Airbag control unit with part number 89170-52D60

What does the airbag control unit 89170-52D60 do?

The airbag control unit 89170-52D60 coordinates the restraint system (SRS) for Toyota. It processes the measured values from the crash sensors and, in an accident, decides within milliseconds which airbags and seatbelt pretensioners fire.

The control unit checks the system for faults during the entire journey. If a fault is detected, it switches on the airbag warning light in the instrument cluster so that the driver notices the warning.

After an accident the control unit stores crash data and locks itself in the process. This information remains in the memory.

Why does the control unit 89170-52D60 fail?

The cause most often lies in crash data stored after an accident, even when no airbag has deployed. A conventional diagnostic tool cannot remove them. Further triggers are aged electronics, cold solder joints, moisture or corrosion at plug connectors, and voltage spikes such as with a weak battery or a jump start.

Stored crash data remains in the unit because the standard read-out only reaches the fault memory. Airbag24 removes this data during the repair, so that the unit can work normally again afterwards.

Aged components and contact problems can show up irregularly. Moisture and corrosion at plug connectors cause transition resistances that are hard to pin down in everyday use.

How can you tell that the 89170-52D60 is defective?

The airbag warning light in the instrument cluster stays on permanently or flickers intermittently, and an error message also appears in the instrument cluster. In addition, a diagnostic tool cannot establish a connection to the control unit, and the fault memory cannot be cleared.

If the warning light stays on permanently, have the system checked. In an emergency, airbags and seatbelt pretensioners may possibly not deploy, which is why the warning should be taken seriously.

If there is no connection to the diagnostic tool, that points to a problem with the control unit or the wiring to it. Only the read-out of the fault memory shows whether the unit is actually affected.

Which vehicles is the 89170-52D60 fitted in?

The control unit 89170-52D60 is used in these vehicles: Toyota Yaris XP90 (2005-2009) and XP90 Facelift (2009-2011).

These models and versions are assigned to the part number:

• 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. That only ensures that you have the right unit in front of you. Whether the control unit is defective or a plug or wire is causing the fault is only clarified by reading out the fault memory beforehand.

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 89170-52D60 work?

First read out the fault memory and attach the log to the unit. Then disconnect the battery, and only after that remove the control unit. Processing at Airbag24 generally takes 3–4 working days for checking, repairing and testing.

After that you create a repair order online and pack the unit carefully for shipment to Airbag24. The fixed sequence protects you from unnecessary risks during removal.

Airbag24 examines the submitted unit on the test bench and repairs defective components. The stored crash data is erased, then a function test follows before your own unit is 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 89170-52D60 get to Airbag24?

You send the unit to Airbag24 as a parcel, or book a UPS collection for an extra charge. The return after the repair is made by UPS.

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