Airbag control unit with part number 89170-02J80

What does the airbag control unit 89170-02J80 do?

The airbag control unit 89170-02J80 brings together all triggering decisions within the restraint system (SRS) of Toyota. It reads the crash sensors, determines in a crash which airbags and seatbelt pretensioners respond, and keeps the system under continuous watch. If it detects a fault, it reports this via the airbag warning light.

After an accident, it stores crash data and locks itself.

Monitoring runs in the background throughout the entire journey, even when no warning light is lit.

Why does the control unit 89170-02J80 fail?

The most common cause of the 89170-02J80 lies in stored crash data, even if no airbag has deployed, and a standard diagnostic tool cannot erase them. Aged components, cold solder joints, moisture at the plugs and voltage spikes are also possible causes.

Crash data are therefore the point that a diagnosis clarifies first.

The following further causes are possible:

• components that age over the years
• cold solder joints in the unit
• moisture and corrosion on plugs
• voltage spikes, for example when starting

How can you tell that the 89170-02J80 is defective?

A defect on the 89170-02J80 shows itself through the airbag warning light in the instrument cluster, which stays on permanently or intermittently. In addition there are a fault message in the instrument cluster, a diagnostic tool without connection to the control unit and a fault memory that cannot be cleared. In such a case, airbags and seatbelt pretensioners may not trigger in an emergency.

The warning light is the clearest indication, because it reports the defect itself without waiting for a check.

If it stays on, have the system checked promptly.

Which vehicles is the 89170-02J80 fitted in?

The information applies to the unit with part number 89170-02J80. For Toyota it is fitted in these vehicles: Toyota Corolla E170 (2013-2018); Toyota Auris E180 (2012-2015) and E180 Facelift (2015-2019).

A list of the vehicles follows here:

• Toyota Corolla E170 (2013-2018)
• Toyota Auris E180 (2012-2015)
• Toyota Auris E180 Facelift (2015-2019)

The comparison of the part number on the label shows that the removed unit matches this page. Whether the control unit is defective or a connector or cable is the cause is shown only by the fault memory. Therefore have it read out before removal.

For the same vehicles, we also repair control units with the part numbers 222814-101, 89170-02C60, 89170-02C70, 89170-02C80, 89170-02C90, 89170-02J70.

How does the repair of the 89170-02J80 work?

You have the fault memory read out and attach the log. Then disconnect the battery, remove the control unit 89170-02J80 and create a repair order online. Afterwards pack the unit well and send it 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.

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 89170-02J80 get to Airbag24?

Either you send the control unit 89170-02J80 as a parcel, or you book a UPS collection for an extra charge. The return journey after the repair is handled by UPS. The printed repair order belongs in the parcel, and the unit must be packed shock-resistant.

Make sure you use a stable parcel with padding, so the control unit survives transport intact.