Airbag control unit with part number 89170-0C230

What does the airbag control unit 89170-0C230 do?

The airbag control unit 89170-0C230 coordinates the restraint system (SRS) for Toyota. It processes the signals from the crash sensors and decides in an accident, within milliseconds, which airbags and seatbelt pretensioners are triggered. At the same time, it monitors the system continuously and reports faults via the airbag warning light.

Monitoring covers the sensors, the wiring and the triggering itself. If the unit detects an irregularity, it creates an entry in the fault memory.

After an accident, the unit stores crash data and locks itself.

Why does the control unit 89170-0C230 fail?

Stored crash data from an accident is the most common cause, even if no airbag has fired, and a standard diagnostic tool cannot erase it. Other causes include ageing electronic components, cold solder joints, moisture and corrosion on plug connectors, and voltage spikes from a weak battery or a jump start.

Crash data stays in the memory even when the vehicle drives normally again after the accident. It is therefore worth thinking of the accident during fault finding, even if it was minor.

The other causes relate to the electronics themselves. Ageing, corrosion and moisture change contacts and components over time, and voltage spikes can damage individual components.

How can you tell that the 89170-0C230 is defective?

A defect shows up as the airbag warning light in the instrument cluster, which lights up permanently or intermittently, as a fault message in the instrument cluster, as a diagnostic tool without connection to the control unit, and as a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to fire.

The warning light indicates a detected fault. Such a fault is not a minor matter, because it affects the entire restraint system.

If the fault memory cannot be read out, the cause remains open and must be searched for specifically.

Which vehicles is the 89170-0C230 fitted in?

The control unit 89170-0C230 is fitted in these vehicles: Toyota Tundra K20 (2000-2006).

You will find the assignment of the number in this list:

• Toyota Tundra K20 (2000-2006)

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

How does the repair of the 89170-0C230 work?

Have the fault memory read out, attach the log, then disconnect the battery before removing the control unit. Then create a repair order online and send in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 tests the control unit on the test bench, replaces defective components, erases stored crash data and carries out a function test. The unit then goes back to you.

The order is important for safety during removal. 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 89170-0C230 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 by UPS.

Put the printed repair order in the parcel and pack the unit shock-proof.