Airbag control unit with part number 89170-52C00

What does the airbag control unit 89170-52C00 do?

The airbag control unit 89170-52C00 is the central control unit of the restraint system (SRS) of Toyota. It processes the signals from the crash sensors and decides in an accident within milliseconds which airbags and seatbelt pretensioners are triggered. The system is monitored continuously; faults are shown via the airbag warning light.

After an accident the unit stores crash data and locks itself. This function is one of its basic tasks and must be considered at every later examination.

Why does the control unit 89170-52C00 fail?

Crash data stored after an accident is the most common cause on the 89170-52C00, even if no airbag was deployed. Ageing components, cold solder joints, moisture at plug connections and voltage spikes come on top.

A normal diagnostic tool cannot erase crash data. Airbag24 removes it as part of the repair.

The other causes concern the electronics and their connections. Voltage spikes arise, for example, during jump-starting or with a weak battery.

How can you tell that the 89170-52C00 is defective?

A defect on the 89170-52C00 can be recognised by the airbag warning light in the instrument cluster, which lights up permanently or intermittently. A fault message in the instrument cluster and a missing connection to the diagnostic tool also point to a fault.

In an emergency, airbags and seatbelt pretensioners may not deploy in the event of a defect. Typical signs at a glance:

• Airbag warning light stays on permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool cannot establish a connection to the control unit
• Fault memory cannot be cleared

Which vehicles is the 89170-52C00 fitted in?

Before removal, compare your vehicle with the list. The control unit 89170-52C00 is fitted in these vehicles: Toyota Yaris XP90 (2005-2009) and XP90 Facelift (2009-2011).

The vehicles in detail:

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

Compare the part number on the label of the unit with this page, and you will know that you have the right unit. The fault memory must be read out beforehand: only it shows whether the control unit is defective or a plug or cable is responsible.

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 89170-52C00 work?

First have the fault memory read out and attach the log. Then disconnect the battery and only afterwards remove the control unit 89170-52C00. Then create a repair order online.

This procedure serves your safety and is therefore mandatory.

Airbag24 checks the unit on the test bench, repairs or replaces defective components, erases the stored crash data and carries out a function test. Processing usually takes 3–4 working days. Your own unit then goes 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 89170-52C00 get to Airbag24?

Send your 89170-52C00 to Airbag24 as a parcel, or book a UPS collection for an extra charge. The return after the repair is made by UPS.

Pack the unit shock-proof and enclose the printed repair order.