Airbag control unit with part number 89170-26420

What does the airbag control unit 89170-26420 do?

The airbag control unit 89170-26420 is the central control unit of the restraint system (SRS) at Toyota. It processes the signals of the impact sensors and decides in an emergency, in fractions of a second, which airbags and seatbelt pretensioners are triggered. After an accident it stores crash data and locks itself.

During operation the unit monitors the sensors, the wiring and the firing circuits of the airbags and seatbelt pretensioners. It shows detected faults via the airbag warning light in the instrument cluster.

The processing runs inside the unit; for the driver, only the result in the instrument cluster is visible.

Why does the control unit 89170-26420 fail?

The most common cause on the 89170-26420 is crash data stored after an accident, even if no airbag has deployed. This data cannot be erased with a normal diagnostic tool. Aged electronics, moisture and corrosion, and voltage spikes are also possible causes.

• Aged electronic components
• Cold solder joints
• Moisture and corrosion at plug connections
• Voltage spikes, for example from a weak battery

Airbag24 removes the crash data during the repair.

How can you tell that the 89170-26420 is defective?

The airbag warning light in the instrument cluster indicates a defect by lighting up permanently or intermittently. In addition an error message appears, and the diagnostic tool cannot reach the control unit. In an emergency, airbags and seatbelt pretensioners may not deploy.

The fault memory cannot be cleared, and that is one of the signs.

Which vehicles is the 89170-26420 fitted in?

The airbag control unit 89170-26420 is fitted at Toyota in these models: Toyota HiAce H300 (from 2019).

The next line shows the models in the overview.

• Toyota HiAce H300 (from 2019)

Compare the part number on the label of the removed unit with this page; that only tells you that it is the matching unit. Have the fault memory read out beforehand, because only the result shows whether the control unit is defective or a plug or cable is responsible.

For the same vehicles, we also repair control units with the part numbers 152100-4560, 89170-42D50.

How does the repair of the 89170-26420 work?

At the start is the read-out of the fault memory; the log goes into the parcel. Then disconnect the battery and only afterwards remove the control unit 89170-26420. The end is the online repair order together with the well-packed unit.

At Airbag24 the unit is checked by running it on the test bench. Defective components are replaced, and the crash data is then erased.

Processing usually takes 3–4 working days, and this period covers only 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 89170-26420 get to Airbag24?

You either send the control unit 89170-26420 as a parcel, or you book a UPS collection for an extra charge. The own unit is likewise returned by UPS after the repair.

Make sure the printed repair order is enclosed and the unit is packed shock-proof.