Airbag control unit with part number 38910-79P20

What does the airbag control unit 38910-79P20 do?

The airbag control unit 38910-79P20 is the central control unit of the restraint system (SRS) for Suzuki. It evaluates the signals from the crash sensors, decides within milliseconds in an accident on airbags and seatbelt pretensioners, and monitors the system continuously. After an accident, it stores crash data and locks itself.

The control unit monitors all components of the restraint system in the background. Each detected deviation is stored in the fault memory, so that the finding remains traceable later.

Faults are displayed by the airbag warning light in the instrument cluster. Anyone who takes this display seriously does not prevent the defect itself, but recognises it early enough to have the system checked.

Why does the control unit 38910-79P20 fail?

Stored crash data is the most common cause, even if no airbag was triggered in the accident; an ordinary diagnostic tool cannot erase it. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

The unit creates crash data as soon as it registers an accident. Airbag24 erases it during the repair, so the control unit comes back with a clean memory.

The other causes relate to age and environment. Electronic components lose reliability over time, and moisture attacks the contacts, which causes corrosion.

Voltage spikes occur, for example, with a weak battery or when starting with a jump start, and can stress the electronics.

How can you tell that the 38910-79P20 is defective?

A defect shows itself through an airbag warning light in the instrument cluster that lights up permanently or intermittently, through an error message on the display, through a lack of connection to the diagnostic tool, or through a fault memory that cannot be erased. In these cases, airbags and seatbelt pretensioners may possibly not deploy in an emergency.

The warning light is the clearest sign, because it displays every fault that the control unit detects. Have the system checked promptly when it lights up.

A diagnostic tool that cannot make contact with the control unit also points to the electronics. However, the cause may equally lie in the plug or the cable, so the finding is only clarified by reading out the fault memory.

Which vehicles is the 38910-79P20 fitted in?

The control unit 38910-79P20 is fitted in these vehicles: Suzuki Ciaz YL.

The overview below shows the vehicles that are recorded for this part number.

• Suzuki Ciaz YL

Compare the part number on the label of the removed unit with this page, and you will know that you have the correct unit. Also have the fault memory read out beforehand, because this result shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers W2T91481.

How does the repair of the 38910-79P20 work?

First read out the fault memory and enclose the log, then disconnect the battery and only then remove the control unit. Then create a repair order online and send in the well-packed unit.

Airbag24 tests the unit on the test bench, replaces defective components, erases the stored crash data and carries out a function test. After that, your own unit goes back to you. Processing at Airbag24 usually takes 3–4 working days, and this time covers testing, repairing and checking only.

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 38910-79P20 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS. Put the printed repair order into the parcel and pack the unit shockproof.

A stable packaging with sufficient filling material protects the control unit in transit. The repair order belongs in the consignment in any case.