Airbag control unit with part number 89170-0E230

What does the airbag control unit 89170-0E230 do?

The airbag control unit 89170-0E230 is the central control unit of the restraint system (SRS) for Toyota. It evaluates the signals from the 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 control unit monitors its circuits permanently and displays faults via the airbag warning light.

The lock is only lifted by the repair.

Why does the control unit 89170-0E230 fail?

The most common cause lies in crash data from an accident, even if no airbag has fired. These data cannot be erased with a normal diagnostic tool. Aging components, cold solder joints, moisture and corrosion as well as voltage spikes are also possible.

The records remain in the control unit, even if the airbags showed no visible damage.

The other causes concern aging, connection problems and electrical stress. Moisture and corrosion attack plug connections.

Voltage spikes, for example from a weak battery or after a jump-start, stress the electronics.

How can you tell that the 89170-0E230 is defective?

On the dashboard you recognise the defect by the airbag warning light, which stays on permanently or intermittently. Further signs include a fault message in the instrument cluster, a missing connection to the diagnostic tool and a fault memory that cannot be erased.

Then airbags and seatbelt pretensioners may not be able to trigger in an emergency.

Whether the light stays on continuously or only at times says nothing yet about the cause. For that, the fault memory has to be read out.

Which vehicles is the 89170-0E230 fitted in?

The 89170-0E230 is fitted in these vehicles: Toyota Highlander XU70 (from 2019).

For orientation, here is the overview of vehicles for this number:

• Toyota Highlander XU70 (from 2019)

Compare the part number on the label of the removed unit with this page. This only shows that you have the right unit in front of you. Have the fault memory read out beforehand, because only that result shows whether the control unit is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-0E690.

How does the repair of the 89170-0E230 work?

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

Airbag24 examines the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. The 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 89170-0E230 get to Airbag24?

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

Pack the control unit shock-proof and place the printed repair order in the parcel.