Td5 no crank

Henry.adams said:

Have you changed both fuse boxes ?

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Yes sorry mate forgot to say changed under bonnet one aswell. With no joy put them all back on the other car and stared up straight away. Cheers

TWINNYTD5 said:

Yes sorry mate forgot to say changed under bonnet one aswell. With no joy put them all back on the other car and stared up straight away. Cheers

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Do all the parts you changed have matching part numbers to the ones you removed ? And is the bcu coded to the correct gearbox type?

Henry.adams said:

Do all the parts you changed have matching part numbers to the ones you removed ? And is the bcu coded to the correct gearbox type?

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Hi again and yes both from es premium automatic models. NANOCOM won't connect to the one with the crossed b on the dash cheers

TWINNYTD5 said:

Hi again and yes both from es premium automatic models. NANOCOM won't connect to the one with the crossed b on the dash cheers

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As I learnt There are a few different types of fuse boxes if the codes don’t match it might not work could be the same for the bcu too but I’m not sure on that. If all the codes match then I believe the Instrument cluster is also part of the system that connect the ecu to the bcu so maybe look into that but again I’m not 100% if I’m wrong someone correct me please

So to be clear do you still see the crossed B with the replacement BCU too or what's the problem? it doesnt crank or it cranks but doesnt start or what?

sierrafery said:

So to be clear do you still see the crossed B with the replacement BCU too or what's the problem? it doesnt crank or it cranks but doesnt start or what?

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Hi yes sorry still have the b on dash after replacing bcu and both fuses boxes and trying to let them syn for 5-10 mins. Turn key and no crank what so ever nothing happens at all. Car runs off relay for 3 seconds then cuts out sorry about the confusion cheers Callum

TWINNYTD5 said:

still have the b on dash after replacing bcu and both fuses boxes

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then the serial data bus between the BCU's C0661 - 1 and IDM(C0587 -17) is probably interrupted, you'll have to make a continuity check on that wire , see electrical library, connector views.

sierrafery said:

then the serial data bus between the BCU's C0661 - 1 and IDM(C0587 -17) is probably interrupted, you'll have to make a continuity check on that wire , see electrical library, connector views.

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Ok thanks I will check it tomorrow

sierrafery said:

then the serial data bus between the BCU's C0661 - 1 and IDM(C0587 -17) is probably interrupted, you'll have to make a continuity check on that wire , see electrical library, connector views.

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I gather I need a multimeter to do this mate? Cheers

TWINNYTD5 said:

I gather I need a multimeter to do this mate? Cheers

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yes you do

sierrafery said:

yes you do

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Ok I'll pick one up tomorrow and keep you updated thanks for taking the time to reply.much appreciated