Airbag control unit with part number 89170-B1200

What does the airbag control unit 89170-B1200 do?

The airbag control unit 89170-B1200 forms the control centre of the restraint system (SRS) for Daihatsu. Using the crash sensors, it detects an accident and decides within milliseconds which airbags and seatbelt pretensioners are triggered.

In addition, it checks all components continuously and reports faults via the airbag warning light.

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

Why does the control unit 89170-B1200 fail?

The most common cause with the 89170-B1200 is crash data stored after an accident, even if no airbag has triggered. Other causes include ageing components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

You cannot erase crash data with a standard diagnostic tool. Airbag24 takes over the erasure as part of the repair. Further causes at a glance:

• components that age over time
• solder joints that have gone cold
• moisture and corrosion on contacts
• voltage spikes, for example during jump-starting

How can you tell that the 89170-B1200 is defective?

A fault in the 89170-B1200 shows through the airbag warning light, error messages in the instrument cluster, a missing connection to the diagnostic tool, or a fault memory that cannot be cleared.

Watch for these signs:

• Warning light in the instrument cluster on permanently or intermittently
• Error message in the display
• Diagnostic tool does not find the control unit
• Fault memory cannot be emptied

In an emergency, airbags and seatbelt pretensioners may then not trigger. A check is therefore advisable without delay.

Which vehicles is the 89170-B1200 fitted in?

The 89170-B1200 is fitted in these vehicles: Daihatsu Boon M600 (2010-2016); Daihatsu Sirion M600 (from 2011).

The following overview shows the vehicles assigned to this part number:

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

The label on the removed unit can be checked against the part number; this only establishes the identity of the unit.

Having the fault memory read out before removal clarifies whether the control unit itself is affected or whether a plug or a cable is responsible.

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-B1200 work?

The start is the readout of the fault memory with the enclosed log. Then you disconnect the battery; only after that do you remove the 89170-B1200. Online, you create the repair order, then you pack the unit. Processing at Airbag24 normally takes 3–4 working days.

At Airbag24, the unit first goes to the test bench. Damaged components are repaired, crash data is erased, and a function test concludes the work. Afterwards, you receive your own unit back.

The 3–4 working days relate only to the work at Airbag24, not to your steps or the dispatch.

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-B1200 get to Airbag24?

You can send the 89170-B1200 as a parcel, or have it collected by UPS for an extra charge. Airbag24 returns it by UPS after the repair.

Shock-resistant packaging is mandatory for shipping, and the printed repair order goes into the parcel.