Pretty much in despair with this!
Started with battery found flat one morning. Wouldn't take a charge, brand new S5 Bosch battery fitted. Try to start engine, after about 5 second delay engine turns over briskly but no signs of firing. Lots of warning lights.
Since then I've got the BM Technic cable and software and spent ages trying to diagnose it. Problem is, DIS can't communicate with most of the modules which I think is due to them not being powered up. All the fuses in the glove box and engine compartment are OK. I've also tested the relays in the glove box and under bonnet compartment. To summarise symptoms and findings-
Turns over on starter but no firing.
Many unrelated fault lights.
Control modules not communicating.
Terminal 15 wakeup (Acc) no voltage. (See screen print)
Black relay inside white box in engine compartment seems to be energised constantly. Think this is causing a battery drain.
I think the lack of volts on terminal 15 wakeup is the key. Any suggestions gratefully received. Close to giving in and visiting the stealers.
Capture dis 2.jpgCapture dis 3.jpgdis 1.jpgDis 4.jpg