Airbag control unit with part number 89170-B1250

What does the airbag control unit 89170-B1250 do?

The airbag control unit 89170-B1250 takes over control of the restraint system (SRS) of Daihatsu. In an accident it checks the messages from the crash sensors and decides within milliseconds whether to trigger the airbags and seatbelt pretensioners.

In parallel it monitors the function of the entire system. It reports detected faults via the airbag warning light in the instrument cluster.

After an accident it stores crash data and locks itself. The lock is lifted only by the repair.

Why does the control unit 89170-B1250 fail?

The most common cause is crash data stored after an accident, even when no airbag has deployed. Further causes are aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data cannot be removed with an ordinary diagnostic tool. Airbag24 deletes it during the repair.

• Aged components
• Cold solder joints
• Moisture and corrosion at plug connections
• Voltage spikes, for example from a weak battery or a jump start

How can you tell that the 89170-B1250 is defective?

The airbag warning light in the instrument cluster, which stays on permanently or intermittently, is the most important warning sign. Additionally, fault messages appear in the instrument cluster, there is no connection to the diagnostic tool, or the fault memory cannot be cleared. Airbags and seatbelt pretensioners may then fail to deploy in an emergency.

Such a light makes clear that the restraint system has detected a fault. The finding calls for prompt clarification, even if the vehicle seems inconspicuous in everyday use.

Which vehicles is the 89170-B1250 fitted in?

The control unit 89170-B1250 is fitted in these vehicles: Daihatsu Boon M600 (2010-2016); Daihatsu Sirion M600 (from 2011).

The list breaks down the assignment.

• Daihatsu Boon M600 (2010-2016)
• Daihatsu Sirion M600 (from 2011)

Comparing the part number from the label of the removed unit with this page confirms that you have the right unit. Whether the control unit itself is affected is only clarified by the fault-memory log that you obtain before removal. This log also shows whether a plug or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-87410, 89170-B1030, 89170-B2040, 89170-B2060.

How does the repair of the 89170-B1250 work?

First you have the fault memory read out and enclose the log. Then you disconnect the battery and only then remove the control unit. Online you create the repair order and send the unit in well packed. Processing at Airbag24 generally takes 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components, deletes the crash data and carries out a function test.

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-B1250 get to Airbag24?

One option is to send the parcel to Airbag24; the other is a UPS collection, which you book for an extra charge. The return after the repair is made by UPS.

The printed repair order goes into the parcel, and the unit must be packed shock-proof.