Airbag control unit with part number 89170-02J00

What does the airbag control unit 89170-02J00 do?

The airbag control unit 89170-02J00 is the central control unit of the restraint system (SRS) for Toyota. It analyses the signals from the crash sensors, decides within milliseconds in an accident which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. It shows any faults found via the airbag warning light.

The unit constantly receives the sensors' measured values and checks the connections to the trigger units. This keeps the system ready for use in an emergency.

After an accident the control unit stores crash data and locks itself.

Why does the control unit 89170-02J00 fail?

Stored crash data is the most common cause, even if no airbag has triggered in the incident. Other causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data cannot be erased with a normal diagnostic tool, so the fault persists. Airbag24 erases the crash data during repair of the unit.

Ageing electronic components lose reliability over time, and cold solder joints can come loose. Moisture and corrosion affect the contacts in plug connections.

Voltage spikes arise, for example, from a weak battery or after jump-starting.

How can you tell that the 89170-02J00 is defective?

The airbag warning light stays on constantly or intermittently, an error message appears in the instrument cluster, the diagnostic tool cannot connect to the control unit, and the fault memory cannot be cleared. Airbags and seatbelt pretensioners may then fail to trigger in an emergency.

The warning light is the clearest indication the vehicle gives. If it stays on, have the system checked promptly.

Only evaluating the fault memory shows whether the control unit itself is affected or only a cable.

Which vehicles is the 89170-02J00 fitted in?

The control unit 89170-02J00 is fitted in these vehicles: Toyota Corolla E170 (2013-2018). Comparing the part number shows whether this is the correct unit.

The following list names the vehicles recorded for this part number.

• Toyota Corolla E170 (2013-2018)

Compare the part number on the removed unit with this page. Also have the fault memory read before removal, because only this result 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 89170-02C60, 89170-02C70, 89170-02C80, 89170-02C90, 89170-12280, 89170-12340.

How does the repair of the 89170-02J00 work?

Have the fault memory of the 89170-02J00 read first and enclose the log. Then disconnect the battery, remove the control unit and create a repair order online. Processing at Airbag24 usually takes 3–4 working days.

The order of these steps is fixed. The unit is only removed after the battery has been disconnected.

Airbag24 tests the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. Then 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 89170-02J00 get to Airbag24?

You send the control unit 89170-02J00 as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 sends it back by UPS.

Place the printed repair order in the parcel and pack the unit shockproof.