Airbag control unit with part number 89170-02101

What does the airbag control unit 89170-02101 do?

The airbag control unit 89170-02101 takes over the control of the restraint system (SRS) for Toyota. In a crash it checks the signals from the crash sensors and decides which airbags and seatbelt pretensioners are triggered.

It monitors the system continuously and indicates faults via the airbag warning light.

The control unit records crash data after a crash and locks itself as a result.

Why does the control unit 89170-02101 fail?

A possible trigger in the 89170-02101 is crash data from an accident, which is stored even without an airbag deployment. A normal diagnostic tool cannot erase it.

The control unit creates this data when it detects an accident situation. The fault then occurs during operation, without an airbag having to have been triggered.

Aged electronic components are also a possibility, as are cold solder joints and moisture or corrosion at plug connections. Voltage spikes from a weak battery or a jump start can also stress the electronics.

How can you tell that the 89170-02101 is defective?

The airbag warning light in the instrument cluster lights up constantly or intermittently when the 89170-02101 is defective. Fault messages, a missing connection to the diagnostic tool or a fault memory that cannot be erased are added.

A fault memory that cannot be emptied points more to the control unit than to a cable. If the diagnostic tool stays silent, a precise check is also worthwhile.

Until the fault is rectified, airbags and seatbelt pretensioners may possibly fail to deploy in an emergency.

Which vehicles is the 89170-02101 fitted in?

Check whether your model is on the list. The airbag control unit 89170-02101 is fitted in these vehicles: Toyota Corolla E120 (2001-2004) and E120 Facelift (2004-2007).

The vehicles are listed here:

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

First read out the fault memory. That shows whether the control unit is really defective or whether a plug or a cable is the cause. Then compare the part number on the label of the unit.

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 89170-02101 work?

Before removal, read out the fault memory and enclose the log. Then disconnect the battery, remove the 89170-02101, create the repair order online and send the unit in well packed. Airbag24 needs 3–4 working days as a rule for testing, repairing and checking.

At Airbag24 the unit goes onto the test bench. Defective components are replaced, stored crash data is erased and a function test is carried out.

Your own unit is then sent back. 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 89170-02101 get to Airbag24?

You send the control unit 89170-02101 to Airbag24 as a parcel or additionally book a UPS collection. The return after repair is made by UPS.

Enclose a printed repair order and make sure the parcel is shockproof.