Airbag control unit with part number 38910-65J40

What does the airbag control unit 38910-65J40 do?

The airbag control unit 38910-65J40 is the central controller of the SRS system on Suzuki. It processes the messages from the crash sensors and decides in a fraction of a second in an accident which airbags and seatbelt pretensioners are triggered. It also monitors all connected components and shows faults via the airbag warning light.

If an accident happens, the unit stores crash data and then locks itself. Otherwise it operates unobtrusively in the background.

Why does the control unit 38910-65J40 fail?

Most often the cause is crash data stored after an accident, even if no airbag was deployed. A normal diagnostic tool cannot erase it. Aged components, cold solder joints, moisture and corrosion as well as voltage spikes are also possible causes.

The crash data is held in the unit's memory, and an ordinary diagnostic tool does not remove it.

Electronic components age over time, and solder joints can turn cold. Moisture and corrosion attack plug connectors, while voltage spikes, for example from a weak battery or when starting with external power, stress the electronics.

Which cause applies in an individual case cannot be reliably determined from a distance.

How can you tell that the 38910-65J40 is defective?

The airbag warning light in the instrument cluster lights up continuously or intermittently, and a fault message appears there. The diagnostic tool receives no connection to the control unit, and the fault memory cannot be cleared. Airbags and seatbelt pretensioners may then fail to deploy in an emergency.

The warning light reports the fault itself. You should therefore look into the display promptly.

Which vehicles is the 38910-65J40 fitted in?

Whether your vehicle is affected can be clarified using these details. The 38910-65J40 control unit of Suzuki is fitted in these vehicles: Suzuki Grand Vitara JT.

The vehicles in detail:

• Suzuki Grand Vitara JT

On the one hand, compare the part number on the label of the removed unit with this page, so you see that it is the correct unit. On the other hand, have the fault memory read out beforehand. Only the log shows whether the control unit is defective or whether a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 38910-65J30, 3891065J50, 65J5712911, W2T71973.

How does the repair of the 38910-65J40 work?

First have the fault memory read out and attach the log. Then disconnect the battery and remove the control unit. Only then create the repair order online and send the unit in.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. Your own unit is then returned to you.

Processing at Airbag24 usually takes 3–4 working days, and this time covers only checking, repairing and testing. 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 38910-65J40 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends the unit back to you by UPS.

Enclose the printed repair order in the parcel and pack the airbag control unit shock-resistantly.