Airbag control unit with part number 89170-0D090

What does the airbag control unit 89170-0D090 do?

The airbag control unit 89170-0D090 forms the control centre of the restraint system (SRS) in the Toyota vehicle. It evaluates the sensor signals, decides in a crash whether to fire the airbags and seatbelt pretensioners, and checks the system continuously. It reports any faults found via the airbag warning light.

In operation the unit works unobtrusively in the background, checking connections and power supply as it does so.

Crash data is created when an accident is registered, and the unit locks itself.

Why does the control unit 89170-0D090 fail?

Crash data from an accident is the most common cause, even without an airbag having triggered; an ordinary diagnostic tool does not erase it. In addition, ageing components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes can affect the unit.

The crash data is stored in the control unit itself. From outside the vehicle, nothing of this can be seen.

Other causes are ageing components, cold solder joints, and moisture and corrosion at plugs. Voltage spikes, for example from a weak battery or a jump start, additionally strain the unit.

How can you tell that the 89170-0D090 is defective?

A defect is indicated by the airbag warning light, which stays on permanently or intermittently, and by an error message in the instrument cluster. In addition, the diagnostic tool lacks a connection to the control unit, and the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

• Airbag warning light stays on permanently
• Airbag warning light comes on intermittently
• Error message in the instrument cluster
• Diagnostic tool receives no connection to the control unit
• Fault memory cannot be cleared

These signs are not harmless, even if the car keeps driving. Have the findings clarified promptly.

Which vehicles is the 89170-0D090 fitted in?

The airbag control unit 89170-0D090 is fitted in these vehicles: Toyota Yaris XP10 Facelift (2003-2006).

The list shows the vehicles known to us for this unit.

• Toyota Yaris XP10 Facelift (2003-2006)

Comparing the part number on the label with this page ensures that you have removed the correct unit. Reading out the fault memory, on the other hand, shows whether the control unit or a plug or cable is the cause. So have both checked beforehand.

For the same vehicles, we also repair control units with the part numbers 2310002470, 89170-0D020, 89170-52040, 89170-52070, 89170-52140, 89170-52780.

How does the repair of the 89170-0D090 work?

First read out the fault memory, attach the log, disconnect the battery and remove the control unit. Then create a repair order online and send the unit in well packed. At Airbag24 processing usually takes 3–4 working days.

At Airbag24 the unit is checked, defective components are replaced, the crash data is deleted and the function is tested. Afterwards your own unit is returned 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 89170-0D090 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. Airbag24 sends it back by UPS after the repair. The repair order is to be printed and placed in the parcel, and the unit is packed shockproof.

Shockproof packaging means: sturdy carton, padding all round, nothing loose inside.