Airbag control unit with part number 89170-60550

What does the airbag control unit 89170-60550 do?

The airbag control unit 89170-60550 is the central control unit of the SRS restraint system in Toyota. It evaluates the crash sensors, decides within milliseconds in an accident which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After an accident it stores crash data and locks itself.

If the control unit detects a fault, it shows this via the airbag warning light in the instrument cluster.

Without the control unit, the remaining components no longer work together in a controlled way in an emergency.

Why does the control unit 89170-60550 fail?

Most often the fault lies in crash data that was stored after an accident, even if no airbag has deployed. A normal diagnostic tool cannot erase it. Other causes include aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes from a weak battery or a jump start.

The link to the accident is therefore not always obvious.

The other causes affect the electronics itself. Ageing components, cold solder joints and corrosion gradually impair the function, whereas voltage spikes can disrupt it suddenly.

How can you tell that the 89170-60550 is defective?

A defect shows itself through the airbag warning light, an error message in the instrument cluster, a missing connection to the diagnostic tool, and a fault memory that cannot be cleared.

These signs in detail:

• Airbag warning light on permanently or intermittently
• Error message in the instrument cluster
• Diagnostic tool without a connection to the control unit
• Fault memory cannot be cleared

In an emergency, the airbags and seatbelt pretensioners may then fail to deploy. A lit warning light is therefore the visible sign; please have it checked promptly.

Which vehicles is the 89170-60550 fitted in?

The control unit 89170-60550 is fitted in these vehicles: Toyota Prado J150 1st Facelift (2013-2015), J150 2nd Facelift (2015-2018), J150 3rd Facelift (2018-2024) and J150 (2009-2013).

The list of models reads as follows:

• Toyota Prado J150 1st Facelift (2013-2015)
• Toyota Prado J150 2nd Facelift (2015-2018)
• Toyota Prado J150 3rd Facelift (2018-2024)
• Toyota Prado J150 (2009-2013)

Matching the part number on the label with this page only confirms that it is the right unit. Whether the control unit is defective or a plug or cable is the cause only becomes clear from the fault memory, which you have read out beforehand.

For the same vehicles, we also repair control units with the part numbers 150300-2965, 89170-60540, 89170-60630, 89170-60631.

How does the repair of the 89170-60550 work?

You read out the fault memory first, attach the log, and then disconnect the battery. Only then do you remove the control unit and create the repair order online. Afterwards you pack the unit well and send it in; Airbag24 usually processes it within 3–4 working days.

Airbag24 then checks the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. Your own unit is then sent back to you.

The 3–4 working days apply only to checking, repairing and testing. 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 89170-60550 get to Airbag24?

Either you send the unit as a parcel, or you book a UPS collection for an extra charge. Airbag24 returns the unit to you via UPS after the repair.

The printed repair order goes into the parcel. Pack the unit so that it withstands knocks.