Alternaor LIN bus fault

[sprinterdave]

Can anyone advise?
I have a sprinter 906 that has an intermittent dash warning light (red battery symbol).
Diagnosis with an iCarsoft MBII gives fault code: G2/7 (Alternator with LIN bus) - Communication fault. (see photo).
Does anyone know: a) if I replace the alternator, will it clear the problem? b) is this just a communications problem and is the alternator still charging?

Thanks for any advice

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[classiccarzone]

Lin Bus is the mode of communication and I would imagine that it is a regulator problem. Let your icarsoft on while driving and monitor the voltage to see if it is being regulated.

 

[sprinterdave]

Thank you for your reply.
I have changed the alternator regulator and all seems well now.

NB. The regulator was changed previously (about a year ago) but with an after-market part.
I have fitted a genuine Bosch one this time.

 

[classiccarzone]

Glad that you got that sorted without too much drama.

 

[mersum1es]

Good you got it solved. Usually if Bus controlled alternator looses bus connection, it goes 'emergency mode' where it charge constant 14,3V.

 

[classiccarzone]

Loads of articles on Lin Bus -Local Interconnect Network- on the net for reference