Airbag control unit with part number 89170-0DA70

What does the airbag control unit 89170-0DA70 do?

The airbag control unit 89170-0DA70 coordinates the restraint system (SRS) as the central unit for Toyota. It records the values from the crash sensors, determines in an accident which airbags and seatbelt pretensioners fire, and checks the system continuously. If it detects a fault, it reports this via the airbag warning light.

Monitoring runs in the background and is the prerequisite for faults to become visible in good time.

After an accident, the unit stores crash data and locks itself.

Why does the control unit 89170-0DA70 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. A normal diagnostic tool cannot erase this data. Other causes are aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

In detail, these further causes are possible:

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

The test shows which cause applies.

How can you tell that the 89170-0DA70 is defective?

A defect in the 89170-0DA70 shows up as the airbag warning light in the instrument cluster. In addition, there are error messages, a lost connection to the diagnostic tool, and a fault memory that cannot be cleared.

The signs at a glance:

• airbag warning light stays on permanently or intermittently
• error message in the instrument cluster
• diagnostic tool finds no connection to the control unit
• fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may not deploy. A finding of this kind should therefore be checked promptly.

Which vehicles is the 89170-0DA70 fitted in?

The control unit 89170-0DA70 is fitted in vehicles from Toyota: Toyota Yaris XP130 2nd Facelift (2017-2020), XP130 (2010-2014) and XP130 1st Facelift (2014-2017).

Here are the vehicles at a glance:

• Toyota Yaris XP130 2nd Facelift (2017-2020)
• Toyota Yaris XP130 (2010-2014)
• Toyota Yaris XP130 1st Facelift (2014-2017)

Comparing the part number on the label with this page only confirms that it is the right unit. Whether the control unit is defective or a plug or cable is the cause only shows in the fault memory, which you should have read out beforehand.

For the same vehicles, we also repair control units with the part numbers 2310009950, 89170-0D300, 89170-0D320, 89170-0D590, 89170-0D600, 89170-0D620.

How does the repair of the 89170-0DA70 work?

You have the fault memory read out and attach the log before you disconnect the battery. Only then do you remove the control unit. Next, you create a repair order online and send in the well-packed unit.

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

Processing at Airbag24 usually takes 3–4 working days; that time covers no more than the inspection, repair and testing. 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 89170-0DA70 get to Airbag24?

You send the control unit 89170-0DA70 in as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

The printed repair order goes into the parcel, and the unit must be packed shockproof.