Also check fuse s10 in fuse holder.
Audi ecu relay.
This ecu relay also fits the following vehicles type 2 t4 bus t4 etc golf mk 3 and mk 4 vento lt mk 2 audi a4 a6 100 1993 audi 80 and 90 1992 on audi coupe caddy 1996 2003 passat mk2 and mk3 santana polo mk2.
If the relay fails or has any issues it can cause the vehicle to have all sorts of problems and may even render it undriveable.
The relay is 614 the new one i have has got a different number due to the old one having a design fault as mentioned in the other thread.
Check motronic engine control module ecm power supply relay j271.
004160 supply voltage a circuit malfunction.
Usually a problem with the ecm power relay will produce a few symptoms that can alert the driver of a problem that should be serviced.
For the audi a4 b7 8e 8h 2004 2005 2006 2007 2008 2009 model year.
Engine management ecm ecu failure for audi q7 fitted on models between 2006 and 2008 will generally result in non starting problems for the vehicle.
Fuse box in passenger compartment.
Im sure if you call audi and ask for an ecu 614 relay they will know which one you need.
The ecm power relay is the relay responsible for sending power to the ecm.
Http amzn to 1pquqv4 my car tools and supplies guide.
It powers the ecu module located under the cover just to the left of the right strut tower.