Airbag control unit with part number 89170-52290

What does the airbag control unit 89170-52290 do?

The airbag control unit 89170-52290 coordinates the restraint system (SRS) in Toyota. It processes the measured values from the crash sensors and, in an accident, determines within milliseconds which airbags and seatbelt pretensioners are triggered.

In addition, it constantly checks the system's circuits and shows faults via the airbag warning light. After an accident, it stores crash data and locks itself.

Why does the control unit 89170-52290 fail?

The most common cause with the 89170-52290 is stored crash data from an earlier accident, even if no airbag has deployed.

Such entries remain with a standard diagnostic tool. Airbag24 removes them during the repair.

In addition, ageing electronic components, cold solder joints, and moisture and corrosion at plugs play a role. Voltage spikes, for example from a weak battery or from starting with an external power source, can also cause problems.

How can you tell that the 89170-52290 is defective?

A defect on the 89170-52290 is recognised by an airbag warning light in the instrument cluster that stays on permanently or intermittently, by fault messages, by a missing connection of the diagnostic tool, or by a fault memory that cannot be cleared.

• Airbag warning light stays on permanently or intermittently
• Fault messages in the instrument cluster
• Diagnostic tool receives no connection to the control unit
• Fault memory cannot be cleared

In an emergency, the airbags and seatbelt pretensioners may fail to deploy. Have the system checked promptly, because the warning light reports the fault directly.

Which vehicles is the 89170-52290 fitted in?

The 89170-52290 is fitted in these vehicles: Toyota Echo XP10 (1999-2002) and XP10 Facelift (2002-2005).

The vehicles stored for this part number are shown in this list:

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

Compare the part number on the label of the removed unit with this page, so that you can be sure it is the correct unit. Also have the fault memory read out beforehand, because only that shows whether the control unit is defective or 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 89170-52290 work?

You read out the fault memory first, disconnect the battery, remove the 89170-52290 and send the unit in with the repair order. Airbag24 needs 3–4 working days for testing, repairing and the function test.

Enclose the log with the unit. At Airbag24, the unit is checked on the test bench, defective components are replaced, the crash data is erased and a function test is carried out.

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 89170-52290 get to Airbag24?

You send the control unit 89170-52290 to Airbag24 as a parcel or book a UPS collection for an extra charge. After the repair, UPS brings the unit back to you.

Pack the printed repair order into the parcel and cushion the unit so that it is packed shock-resistant.