be aged components, cold solder joints, moisture, corrosion and voltage spikes. With this control unit, the crash data often cannot be deleted. If you would like the crash data deleted, get in touch with Airbag24 briefly before sending the unit in.

Crash data remains stored in the unit after an accident, even if no airbag has deployed.

The other causes concern the electronics and the connections. Aged components and cold solder joints are among them, as are moisture and corrosion at plug connections. Voltage spikes, for example from a weak battery or a jump start, can also strain the unit.

How can you tell that the 89170-0D390 is defective?

The airbag warning light in the instrument cluster lights up continuously or intermittently as soon as a fault is present in the system. Also present are a fault message in the instrument cluster, a diagnostic tool without a connection to the control unit, and a fault memory that cannot be deleted.

With such a finding, the airbags and seatbelt pretensioners may not trigger in an emergency. Take the warning seriously and have the system checked.

Which vehicles is the 89170-0D390 fitted in?

The control unit 89170-0D390 is fitted in these vehicles: Toyota Yaris XP90 (2005-2009) and XP90 Facelift (2009-2011). To check whether your own unit fits, compare the part number on the label.

The vehicles are listed in detail below:

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

Compare the part number on the label of the removed unit with this page. This only confirms that it is the right unit. Also have the fault memory read out, as 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, 89170-0D160, 89170-0D170, 89170-0D180.

How does the repair of the 89170-0D390 work?

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

Airbag24 checks the unit on the test bench, repairs defective components and carries out a function test. Your own unit is then returned to you. Processing at Airbag24 usually takes 3–4 working days. If you would like the crash data deleted, get in touch with Airbag24 briefly before sending the unit in.

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 89170-0D390 get to Airbag24?

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

Put the printed repair order into the parcel and pack the unit shockproof, so that it survives transport undamaged.