Airbag control unit with part number MR913791

What does the airbag control unit MR913791 do?

The airbag control unit MR913791 controls the restraint system (SRS) for Mitsubishi as the central unit. It evaluates the sensor signals and decides in an accident, within milliseconds, which airbags and seatbelt pretensioners are triggered.

The unit monitors the entire system continuously. If it detects a fault, this appears via the airbag warning light in the instrument cluster.

After an accident the control unit stores crash data and locks itself. Controlling the airbags correctly in an emergency requires the electronics to work without faults.

Why does the control unit MR913791 fail?

The most common cause for the MR913791 is stored crash data after an accident, even without an airbag having been triggered. In addition there are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data cannot be deleted with a normal diagnostic tool. At Airbag24 it is deleted as part of the repair.

Electronic components age over time. Solder joints can have gone cold, and moisture with corrosion disturbs the contacts at plug connections.

Voltage spikes, for example from a weak battery or jump-starting, act directly on the electronics.

How can you tell that the MR913791 is defective?

A fault on the MR913791 is indicated by the airbag warning light in the instrument cluster when it lights up permanently or intermittently. Also an error message in the instrument cluster, a missing connection of the diagnostic tool to the control unit, and a fault memory that cannot be cleared.

The warning light signals that there is a fault in the system. In an emergency, airbags and seatbelt pretensioners may then fail to deploy, so a check is worthwhile.

Which vehicles is the MR913791 fitted in?

For Mitsubishi the control unit MR913791 is intended. It is fitted in these vehicles: Mitsubishi Carisma DA2A (1999-2002), DA2A (2002-2004) and DA1A (1995-1999).

The vehicles in detail:

• Mitsubishi Carisma DA2A (1999-2002)
• Mitsubishi Carisma DA2A (2002-2004)
• Mitsubishi Carisma DA1A (1995-1999)

Compare the part number on the label of the removed unit with this page. That only shows you that you have the right unit in front of you. Have the fault memory read out in advance, because only this result shows whether the control unit is defective or whether a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 285001127, 285001235, 285001286, 285001290.

How does the repair of the MR913791 work?

First have the fault memory read out and attach the log. Then disconnect the battery and only then remove the control unit. For checking, repairing and testing at Airbag24, plan on 3–4 working days as a rule.

Then create a repair order online and send the unit in, well packed. Airbag24 checks it on the test bench, repairs defective components, deletes stored crash data and carries out a function test. Then your own unit is returned.

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 MR913791 get to Airbag24?

You send the control unit MR913791 as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 returns it by UPS.

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