Airbag control unit with part number 89170-42D60

What does the airbag control unit 89170-42D60 do?

The airbag control unit 89170-42D60 acts as the SRS control unit of the restraint system in Toyota. It processes the readings from the crash sensors and decides within a few milliseconds in an accident which airbags and seatbelt pretensioners are triggered.

Beyond that, it monitors all components of the system continuously. If it detects a fault, it reports it via the airbag warning light.

After an accident, crash data is stored in the unit, after which it locks itself.

Why does the control unit 89170-42D60 fail?

The most common cause for the control unit 89170-42D60: crash data stored after an accident, even without an airbag having deployed. Other causes come into consideration as well: aged electronic components, cold solder joints, moisture or corrosion at plug connections, and voltage spikes.

A standard diagnostic tool cannot delete this crash data. Reading out the fault memory alone therefore changes nothing about the cause.

Voltage spikes arise, for example, with a weak battery or when a jump start is given. Aged components and damp plugs can additionally impair the function.

How can you tell that the 89170-42D60 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently. In addition, the instrument cluster shows an error message, the diagnostic tool does not reach the control unit 89170-42D60, and the fault memory cannot be cleared.

The airbag warning light therefore indicates every fault the system detects. In an emergency, airbags and seatbelt pretensioners may not trigger, and this is exactly what the light points to.

Which vehicles is the 89170-42D60 fitted in?

The control unit 89170-42D60 is fitted in these vehicles: Toyota RAV4 XA50 (from 2018). Which version is installed in your car is only clarified by comparing the part number.

The assignment at a glance:

• Toyota RAV4 XA50 (from 2018)

Compare the part number on the label of the removed unit with this page. This only ensures that it is the correct unit. Have the fault memory read out beforehand, because it shows whether the control unit is defective or a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 150800-4431, 152100-0262, 152100-4560, 89170-42400, 89170-42870, 89170-42A60.

How does the repair of the 89170-42D60 work?

First read out the fault memory and enclose the log. Then disconnect the battery and only then remove the control unit 89170-42D60. Next create the repair order online and send the well-packed unit in.

Airbag24 inspects the unit on the test bench, repairs defective components, deletes stored crash data and carries out a function test. Your own unit is then sent back. Inspection, repair and function test usually take 3–4 working days at Airbag24.

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 89170-42D60 get to Airbag24?

You send the control unit 89170-42D60 as a parcel, or book a UPS collection for an extra charge. After the repair Airbag24 sends it back by UPS.

Enclose the printed repair order and pack the unit shock-proof.