Airbag control unit with part number 89170-52340

What does the airbag control unit 89170-52340 do?

The airbag control unit 89170-52340 takes over the control of the restraint system (SRS) in Toyota. It evaluates the crash sensors, determines in a fraction of a second in an accident which airbags and seatbelt pretensioners fire, and monitors the system continuously. After an accident, it stores crash data and locks itself.

In normal operation, the electronics are on standby and continuously monitor their surroundings. If they detect a deviation, they store it in the fault memory and switch on the warning light.

Why does the control unit 89170-52340 fail?

The most common cause is crash data from an accident, even if no airbag was triggered. A normal diagnostic tool cannot erase this data. Other causes of failure on 89170-52340 are ageing, soldering points, moisture and voltage spikes.

• Ageing electronic components
• Cold solder joints
• Moisture and corrosion on the plugs
• Voltage spikes, for example from a weak battery

A crash data entry does not mean that the unit is broken. Whether any of the other causes applies is only shown by the examination.

How can you tell that the 89170-52340 is defective?

A defect shows up as the airbag warning light staying on permanently or intermittently, an error message in the instrument cluster, a diagnostic tool that finds no connection, or a fault memory that cannot be cleared. In an emergency, the airbags and seatbelt pretensioners may then not trigger.

The warning light is the central warning signal of the system. As soon as it shows that something is wrong, it is worth looking into the fault memory before taking further steps.

If the connection cannot be established, the cause does not necessarily lie in the control unit itself. Plugs, cables and the power supply are also possible reasons.

Which vehicles is the 89170-52340 fitted in?

The airbag control unit 89170-52340 is fitted in these vehicles: Toyota Yaris Verso XP20 (1999-2005).

The list contains the vehicles for which this part number is recorded.

• Toyota Yaris Verso XP20 (1999-2005)

Comparing the part number on the housing of the removed unit with this page shows whether you are holding the right unit. It does not reveal the cause. Therefore, have the fault memory read out beforehand, because only the result shows whether the control unit is defective or whether a plug or cable causes the fault.

For the same vehicles, we also repair control units with the part numbers 89170-52040, 89170-52070, 89170-52350.

How does the repair of the 89170-52340 work?

First, you have the fault memory read out and attach the log to the order. Then disconnect the battery before you remove the control unit 89170-52340. Afterwards, you create a repair order online and send the properly packed unit in.

At Airbag24, the control unit is checked on the test bench. Defective components are repaired or replaced, the crash data is erased and a function test is carried out. Airbag24 needs 3–4 working days for this work as a rule. Afterwards, you receive your own unit 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 89170-52340 get to Airbag24?

Whether you send the unit 89170-52340 yourself as a parcel or book a UPS collection for an extra charge is up to you. After the repair, Airbag24 returns it by UPS.

You put the printed repair order into the parcel. The control unit is packed shock-proof, so nothing happens to it on the way.