Airbag control unit with part number 89170-52590

What does the airbag control unit 89170-52590 do?

The airbag control unit 89170-52590 is the central control unit of the restraint system for Toyota. It evaluates the signals from the crash sensors and decides in an accident, within milliseconds, which airbags and seatbelt pretensioners are triggered.

In normal operation the unit checks the system continuously. It shows faults via the airbag warning light.

After an accident it stores crash data and locks itself.

Why does the control unit 89170-52590 fail?

Crash data stored after an accident is the most common cause on the 89170-52590, even if no airbag has deployed. Aged components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes can also cause a failure.

An ordinary diagnostic tool cannot erase the crash data. Airbag24 removes it only during the repair.

Voltage spikes arise, for example, from a weak battery or a jump-start. Moisture and corrosion attack the plug connectors, while aged components and cold solder joints lie deeper inside the unit.

How can you tell that the 89170-52590 is defective?

On the 89170-52590, a defect shows up as an airbag warning light that lights up permanently or intermittently, and as a fault message in the instrument cluster. A diagnostic tool without connection to the control unit or a fault memory that cannot be cleared also indicates one.

You will notice the warning light in the instrument cluster without difficulty as soon as the system detects a fault.

As long as the fault exists, airbags and seatbelt pretensioners may not deploy in an emergency. Therefore have the finding checked promptly.

Which vehicles is the 89170-52590 fitted in?

The assignment applies to Toyota. The control unit 89170-52590 is fitted in these vehicles: Toyota Echo XP10 (1999-2002) and XP10 Facelift (2002-2005).

These vehicles are stored for this part number:

• Toyota Echo XP10 (1999-2002)
• Toyota Echo XP10 Facelift (2002-2005)

Comparing the part number on the label of the removed unit only ensures that you have the correct unit in front of you. Have the fault memory read out beforehand, because it alone shows whether the control unit is faulty or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-52050, 89170-52310-93C56.

How does the repair of the 89170-52590 work?

For the 89170-52590, have the fault memory read out first and enclose the log. Then disconnect the battery before the control unit is removed. Create the repair order online and send the well-packed unit in. Processing at Airbag24 normally takes 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components, erases stored crash data and carries out a function test. Afterwards your own unit is sent back.

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 89170-52590 get to Airbag24?

Send the control unit 89170-52590 as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

Put the printed repair order into the parcel and pack the unit shock-resistant.