Airbag control unit with part number 89170-26670

What does the airbag control unit 89170-26670 do?

The airbag control unit 89170-26670 controls the restraint system (SRS) in Toyota. It evaluates the crash sensors, decides in an accident within milliseconds which airbags and seatbelt pretensioners are triggered, and checks the system continuously. It shows detected faults via the airbag warning light.

After an accident the unit stores crash data and locks itself. The lock is part of the system logic and is not noticeable in everyday use.

The crash sensors are distributed throughout the vehicle and deliver measured values continuously. The control unit decides on every triggering based on these values.

Why does the control unit 89170-26670 fail?

Stored crash data is the most common cause when the 89170-26670 fails, even if no airbag has deployed. A normal diagnostic tool cannot remove this data. Other possible causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Whether data from an incident is in the memory can only be clarified on the unit itself. The absence of an airbag deployment is not a reliable sign.

The other causes develop over a longer period, for example through ageing or moisture entering the unit. Voltage spikes occur, for example, with a weak battery or when jump-starting. Airbag24 erases the crash data during repair.

How can you tell that the 89170-26670 is defective?

The airbag warning light in the instrument cluster lights up on the 89170-26670 permanently or intermittently. In addition there are fault messages, no connection from the diagnostic tool to the control unit, and a fault memory that cannot be cleared.

The warning light is the most visible indication, and you should take it seriously. In an emergency, airbags and seatbelt pretensioners may possibly not deploy.

If the warning light comes on, have the system checked promptly before you continue using the vehicle in everyday traffic.

Which vehicles is the 89170-26670 fitted in?

The control unit 89170-26670 is fitted in these vehicles: Toyota HiAce H300 (from 2019).

The list shows the vehicles that Airbag24 has assigned to this control unit.

• Toyota HiAce H300 (from 2019)

Compare the part number on the label of the removed unit with this page, so that you can be sure you have the right unit. Have the fault memory read out beforehand, because 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 152100-4560, 89170-42D50.

How does the repair of the 89170-26670 work?

First have the fault memory read out and attach the log, then disconnect the battery. Only then remove the 89170-26670 and create a repair order online before sending the unit in. At Airbag24, checking, repair and testing usually take 3–4 working days.

Airbag24 checks the unit on the test bench, replaces the defective components, erases the stored crash data and carries out a function test. Afterwards your own unit comes 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 89170-26670 get to Airbag24?

You can send the control unit 89170-26670 in as a parcel, or have it collected by UPS for an extra charge. The return to you after repair is made by UPS.

Print out the repair order and put it in the parcel. Pack the unit shock-resistant.