Airbag control unit with part number 38910-78K10

What does the airbag control unit 38910-78K10 do?

The control unit 38910-78K10 coordinates the restraint system (SRS) of Suzuki. It checks the crash sensors continuously, selects the airbags and seatbelt pretensioners in an accident within milliseconds, and reports faults to the airbag warning light. After an accident it stores crash data and locks itself.

The unit therefore connects the sensors with the triggers. Without a working control unit, the entire restraint system cannot work as intended.

Why does the control unit 38910-78K10 fail?

Stored crash data from an accident is the most common cause on the 38910-78K10, even when no airbag has deployed. A normal diagnostic tool cannot erase this crash data.

Several other causes are also possible, related to ageing, connections and the power supply. Ageing components, cold solder joints, moisture and corrosion on connectors, as well as voltage spikes, for example from a weak battery or jump-starting, belong to them.

Which cause applies in an individual case only becomes clear once the fault memory has been read out.

How can you tell that the 38910-78K10 is defective?

On the 38910-78K10, defects show up as the airbag warning light, which lights up permanently or intermittently in the instrument cluster, and as a fault message in the instrument cluster. A diagnostic tool without connection to the control unit and a fault memory that cannot be cleared are added.

In an emergency, airbags and seatbelt pretensioners may then not deploy. Typical signs are:

• airbag warning light on permanently or intermittently
• message in the instrument cluster with a fault notice
• diagnostic tool makes no contact with the control unit
• fault memory remains after the attempt to clear it

Which vehicles is the 38910-78K10 fitted in?

The 38910-78K10 is the version for Suzuki. It is fitted in these vehicles: Suzuki Grand Vitara JT.

The list of vehicles in which this unit was fitted is here:

• Suzuki Grand Vitara JT

Comparing the part number on the label with this page only confirms that it is the correct unit, nothing more. Have the fault memory read out beforehand: only the result shows whether the control unit itself 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 38910-78K10 work?

First have the fault memory read out and attach the log to the unit. Then disconnect the battery and remove the 38910-78K10. Afterwards create a repair order online and send the unit in. Processing at Airbag24, that is checking, repair and function test, usually takes 3–4 working days.

Processing at Airbag24, checking, repair and function test, usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components, deletes stored crash data and carries out a function test. Afterwards your own unit is returned 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 38910-78K10 get to Airbag24?

You send the 38910-78K10 in as a parcel or book a UPS collection for an extra charge. Airbag24 sends the unit back to you by UPS after the repair.

Put the printed repair order in the parcel and pack the unit shockproof.