Today my dash bulb warning came on showing a fault on the right DRL / sidelight. I have checked and none of the LEDs are illuminating on the right hand side.
A scan with VAG-COM gives the fault below in the Central Electrics.
The car is a 2009 A3 Sportback TDI Quattro Black Edition, so has factory Xenon and LED DRL lamps.02897 - Supply Voltage for LED Module for DRL and Parking Light; Right
010 - Open or Short to Plus
The only results I can find from searching the fault code are from people who are carrying out LED retrofits.
Has anyone experienced this before? I have read that if an LED unit fails the complete headlight unit needs to be replaced, so hoping there is something else to check first! ELSA Current Flow diagram shows an LED control unit inside the headlamp and two wires from the central electrics to this - I didn't want to put a meter across the wires in case they are running CAN rather than simply putting voltage to the LEDs, as not sure if the dimming etc. will be controlled by the central electrics or the LED control unit.