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Discussion Starter #1 (Edited)
hello

yesterday i parked my 159 at home just like usually without any signs of trouble
today i wanted to drive it and after putting the key in, it started to write to the dashboard that ABS, ASR and VDC is not available. i tried to crank it and then this started to
1. the fuel pump relay is clicking fast
2. the engine check light blicking ultra fast
3. the turbo gauge gone crazy jumping up and down, without the engine being started

so i wen tto the shop to pickupa new battery as i suspected it to be the cause - no help
i tried to change the fuel pump relay - still the same

checkout these videos
https://www.dropbox.com/s/17ok7qmqekrinrx/2016-08-14 10.50.22.mov?dl=0
https://www.dropbox.com/s/q1u6c0gewmbbb08/2016-08-14 11.20.50.mov?dl=0

if i turn on the big lights the clicking stops, perhaps because of lack of energy
i tried to connect to the ECU with Multiecuscan as i do usually without any problems and it fails to connect.
any advice on what might be going on please?
 

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Check. Earths

i checked the cables and cleaned them but no change
Have you taken the battery tray out and disconnected the earths to clean them?
While I was thinking about this have you checked the relay, I had a failure very similar on a different car.
 

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Discussion Starter #7 (Edited)
so i checked all the cables and removed all relays and fuses, swapped the relays and no help

can it be short circuited starter motor or alternator?
 

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Discussion Starter #8
got it sorted today.
i found out that there was no +12V going from the grey fuse and relay box to the ECU, so i created a 12V bypass straight from the battery and the ECU showed up in the Multiecuscan. then tried to fire it up and there she was alive. disabled the bypass and it works like a charm. i suspect one of the relays to be sticked which has been perhaps sorted by starting and stopping the engine. i am gonna replace them. any tips for the new relays ? which brand to buy?
 

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Discussion Starter #10
sorry i never found out. she haven't done it since. doing the bypass is quite easy you just need to check on the ECU which pin is the +12V
anyway i removed swapped and replaced all the relays i could find with no help so i suggest you measure if you have 12v on ecu and to go for the bypass right away. that is also my plan if she does it again :)
 

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Thank you for the Answer. How exactly you do the bypass ? Just connect the ECU with wire to the battery? I swap all the relays today and check the fuse’s noting changes like in your case.
 

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Discussion Starter #12 (Edited)
if i remember correctly i connected the bypass cable to the correct cable going to the socket in the bottom of the fuse/relay box as from there it is a direct connection to the ECU. but check the cables first if you do not have some isolation damage, ground issue etc.

the socket is quite easy to get to below this https://www.dropbox.com/s/yv5x1b2u1hurkbx/2016-08-15 18.37.01.jpg?dl=0
the exact pinout is in the elearn cd, but i think it was pin 1 on the ecu socket so just track it by color on the other side


https://www.dropbox.com/s/qarm2p6vo8rv53s/2016-08-28 09.52.56.jpg?dl=0
try to measure if you get 12v there, if not do the above
 

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Hey, I've got the same issue, and I've tried your fix but can't connect to the ECU at all, made a post but no replies and didn't want to drag up an old post that seems solved. I've posted videos etc in the attached post if you'd be able to look?

thank you if you can help!
 
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