Airbag control unit with part number 89170-06400

What does the airbag control unit 89170-06400 do?

The airbag control unit 89170-06400 controls the restraint system (SRS) in Toyota vehicles. In an impact it evaluates the sensor signals and triggers the appropriate airbags and seatbelt pretensioners within milliseconds. It also monitors the entire system and reports faults via the airbag warning light.

To do this, the control unit receives measurements from acceleration and impact sensors and decides from them whether an event requires triggering.

After an accident the unit creates crash data and locks itself in this state.

Why does the control unit 89170-06400 fail?

Stored crash data is the most common cause on the 89170-06400: it arises after an accident, even if no airbag was deployed, and a standard diagnostic tool cannot remove it. Further triggers are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or jump-starting.

The storage does not depend on whether an airbag was deployed. The fault memory initially only shows that a fault exists, not its origin.

Aged electronic components and cold solder joints only become apparent under load. Moisture and corrosion at plug connections act over a longer period, and voltage spikes add further strain on the components.

How can you tell that the 89170-06400 is defective?

A defect on the 89170-06400 shows itself when the airbag warning light in the instrument cluster stays on permanently or intermittently, an error message appears, the diagnostic tool cannot establish a connection to the control unit, or the fault memory cannot be cleared. In that case airbags and seatbelt pretensioners may not deploy in an emergency.

An error message is not an incidental finding; it shows that the system has detected a fault.

If the warning light is on, have the system checked promptly, even if the vehicle can still be driven normally.

Which vehicles is the 89170-06400 fitted in?

The 89170-06400 is fitted in these vehicles: Toyota Camry XV50 (2011-2019). Before removal, check whether your model is among them.

The following vehicles are known to us for this part number:

• Toyota Camry XV50 (2011-2019)

Compare the part number on the label of the removed unit with this page; this only ensures that it is the right unit. The comparison does not establish the cause. For that, have the fault memory read out beforehand: only the log shows whether the control unit itself is affected or whether a plug or cable causes the fault.

For the same vehicles, we also repair control units with the part numbers 150800-2310, 89170-06670, 89170-06671, 89170-06770.

How does the repair of the 89170-06400 work?

For the repair of the 89170-06400, first have the fault memory read out and enclose the log. Then disconnect the battery; only then remove the control unit. Next, create a repair order online and send in the unit; processing at Airbag24 usually takes 3–4 working days.

At Airbag24 the unit is checked on the test bench, defective components are repaired, the stored crash data is erased and a function test is run. Your own unit is then sent back to you.

The 3–4 working days apply only to this work 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 89170-06400 get to Airbag24?

You send the 89170-06400 control unit as a parcel or book a UPS collection for an extra charge. The return after the repair is also made by UPS.

The printed repair order belongs in the parcel, and the unit must be packed shock-resistant.