Airbag control unit with part number 89170-02400

What does the airbag control unit 89170-02400 do?

The airbag control unit 89170-02400 coordinates the restraint system (SRS) in the vehicle of Toyota. Based on the sensor signals, it decides in an accident within milliseconds which airbags and seatbelt pretensioners are triggered. It signals faults via the airbag warning light.

During operation the control unit checks the components of the system continuously. It recognises deviations and records them.

An accident causes the unit to secure crash data and then lock itself.

Why does the control unit 89170-02400 fail?

Crash data stored after an accident is the most common cause, even if no airbag has been triggered. An ordinary diagnostic tool does not delete it. Added to this are ageing electronic components, cold solder joints, moisture and corrosion on plug connectors, and voltage spikes, for example from a weak battery or jump-starting.

Crash data cannot be removed with an ordinary reader; Airbag24 deletes it during the repair.

The other causes concern the unit itself and its connections. Which of them applies in an individual case only the test shows.

How can you tell that the 89170-02400 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, an error message appears in the instrument cluster, the diagnostic tool gets no connection to the control unit, or the fault memory cannot be cleared. Then airbags and seatbelt pretensioners may not deploy in an emergency.

The warning light makes the defect visible without any further measurement being needed.

So have the fault memory read out as soon as the light comes on.

Which vehicles is the 89170-02400 fitted in?

The airbag control unit 89170-02400 is fitted in these vehicles: Toyota Corolla E120 (2001-2004) and E120 Facelift (2004-2007).

The list of vehicles follows now:

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

Before removing the unit, compare the part number on the label with this page. This only confirms that it is the right unit. Have the fault memory read out beforehand, because only its contents show whether the control unit is defective or whether a plug or cable is the trigger.

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 89170-02400 work?

Read out the fault memory first and enclose the log, then disconnect the battery and only then remove the control unit. Online, create the repair order, and then send the well-packed unit in. Airbag24 checks it on the test bench, repairs defective components, deletes the crash data and carries out a function test; processing usually takes 3–4 working days.

The log is part of the submission so that the finding is documented.

After the repair your own unit is returned 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 89170-02400 get to Airbag24?

You can send the unit in as a parcel or have a UPS collection booked for an extra charge. Airbag24 sends it back to you by UPS after the repair.

Pack the unit shock-proof and enclose the printed repair order.