Airbag control unit with part number 89170-0C080

What does the airbag control unit 89170-0C080 do?

The airbag control unit 89170-0C080 is the central control unit of the restraint system (SRS) of Toyota. It evaluates the signals from the impact sensors, decides within milliseconds in a crash which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. It shows faults via the airbag warning light.

The evaluation runs in the background while the vehicle is being driven. So that the restraint system works reliably in an emergency, the control unit checks the connected components continuously. Seatbelt pretensioners are also activated via the unit, so it is responsible for the entire protection chain.

After an accident, the unit stores crash data and locks itself. The lock is only lifted by the repair.

Why does the control unit 89170-0C080 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data cannot be erased with a normal diagnostic tool. At Airbag24 it is erased as part of the repair. The other causes at a glance:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or a jump start

How can you tell that the 89170-0C080 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. In addition there may be a fault message in the instrument cluster, no connection between the diagnostic tool and the control unit, and a fault memory that cannot be cleared.

While the fault persists, airbags and seatbelt pretensioners may not deploy in an emergency. That is why the warning light is the first thing you should pay attention to.

The light shows that there is a fault, but it does not necessarily say which component is affected. For that, the fault memory needs to be read out, which you should have done before removal.

Which vehicles is the 89170-0C080 fitted in?

The airbag control unit 89170-0C080 is fitted in these vehicles: Toyota Tundra K20 (2000-2006).

The following overview lists the vehicles stored for this part number.

• Toyota Tundra K20 (2000-2006)

Compare the part number on the label of the removed unit with this page. This only confirms that it is the correct unit. Also have the fault memory read out beforehand, because only that 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 89170-0C050, 89170-0C060.

How does the repair of the 89170-0C080 work?

First have the fault memory read out and enclose the log, then disconnect the battery and remove the control unit. Then create a repair order online and send the unit in well packed.

At Airbag24 the unit is checked on the test bench. Defective components are replaced, stored crash data is erased and a function test is carried out. The unit then goes back to you.

Processing at Airbag24 usually takes 3–4 working days. 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 89170-0C080 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Put the printed repair order in the parcel and pack the control unit shock-proof. The consignment is then ready to ship.