Airbag control unit with part number 89170-52160

What does the airbag control unit 89170-52160 do?

The airbag control unit 89170-52160 belongs to the restraint system of Toyota and controls its airbags and seatbelt pretensioners. In an accident it works out from the crash sensors, within milliseconds, which triggering is needed, and at the same time monitors the entire system. If it reports a fault, the airbag warning light comes on.

The monitoring runs in the background whenever the vehicle is in operation. During this, the unit checks sensors, lines and trigger circuits.

After an accident the unit stores crash data and then locks itself. This also applies if no airbag has triggered.

Why does the control unit 89170-52160 fail?

The most common cause is crash data stored in the unit after an accident, even if no airbag has triggered. Aged components, cold solder joints, moisture or corrosion on plug connections, and voltage spikes, such as from a weak battery or jump-starting, can also come into play.

A normal diagnostic tool cannot remove this data. Airbag24 clears it during the repair. Apart from the crash data, these causes may be relevant:

• aged electronics
• cold solder joints in the unit
• moisture and corrosion on plugs
• voltage spikes, for example from a weak battery or jump-starting

How can you tell that the 89170-52160 is defective?

A defect shows itself through the airbag warning light, when it stays on permanently or intermittently, through a fault message in the instrument cluster, through a diagnostic tool that cannot establish a connection, or through a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

The warning light is the most direct way in which the vehicle tells you about a fault. It appears as soon as the control unit detects the fault and needs your attention.

The warning light alone does not show whether the unit itself is affected. A diagnosis can narrow down the cause.

Which vehicles is the 89170-52160 fitted in?

The 89170-52160 is fitted in these vehicles: Toyota Echo XP10 (1999-2002) and XP10 Facelift (2002-2005). The assignment is limited to the vehicles we have information on so far.

The known vehicles are shown in this overview:

• Toyota Echo XP10 (1999-2002)
• Toyota Echo XP10 Facelift (2002-2005)

Before removal, compare the part number on the label with this page. This confirms that you have the right unit, and this comparison does nothing more. To establish whether the control unit itself is defective, have the fault memory read out beforehand, because a plug or a cable can be the cause just as well.

For the same vehicles, we also repair control units with the part numbers 89170-52050, 89170-52310-93C56.

How does the repair of the 89170-52160 work?

You start by having the fault memory read out, then disconnect the battery and only then remove the control unit. Afterwards you create the repair order online, enclose the protocol and send in the unit. At Airbag24, checking, repairing and testing usually take 3–4 working days.

On the test bench the control unit is examined. Airbag24 replaces defective components, the crash data is erased, and then a function test follows. You receive your own unit back afterwards.

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 89170-52160 get to Airbag24?

You send the unit in 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 goes into the parcel, and you pack the control unit shock-proof.