Airbag control unit with part number 89170-52630

What does the airbag control unit 89170-52630 do?

The airbag control unit 89170-52630 evaluates the sensor signals within the restraint system (SRS) of Toyota. In an accident it decides within milliseconds which airbags and seatbelt pretensioners are triggered. After an accident, it stores crash data and locks itself.

While the vehicle is driving, the electronics monitor the system continuously. Faults become visible via the airbag warning light in the instrument cluster.

So that the decision is made in time, sensors and evaluation are closely interlinked.

Why does the control unit 89170-52630 fail?

The most common cause is stored crash data that remains in the unit after an accident even without a deployed airbag; a standard diagnostic tool cannot erase it. Further causes are aged electronic components, dry solder joints, moisture on plug connections and voltage spikes.

As long as the data is in memory, the fault condition remains.

The other causes arise from the operation of the unit. Electronic components age over time, solder joints can go cold, and moisture attacks plug connections.

Voltage spikes, for example from a weak battery or a jump start, put additional strain on the circuit. Which trigger applies only becomes clear on examination.

How can you tell that the 89170-52630 is defective?

A defect is recognised by the airbag warning light, when it lights up permanently or intermittently. Fault messages, a diagnostic tool without access to the control unit, or a fault memory that cannot be cleared also indicate a defect. In an emergency, the airbags and seatbelt pretensioners may then not deploy.

Typical signs are:

• airbag warning light that lights up permanently or intermittently
• fault message in the instrument cluster
• diagnostic tool without access to the control unit
• fault memory that cannot be reset

If you notice any of these, arrange a check promptly.

Which vehicles is the 89170-52630 fitted in?

Compare your car with the list. Control unit 89170-52630 is fitted for Toyota in these vehicles: Toyota Yaris XP90 (2005-2009) and XP90 Facelift (2009-2011).

The following models are on record:

• Toyota Yaris XP90 (2005-2009)
• Toyota Yaris XP90 Facelift (2009-2011)

Comparing the part number on the removed unit with this page only confirms the identity of the unit. The fault memory read out is decisive for the cause, because it 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 212986-105, 212986-110, 220749-101, 89170-0D160, 89170-0D170, 89170-0D180.

How does the repair of the 89170-52630 work?

Airbag24 usually needs 3–4 working days for testing, repair and function checks. First you read out the fault memory and enclose the log. Then you disconnect the battery, remove the unit and create the repair order online.

The order protects you: only once the fault memory has been read and the battery disconnected is removal safe. Then pack the unit well.

At Airbag24 the unit is checked on the test bench, defective components are repaired, crash data is erased and a function test is carried out. Your own unit then returns 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 89170-52630 get to Airbag24?

You send the unit as a parcel or book a UPS collection. After the repair, Airbag24 sends it back via UPS.

Put the printed repair order into the parcel. Wrap the control unit so that it is shock-proof.