Airbag control unit with part number 38910-86R40

What does the airbag control unit 38910-86R40 do?

In the vehicle of Suzuki, the airbag control unit 38910-86R40 forms the central unit of the restraint system (SRS). It evaluates the crash sensors and decides in an impact, within milliseconds, whether airbags and seatbelt pretensioners are triggered.

During operation, it monitors the system continuously and shows faults via the airbag warning light. After an accident it stores crash data and locks itself; only the repair releases the lock.

Why does the control unit 38910-86R40 fail?

The most common cause is stored crash data from an accident, even if no airbag has deployed. Ageing electronic components, cold solder joints, moisture and corrosion at connectors, and voltage spikes are also possible causes.

Crash data remains stored in the control unit, and a standard diagnostic tool cannot delete it. Airbag24 removes it during the repair.

The other causes act gradually. Electronic components age, solder joints can lose contact, and moisture and corrosion attack the connectors.

Voltage spikes, for example from a weak battery or a jump start, can place additional strain on the unit.

How can you tell that the 38910-86R40 is defective?

The airbag warning light in the instrument cluster, which stays on permanently or intermittently, is the clearest sign. Possibly a fault message, no connection to the diagnostic tool or a fault memory that cannot be cleared will come with it. Then airbags and seatbelt pretensioners may not deploy in an emergency.

In everyday use, a glance at the instrument cluster is enough to see the display. The system sets it itself as soon as it detects a fault.

If a fault cannot be removed despite an attempt to clear it, this points to a problem that still exists.

Which vehicles is the 38910-86R40 fitted in?

The decisive factor is the assignment in the records of Airbag24. The control unit 38910-86R40 is fitted in these vehicles: Suzuki Vitara LY and S.

Below are the vehicles recorded for this control unit.

• Suzuki Vitara LY
• Suzuki Vitara S

You compare the part number on the label with this page to confirm that you have the correct unit; nothing more is established by it. The cause is clarified by the fault memory, which you have read out beforehand, because it shows whether the control unit is defective or whether a connector or cable is responsible.

For the same vehicles, we also repair control units with the part numbers 16244579, 38910-54P00, 3891052D10, 3891065J50, 3891086R00, 3F900-76S00.

How does the repair of the 38910-86R40 work?

You have the fault memory read out and enclose the readout log, then disconnect the battery and only then remove the control unit. Next you create a repair order online and send the unit in, well packed. Processing at Airbag24 usually takes 3–4 working days.

This sequence applies without deviation for safety reasons.

Airbag24 then examines the unit on the test bench, replaces defective components, removes the crash data and carries out a function test. After that, your own unit goes back to you.

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 38910-86R40 get to Airbag24?

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

The printed repair order goes into the parcel, and the unit is packed shockproof.