Airbag control unit with part number 7700423184

What does the airbag control unit 7700423184 do?

The unit 7700423184 controls the restraint system (SRS) of Renault. It reads out the sensors, determines in a split second which airbags and seatbelt pretensioners fire, and checks the system continuously. Once an accident has occurred, it stores crash data and locks itself.

Faults are reported via the airbag warning light in the instrument cluster. The evaluation happens inside the unit itself, so that no time is lost in an accident.

Why does the control unit 7700423184 fail?

The control unit 7700423184 most often fails because of stored crash data, even without a triggered airbag. A normal diagnostic tool cannot erase this data. Further causes are aged components, cold solder joints, moisture and corrosion as well as voltage spikes.

Crash data is also stored when no airbag fired in the accident. The unit stores it, and the normal diagnostic tool does not remove it.

Further causes at a glance:

• Components in the unit age over the years.
• Solder joints can go cold or break.
• Moisture and corrosion attack plug connections.
• Voltage spikes, for example from a weak battery or jump-starting, stress the electronics.

How can you tell that the 7700423184 is defective?

A defect on the 7700423184 is recognisable by the airbag warning light in the instrument cluster, by an error message there, by a diagnostic tool without connection to the control unit, or by a fault memory that cannot be cleared. The light reports the fault in this way.

• The airbag warning light in the instrument cluster lights permanently or at times.
• An error message appears in the instrument cluster.
• The diagnostic tool does not establish a connection to the control unit.
• The fault memory cannot be cleared.

Airbags and seatbelt pretensioners may then fail to deploy in an emergency. This also applies when the indicator appears only now and then.

Which vehicles is the 7700423184 fitted in?

The control unit 7700423184 is fitted in this vehicle: Renault Mégane I (1995-2003). The information applies to exactly this part number.

The model details in full:

• Renault Mégane I (1995-2003)

Compare the part number on the label of the unit with this page; that only ensures it is the right unit. Have the fault memory read out beforehand anyway, because that shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 600639500, 7700430059, 7700437477B, 8200117651, 8200117651A, 8200117652.

How does the repair of the 7700423184 work?

First have the fault memory read out and enclose the log. Then disconnect the battery, and only then remove the control unit 7700423184. Create the repair order online and send the unit well packed; processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components, clears stored crash data and runs a function test. The unit goes back to you afterwards.

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 7700423184 get to Airbag24?

You send the control unit 7700423184 as a parcel to Airbag24 or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Put the printed repair order into the parcel and pack the unit shock-proof.