The fitment of an LED bulb to replace a standard filament bulb may cause the CANbus system within a vehicle to send a warning signal to the on-board computer to say that the bulb has just been replaced, OSRAM reports.
LED bulbs have a low wattage compared to standard filament bulbs.
An OSRAM spokesperson said: “As an example, a sidelight bulb (BS Ref. 501) would draw about 0.4 Amps, if replaced with an LED bulb, the current draw would drop to below 0.1 Amp and this would probably be seen as a failure.
“Depending on the vehicle manufacturer some use test pulses that are sent to the bulbs that are fitted, even when they are not lit, to check if the filaments are intact; others check the current drawn when the bulbs are switched on.
“Bulbs that do not return the correct status, via the CANbus system, result in a warning light coming up on the dashboard.”
The OSRAM LEDriving CANbus control unit serves as a bypass of the vehicles bulb failure detection system.
Three kit range
There are three kits in the range: 5W, 21W and 50W.
The spokesperson added: “Depending on the type of LED bulb fitted and the fault or error message will depend on the kit you require.
“The 5W and 21W kits are designed for easy installation and are suitable for most vehicle models.”
Each kit contains two controllers, one for each side of the car and the controllers are connected across the wires that go into the bulb holder.
The kit includes two simple snap on connectors per controller to make the electrical connections.
The 50W kit is for use with our aftermarket fit replacement LED DRL and fog kits.
The addition of the kit should resolve the error messages on the dash and will retain the products performance and lifetime.
For further information about OSRAM, select ‘more details’ below.