Lamborghini Reventón Coupé airbag control unit repair

What is an Lamborghini Reventón Coupé airbag control unit?

The airbag control unit is the central control unit of the restraint system (SRS) in the Lamborghini Reventón Coupé. It evaluates the signals from the crash sensors and, in an accident, decides within milliseconds which airbags and seatbelt pretensioners deploy. It also monitors the entire system continuously and reports faults via the airbag warning light.

The Lamborghini Reventón Coupé belongs to a small production run, so spare parts and specialist knowledge about the vehicle are correspondingly rare. The control unit is fitted in the 2007 to 2008 series. Even in a vehicle like this it works as in any modern car: it compares the sensor readings with stored thresholds and only issues a firing command when an accident is detected.

After an accident the control unit stores crash data and locks itself. The airbag warning light in the instrument cluster then tells you that the system is no longer ready for use.

Why is the Lamborghini Reventón Coupé airbag control unit defective?

The most common cause is crash data stored after an accident, even if no airbag deployed. Other causes are aged electronic components, cold solder joints, moisture and corrosion on connectors, and voltage spikes.

Stored crash data cannot be cleared with an ordinary diagnostic tool. The control unit therefore stays locked even though the vehicle may look fine on the outside. In addition, components on the circuit board age over the years, and solder joints can develop contact problems.

Moisture and corrosion on the connectors disrupt communication within the system. Voltage spikes, for example from a weak battery or a jump start, can put additional stress on the electronics. Typical signs are a permanently lit airbag warning light, a fault memory that cannot be cleared, or a diagnostic tool that cannot connect to the control unit.

Common error codes for Lamborghini Reventón Coupé airbag control unit repair

The error codes show in which area of the airbag system the Lamborghini Reventón Coupé detects a fault, for example in communication, in the control unit itself, in the squib circuits or in stored crash data. They are read out with a diagnostic tool.

First, have the fault memory read out at a workshop with a suitable diagnostic tool. You will receive the codes in plain text, usually together with a short description. After that it is possible to work out what the message means. These codes are common for this vehicle:

• 15 → General fault in the restraint system
• B1139 → Airbag system fault, details via diagnosis
• B1649 → Airbag system fault, details via diagnosis
• B1650 → Airbag system fault, details via diagnosis

A code alone does not prove that the control unit is defective. Connectors, wiring or an airbag module can also be the cause. Only the inspection shows where the fault lies. Ideally, enclose the read-out report with the unit you send in.

What part numbers are available for the Lamborghini Reventón Coupé airbag control unit repair?

The part number is printed on the label of the control unit and determines the exact version. Within a series there are different numbers depending on equipment and year of manufacture.

The following list contains known part numbers for the Lamborghini Reventón Coupé. It makes no claim to completeness:

• 410880201
• 60009467
• 60014300

Compare the number on your unit with this list. This only confirms that it is the right unit. Whether it is defective is shown only by reading out the fault memory or by the inspection at Airbag24.

Here is how to proceed: have the fault memory read out, disconnect the battery and remove the control unit. Then create a repair order online and send the unit in. Processing at Airbag24, covering inspection, repair and testing, usually takes 3–4 working days. 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.