Airbag control unit with part number MR141890

What does the airbag control unit MR141890 do?

The airbag control unit MR141890 is the central control unit of the SRS restraint system in Mitsubishi. It evaluates the signals from the crash sensors, decides within milliseconds in an accident whether the airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After an accident, it stores crash data and locks itself.

The unit works in the background and checks whether the wiring, sensors and firing circuits are in order.

Detected faults are stored in its memory and shown via the airbag warning light.

Why does the control unit MR141890 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed, and a normal diagnostic tool cannot erase it. Other causes include ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data is the entry the unit stores in its memory after an accident. This entry stays there even when the vehicle then drives normally again. Airbag24 removes the crash data during the repair.

The other causes are more gradual. Ageing components and cold solder joints cause intermittent faults, while moisture and corrosion gradually worsen the contact at plug connections.

Voltage spikes arise, for example, from a weak battery or a jump start, and they can stress the electronics.

How can you tell that the MR141890 is defective?

The airbag warning light lights up permanently or intermittently. In addition, the instrument cluster shows a fault message, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

The signs at a glance:

• Airbag warning light in the instrument cluster, permanently or intermittently
• Fault message in the instrument cluster
• No connection between diagnostic tool and control unit
• Fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may not deploy. An early check is therefore the right step.

Which vehicles is the MR141890 fitted in?

The airbag control unit MR141890 is fitted in these vehicles: Mitsubishi Space Runner N10 (1991-1999).

This overview shows the vehicles that Airbag24 links to this part number.

• Mitsubishi Space Runner N10 (1991-1999)

Compare the part number on the label of the removed unit with this page. This only confirms that it is the correct unit.

Have the fault memory read out before you remove anything. Only the result shows whether the control unit itself is faulty or whether a plug or cable is the cause.

How does the repair of the MR141890 work?

First have the fault memory read out and enclose the log with the parcel. Only then disconnect the battery, remove the control unit MR141890 and create the repair order online. Airbag24 needs 3–4 working days in total for checking, repairing and testing.

On your side, preparation and sending come first. The process at Airbag24 follows.

Airbag24 checks the unit on the test bench, replaces defective components, erases the crash data and carries out a function test. The unit then 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 MR141890 get to Airbag24?

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

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