Airbag control unit with part number 89170-24460

What does the airbag control unit 89170-24460 do?

The 89170-24460 is the airbag control unit of the restraint system (SRS) at Lexus. It evaluates the crash sensors and determines in an accident within milliseconds which airbags and seatbelt pretensioners to trigger.

During operation the unit checks the system constantly, and faults appear on the airbag warning light.

After an accident crash data is stored, and then the unit locks itself.

Why does the control unit 89170-24460 fail?

The primary cause is stored crash data, even when no airbag has triggered. A standard diagnostic tool cannot remove it; at Airbag24 the data is erased during the repair.

Further causes are also possible:

• 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 89170-24460 is defective?

A defect is recognised by several signs at once. These signs include:

• Airbag warning light stays on permanently or intermittently
• Fault message in the instrument cluster
• No connection between diagnostic tool and control unit
• Fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

Which vehicles is the 89170-24460 fitted in?

This information applies to Lexus. The 89170-24460 is fitted in these vehicles: Lexus RC ASC10 (2015-2018) and ASC10 Facelift (from 2018).

The vehicles concerned follow here:

• Lexus RC ASC10 (2015-2018)
• Lexus RC ASC10 Facelift (from 2018)

Have the fault memory read out before removal. Only then compare the part number on the label of the unit with this information, so that it is certain that the control unit is defective and not a cable or a plug.

For the same vehicles, we also repair control units with the part numbers 89170-24170, 89170-24300, 89170-24320, 89170-24340, 89170-78010.

How does the repair of the 89170-24460 work?

Processing at Airbag24 usually takes 3–4 working days, counted only for checking, repairing and testing.

Your steps begin with reading out the fault memory, whose log you enclose with the unit. Then disconnect the battery, remove the control unit, create a repair order online and send the unit in well packed.

Airbag24 checks the unit, repairs it, erases the crash data and carries out a function test. The unit then goes back to you. 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 89170-24460 get to Airbag24?

You send the device as a parcel, or you book a UPS collection for an extra charge. Airbag24 sends the repaired unit back by UPS.

Print out the repair order and put it into the parcel. Pack the unit shock-proof.