Airbag control unit with part number YWJ101590

What does the airbag control unit YWJ101590 do?

The airbag control unit YWJ101590 is the central control of the restraint system (SRS) of MG. It evaluates the signals from the crash sensors, decides on airbags and seatbelt pretensioners in an emergency, and monitors all components continuously.

After an accident, it stores crash data and locks itself. It reports faults in the system via the airbag warning light in the instrument cluster.

Why does the control unit YWJ101590 fail?

The most common cause is crash data from an earlier accident, even if no airbag has deployed. A standard diagnostic tool cannot remove this data, but Airbag24 erases it during the repair. Other causes include ageing components, moisture at plug connections, cold solder joints and voltage spikes.

Ageing electronics and cold solder joints do not make themselves noticed at first and often only show up during a test. Voltage spikes arise, for example, from a weak battery or from a jump start.

How can you tell that the YWJ101590 is defective?

A defect shows up as an airbag warning light that stays on permanently or intermittently, as an error message in the instrument cluster, as a failed connection to the diagnostic tool and as a fault memory that cannot be cleared. If these signs appear, the YWJ101590 must be examined.

The warning light is the clearest hint the vehicle gives. In an emergency, the airbags and seatbelt pretensioners may not trigger, so a prompt check is worthwhile.

Which vehicles is the YWJ101590 fitted in?

Before removal, check whether your model is in the list. The control unit YWJ101590 is fitted in these vehicles: MG ZT RJ (2001-2005).

The list shows the vehicles recorded for this part number.

• MG ZT RJ (2001-2005)

Compare the part number on the label of the removed unit with this page. That only confirms the right unit. Read out the fault memory beforehand, because only it shows whether the control unit or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers YWC107090, YWJ000220.

How does the repair of the YWJ101590 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only then remove the YWJ101590. Next, create a repair order online and send the unit in well packed. Processing at Airbag24 usually takes 3–4 working days.

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 YWJ101590 get to Airbag24?

You send the YWJ101590 as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 returns the unit by UPS.

The repair order belongs printed in the parcel, and you pack the unit shockproof.