Airbag control unit with part number 89170-02250

What does the airbag control unit 89170-02250 do?

The airbag control unit 89170-02250 manages the restraint system (SRS) at Toyota. It processes the signals from the crash sensors, selects the appropriate airbags and seatbelt pretensioners in an accident and triggers them within milliseconds. It also monitors the entire system without interruption.

It reports faults in the system via the airbag warning light in the instrument cluster, so that you notice a malfunction directly.

After an accident, it secures the crash data and locks itself. Only the repair lifts the lock again.

Why does the control unit 89170-02250 fail?

The most common cause is stored crash data, even if no airbag was triggered; a normal diagnostic tool cannot erase it. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes from a weak battery or a jump start.

The crash data remains in the unit until it is specifically removed. The fault memory therefore keeps the entry until the repair clears it.

The other causes arise from ageing and moisture. Moisture corrodes contacts, and cold solder joints can cause contact problems.

How can you tell that the 89170-02250 is defective?

A defect shows up as the airbag warning light, which lights up permanently or intermittently, and as a fault message in the instrument cluster. In addition, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

In this state, the airbags and seatbelt pretensioners may fail to trigger in an emergency. The warning light makes the defect visible.

If the light stays on, have the fault memory read out promptly.

Which vehicles is the 89170-02250 fitted in?

The airbag control unit 89170-02250 is fitted in these vehicles: Toyota Corolla E120 (2001-2004) and E120 Facelift (2004-2007).

These vehicles are assigned to this part number:

• Toyota Corolla E120 (2001-2004)
• Toyota Corolla E120 Facelift (2004-2007)

First, compare the part number on the label of the removed unit with this page; this only confirms that it is the right unit. Have the fault memory read out beforehand, because the 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 89170-02180, 89170-02240, 89170-02390, 89170-02411, 89170-02G60, 89170-12160.

How does the repair of the 89170-02250 work?

You have the fault memory read out and enclose the log. Then you disconnect the battery, remove the control unit, and create a repair order online before sending the unit in.

Airbag24 checks the unit on the test bench, replaces defective components, erases stored crash data and carries out a function test. Processing usually takes 3–4 working days.

Your 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 89170-02250 get to Airbag24?

You send the unit to Airbag24 as a parcel, or you 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 shockproof.