Airbag control unit with part number 38910-54P40

What does the airbag control unit 38910-54P40 do?

The airbag control unit 38910-54P40 is the central control unit of the restraint system (SRS) for Suzuki. It evaluates the readings from the impact sensors and decides in a crash which restraint devices deploy. During operation it monitors the system continuously.

The evaluation takes place in fractions of a second, because airbags and seatbelt pretensioners can only react in time if the decision is made immediately.

The unit shows detected faults via the airbag warning light in the instrument cluster. After an accident it stores crash data and locks itself. The lock is only lifted by the repair.

Why does the control unit 38910-54P40 fail?

The most common cause is crash data that stays stored after an accident, even without a triggered airbag; a usual diagnostic tool cannot delete it. In addition there are aged components, cold solder joints, moisture and corrosion at plugs, and voltage spikes from a weak battery or jump starting. Airbag24 deletes the crash data during the repair.

Crash data are the records around the accident. They remain in the memory of the control unit until they are removed during the repair.

Aged electronics deteriorate over time. Solder joints become brittle, and moisture lets contacts corrode until the transition no longer works cleanly.

How can you tell that the 38910-54P40 is defective?

A defect shows itself through an airbag warning light that stays lit or lights up intermittently, through an error message in the instrument cluster, through a missing connection to the diagnostic tool, or through a fault memory that cannot be cleared.

If the warning light is on, airbags and seatbelt pretensioners may possibly not trigger in an emergency. Therefore have the system checked promptly.

A diagnostic tool that cannot establish a connection is also a warning sign that you need to follow up.

Which vehicles is the 38910-54P40 fitted in?

The control unit 38910-54P40 is fitted in these vehicles: Suzuki Vitara LY and S.

The assigned vehicles are shown in the following overview.

• Suzuki Vitara LY
• Suzuki Vitara S

A comparison of the part number on the label of the removed unit with this page only confirms the identity of the unit. Have the fault memory read out beforehand. Whether the control unit itself is defective or a plug or cable is the cause can only be determined by that.

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 38910-54P40 work?

First have the fault memory read out and the log attached, then disconnect the battery. Only afterwards remove the control unit, create the repair order online and pack the unit well.

At Airbag24 processing usually takes 3–4 working days. During this time the unit is checked, repaired where necessary and then tested.

Airbag24 removes the crash data in the process, and afterwards 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 38910-54P40 get to Airbag24?

You send the unit as a parcel or arrange a UPS collection for an extra charge. After the repair UPS brings the control unit 38910-54P40 back to you.

Pack the unit shock-proof and enclose the printed repair order.