Airbag control unit with part number 89170-0DE40

What does the airbag control unit 89170-0DE40 do?

The airbag control unit 89170-0DE40 coordinates the restraint system (SRS) for Toyota. It reads the crash sensors, selects the airbags and seatbelt pretensioners to be triggered within milliseconds in a crash, and monitors the system without interruption.

Faults are indicated by the airbag warning light. After an accident it stores crash data and then remains locked.

While driving, you normally notice nothing of this monitoring.

Why does the control unit 89170-0DE40 fail?

With the 89170-0DE40, stored crash data is the most common cause, even when no airbag has been triggered. Other causes are also possible, in brief:

• ageing electronic components
• cold solder joints
• moisture and corrosion at plug connectors
• voltage spikes, for example from a weak battery or a jump start

Crash data cannot be erased with a standard diagnostic tool. Airbag24 erases it during the repair, together with checking the other points.

How can you tell that the 89170-0DE40 is defective?

The airbag warning light in the instrument cluster indicates the fault by staying on permanently or intermittently. Typical signs are also fault messages, a missing connection to the diagnostic tool and a fault memory that cannot be cleared.

• airbag warning light on permanently or intermittently
• fault message in the instrument cluster
• diagnostic tool receives no connection to the control unit
• fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

Which vehicles is the 89170-0DE40 fitted in?

The list of models shows where the 89170-0DE40 is used. The control unit 89170-0DE40 is fitted in these vehicles: Toyota Yaris XP210 (from 2020).

Overview of the models:

• Toyota Yaris XP210 (from 2020)

If the part number on the label of the removed unit matches this page, that is only proof that it is the right unit. Please also have the fault memory read out beforehand, because only the result shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-0D730, 89170-0DE60, 89170-0DF50, 89170-52350, 89170-K0060.

How does the repair of the 89170-0DE40 work?

Have the fault memory read out and attach the log to the unit, then disconnect the battery, remove the control unit 89170-0DE40 and create the repair order online. Pack the unit well and send it in. At Airbag24 processing usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components, erases the stored crash data and carries out a function test before the unit 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 89170-0DE40 get to Airbag24?

You send the 89170-0DE40 as a parcel, or you have it collected by UPS for an extra charge. Airbag24 sends the unit back to you via UPS after the repair.

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