Airbag control unit with part number 86250-35340

What does the airbag control unit 86250-35340 do?

The airbag control unit 86250-35340 controls the restraint system (SRS) of SsangYong. It reads the crash sensors, calculates in a fraction of a second during an impact whether airbags and seatbelt pretensioners must fire, and checks the system continuously in the background. It shows detected faults via the airbag warning light.

In everyday use the unit remains unobtrusive, because it does its work without any input from the driver. Self-monitoring runs constantly, so that no delay occurs at the moment of an accident.

After an accident the control unit creates crash data and then locks itself. This lock remains in place until the unit has been repaired.

Why does the control unit 86250-35340 fail?

The most common cause is crash data stored from an earlier accident, even if no airbag was triggered in it. A normal diagnostic tool cannot remove it. Other possible causes include aged electronics, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes, for example from a weak battery or when jump-starting.

The crash data is the reason the unit holds on to the fault state. It does not necessarily indicate a technical damage to the electronics, but rather information the system has stored about the accident.

The other causes develop gradually. A plug contact where moisture or oxidation occurs may at first only cause intermittent trouble and later fail completely. A battery that loads components with voltage spikes works in a similar way, without showing an immediate defect.

How can you tell that the 86250-35340 is defective?

Typical signs are an airbag warning light that stays on permanently or intermittently, an error message on the display, the diagnostic tool being unable to connect to the control unit, and a fault memory that cannot be cleared. Each of these signs points to a fault in the restraint system.

• Airbag warning light stays on permanently or flickers
• Error message in the instrument cluster or display
• Diagnostic tool does not find the control unit
• Fault memory cannot be cleared

As long as such a warning exists, airbags and seatbelt pretensioners may not deploy in an emergency. The fault must therefore be taken seriously and checked promptly, before the vehicle is used further in everyday traffic.

The warning light shows the fault by itself as soon as it occurs. No search for it is needed.

Which vehicles is the 86250-35340 fitted in?

The control unit 86250-35340 is fitted in these vehicles: SsangYong Tivoli X100 (from 2015).

The vehicles assigned to this unit are listed here:

• SsangYong Tivoli X100 (from 2015)

Check the part number on the label of the removed unit against this page. This is how you confirm that you have the right unit in front of you. Also have the fault memory read out before you remove anything. Only the log shows whether the control unit itself is the cause or whether a plug or a cable is the problem.

For the same vehicles, we also repair control units with the part numbers 86250-35110.

How does the repair of the 86250-35340 work?

You first read out the fault memory and enclose the log. Then disconnect the battery before removing the control unit. After that create a repair order online and send in the unit well packed. Airbag24 usually processes it in 3–4 working days.

The order serves safety, because the system must be de-energised during removal. Every step builds on the previous one, which is why removal without a disconnected battery is not intended.

At Airbag24 the unit is checked on the test bench. Defective components are repaired, the stored crash data is removed and a function test is carried out. Only then does Airbag24 send your own unit back. The stated 3–4 working days refer exclusively to this work.

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 86250-35340 get to Airbag24?

You ship the unit as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 brings it back to you by UPS.

Pack the printed repair order into the parcel and wrap the control unit shockproof, so that it is protected in transit.