Airbag control unit with part number 89170-0C692

What does the airbag control unit 89170-0C692 do?

The airbag control unit 89170-0C692 is the central control unit of the restraint system in Toyota vehicles. It evaluates the crash sensors, determines within milliseconds in an accident which airbags and seatbelt pretensioners trigger, and monitors the system continuously. After an accident, it stores crash data and locks itself.

It also detects faults and indicates them via the airbag warning light.

The unit makes its decisions independently, because there is no time to wait in an accident.

Why does the control unit 89170-0C692 fail?

The most common cause on the 89170-0C692 is stored crash data, even if no airbag has deployed. Other possible causes include ageing electronic components, cold solder joints, moisture or corrosion at plug connections, and voltage spikes.

Crash data remains in the memory after an accident, and an ordinary diagnostic tool cannot erase it.

Electronics become more susceptible over the years, contacts absorb moisture, and a weak battery or jump-starting can cause voltage spikes.

How can you tell that the 89170-0C692 is defective?

On the 89170-0C692, a defect first shows up as the airbag warning light in the instrument cluster staying on permanently or intermittently. Typical signs are:

• Error message in the instrument cluster
• No connection between diagnostic tool and control unit
• Fault memory cannot be cleared

With such signs, airbags and seatbelt pretensioners may not deploy in an emergency. The vehicle makes the defect visible, so it is worth taking it seriously.

Which vehicles is the 89170-0C692 fitted in?

The 89170-0C692 is fitted in these vehicles: Toyota Tundra K40 (from 2021); Toyota Sequoia K30 (from 2022). Check with the label on the removed unit whether your car is among them.

These models are listed:

• Toyota Tundra K40 (from 2021)
• Toyota Sequoia K30 (from 2022)

Two checks are part of this. Compare the number on the label of the removed unit with this page, so that you are sure you have the right unit. Have the fault memory read out beforehand, so that it is clear whether the control unit is defective or whether a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-34060.

How does the repair of the 89170-0C692 work?

On the 89170-0C692, you first read out the fault memory and enclose the log. Then you disconnect the battery, remove the control unit and create the repair order online. Afterwards, send the unit in well packed.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test.

Checking, repairing and testing usually takes 3–4 working days 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 89170-0C692 get to Airbag24?

You send the control unit 89170-0C692 to Airbag24 as a parcel, or book a UPS collection for an extra charge. After the repair, the unit comes back to you by UPS.

Enclose the printed repair order with the parcel, and pack the control unit shockproof.