Airbag control unit with part number 89170-0D100

What does the airbag control unit 89170-0D100 do?

The airbag control unit 89170-0D100 forms the central control unit of the restraint system (SRS) in the Toyota vehicle. It processes the signals from the crash sensors and decides in an accident within milliseconds which airbags and seatbelt pretensioners are triggered. After an accident, it stores crash data and locks itself; the repair lifts the lock.

The unit monitors the system throughout the entire journey. If it detects a fault, it shows this via the airbag warning light in the instrument cluster.

Besides monitoring, the unit therefore also records events.

Why does the control unit 89170-0D100 fail?

The most common cause is crash data from an earlier accident, even if the airbag did not fire at the time; a diagnostic tool cannot remove it. Also possible are aged components, cold solder joints, moisture and corrosion at plug connections, and voltage peaks, for example from a weak battery or a jump start.

The control unit creates crash data when it registers an event. These entries remain in the memory even if you drive the vehicle normally afterwards. Reading out with a diagnostic tool makes the message visible but does not remove it.

The other causes relate to ageing and the environment. Electronic components age, solder joints can crack, and moisture attacks the contacts. Voltage peaks when starting place additional strain on the electronics.

How can you tell that the 89170-0D100 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently, and an error message appears in the display. If the fault memory cannot be cleared or the diagnostic tool cannot reach the control unit, a defect is likely. Airbags and seatbelt pretensioners may then possibly fail to trigger in an emergency.

The airbag warning light is the most important warning sign the vehicle gives you. A fault that cannot be cleared calls for a check of the memory in the unit.

Which vehicles is the 89170-0D100 fitted in?

The control unit 89170-0D100 is fitted in these vehicles: Toyota Yaris XP10 Facelift (2003-2006).

The following lists which vehicles are stored for this unit.

• Toyota Yaris XP10 Facelift (2003-2006)

Compare the part number on the label of the removed unit with this page. This shows that it is the right unit. Whether the control unit is defective or a cable or plug is the cause is shown only by the fault memory, which you should have read out 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 89170-0D100 work?

When repairing the 89170-0D100, first have the fault memory read out and attach the log. Then disconnect the battery and remove the unit. Create the repair order online and send the unit in, well packed; Airbag24 needs 3–4 working days for processing.

Airbag24 examines the unit on the test bench and repairs defective components. The stored crash data are then erased and a function test is carried out. Your own unit goes back to you afterwards.

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 89170-0D100 get to Airbag24?

You send the control unit 89170-0D100 as a parcel to Airbag24 or book a UPS collection for an extra charge. Airbag24 sends it back to you by UPS after the repair.

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