Airbag control unit with part number 89170-34060

What does the airbag control unit 89170-34060 do?

The airbag control unit 89170-34060 is the central control unit of the restraint system (SRS) for Toyota. It evaluates the crash sensor signals, decides in a crash within milliseconds which airbags and seatbelt pretensioners are triggered, and monitors the entire system continuously.

If the unit detects a fault, it shows it via the airbag warning light in the instrument cluster. After a crash it stores crash data and then locks itself.

That is exactly why it pays to take the system's indications seriously, because the control unit manages all deployments.

Why does the control unit 89170-34060 fail?

Stored crash data is the most common cause: it arises after an accident even if no airbag has triggered, and it cannot be erased with a normal diagnostic tool. Aged electronic components, cold solder joints, moisture and corrosion at plug connectors and voltage spikes, for example from a weak battery or jump-starting, are also possible causes.

That the control unit has stored data after an impact without triggering is not a contradiction. During the repair at Airbag24, this crash data is deleted, while the other causes are investigated on the test bench.

Which of these causes is actually present is shown only by the test, not by the part number.

How can you tell that the 89170-34060 is defective?

A defect shows first at the airbag warning light in the instrument cluster, which stays on continuously or intermittently. Fault messages in the instrument cluster and a missing connection from the diagnostic tool to the control unit 89170-34060 are also signs.

• airbag warning light stays on continuously or intermittently
• fault message in the instrument cluster
• diagnostic tool has no connection to the control unit
• fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may then fail to trigger. It is therefore sensible not to ignore the indication, but to have the cause clarified promptly.

Which vehicles is the 89170-34060 fitted in?

The control unit 89170-34060 is fitted in these vehicles: Toyota Tundra K40 (from 2021).

The vehicles are listed here at a glance:

• Toyota Tundra K40 (from 2021)

Before removal, the following steps are worthwhile. Compare the part number on the label of the removed unit with this page; this only ensures that it is the correct unit. Also have the fault memory read out beforehand, since only this 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 89170-0C060, 89170-0C160, 89170-0C190, 89170-0C440, 89170-0C670.

How does the repair of the 89170-34060 work?

For 89170-34060, first have the fault memory read out and enclose the log; then disconnect the battery, and only then remove the control unit. Next create the repair order online and send in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the control unit on the test bench, replaces defective components, deletes the stored crash data and carries out a function test. After that your own unit is sent back to you by UPS.

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 89170-34060 get to Airbag24?

You send the control unit 89170-34060 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends the unit back by UPS.

Place the printed repair order in the parcel and pack the control unit shock-proof, so that it arrives undamaged.