Airbag control unit with part number 38910-64R20

What does the airbag control unit 38910-64R20 do?

The airbag control unit 38910-64R20 controls the restraint system (SRS) in Suzuki. It reads the signals from the crash sensors, determines in a crash within fractions of a second which airbags and seatbelt pretensioners are triggered, and monitors the system permanently. It shows detected faults via the airbag warning light.

The unit is active throughout the entire journey, even when there is no reason to intervene. During this time it continuously checks the connections to the sensors, the seatbelt pretensioners and the airbags.

After an accident it stores crash data and locks itself. The lock is only lifted by the repair.

Why does the control unit 38910-64R20 fail?

The most common cause is crash data stored from an accident, even if no airbag has deployed; a normal diagnostic tool cannot erase it. In addition there are aged components, cold solder joints, moisture and corrosion at plugs, and voltage spikes.

After an accident the control unit creates crash data. This happens even if no airbag has been triggered, and a normal diagnostic tool cannot remove these entries.

Apart from this, the electronics suffer over the years. Solder joints on the circuit board can lose contact, and moisture or corrosion at the plug connections distorts the signals.

Voltage spikes in the vehicle electrics, for example with a weak battery or a jump start, also stress the components.

How can you tell that the 38910-64R20 is defective?

Typical signs are an airbag warning light that stays on permanently or intermittently, an error message in the instrument cluster, a diagnostic tool without connection to the control unit, and a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

The warning light in the instrument cluster is the first signal you will notice:

• Warning light stays on permanently
• Warning light stays on only intermittently
• Error message in the instrument cluster
• Diagnostic tool cannot establish a connection
• Fault memory cannot be cleared

If you notice any of these signs, have the system checked promptly.

Which vehicles is the 38910-64R20 fitted in?

The airbag control unit 38910-64R20 is fitted in these vehicles: Suzuki S-Cross JY.

The following vehicles are equipped with this control unit:

• Suzuki S-Cross JY

Compare the part number on the label of the removed unit with this page; this only establishes that it is the right unit. Whether the control unit is defective or a plug or cable is the cause is only shown by reading out the fault memory, which you should have done beforehand.

For the same vehicles, we also repair control units with the part numbers 38910-61M01, 38910-64R00, 5WK44377.

How does the repair of the 38910-64R20 work?

Have the fault memory read out and attach the log. Then disconnect the battery and remove the control unit. Afterwards create a repair order online and send in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 first checks the control unit on the test bench. Defective components are repaired, after which Airbag24 erases the stored crash data and carries out a function test.

The order is important for your safety: the control unit may only be removed after the battery has been disconnected.

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 38910-64R20 get to Airbag24?

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

The printed repair order goes into the parcel, and the unit must be packed shock-proof.