Airbag control unit with part number 89170-52G52

What does the airbag control unit 89170-52G52 do?

The control unit 89170-52G52 manages the restraint system (SRS) at Toyota. Via the crash sensors it measures deceleration, decides within a fraction of a second whether to trigger airbags and seatbelt pretensioners in an accident, and monitors the system at all times. Faults are reported via the airbag warning light.

In doing so it works together with the signals of several sensors that monitor the vehicle at different points.

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

Why does the control unit 89170-52G52 fail?

In the 89170-52G52, the most common cause is crash data stored in the unit after an accident, even if no airbag has deployed. A conventional diagnostic tool cannot clear it. Other causes are aged components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

The fact that no airbag has deployed therefore does not mean the unit has stored no data. The storage happens independently of deployment.

The other causes mainly concern the electronics and their surroundings. Components age, solder joints can go cold, and moisture attacks contacts. Airbag24 clears the crash data during the repair.

How can you tell that the 89170-52G52 is defective?

If you suspect a fault in the 89170-52G52, first look at the airbag warning light in the instrument cluster. It lights up permanently or intermittently. The picture is completed by a fault message in the instrument cluster, by a diagnostic tool with no connection to the control unit, and by a fault memory that cannot be cleared.

• Airbag warning light on permanently or intermittently
• Fault 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 then fail to deploy. Please have the fault checked promptly.

Which vehicles is the 89170-52G52 fitted in?

Fitting the control unit 89170-52G52 concerns these vehicles: Toyota Yaris XP130 2nd Facelift (2017-2020), XP130 (2010-2014) and XP130 1st Facelift (2014-2017).

Here is the overview of the allocation:

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

Comparing the part number with the label on the removed unit only confirms that it is the right unit. Only reading out the fault memory beforehand shows whether the control unit is defective or whether the fault lies in a plug or a cable.

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 89170-52G52 work?

For the repair of the 89170-52G52, first read out the fault memory and enclose the log. Then disconnect the battery and only then remove the control unit. In the next step create the repair order online, pack the unit carefully and send it in; processing at Airbag24 usually takes 3–4 working days.

The sequence is prescribed for safety reasons.

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 89170-52G52 get to Airbag24?

You send the control unit 89170-52G52 as a parcel, or for an extra charge you arrange a UPS collection. Airbag24 sends it back by UPS after the repair. The printed repair order belongs in the package, and the unit must be packed shock-resistant.

A suitable box with padding prevents the control unit from taking knocks during transport.