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Mk3 focus 1.6 tdci charge problem

slimsimmons1984
slimsimmons1984
in Ford Focus Club

Featured Replies

Battery light come on, then battery died

Rac told me to replace alternator 

Battery conditioned and charged with 240v charger

New alternator fitted, battery light still illuminated 

Single wire alternator plug unplugged and alternator reverts to non smart charging.

u1007 Lost Communication with Battery Monitoring Sensor fault code present and similair code for active grill

Wire at alternator only showing 3v untill grill wiring is unplugged, then rises to 9v however still shows fault when alternator plugged back in

3 wire grill plug not showing any voltage

Fuses are all good, power to the battery sensor plug on negative terminal

Any help would beappreciated

Is there a way of testing the battery sensor on the negative terminal? 

Hopefully havent got a fried pcm

 

 

 

  • Quote


    39 minutes ago, slimsimmons1984 said:

    Battery conditioned and charged with 240v charger

    If the battery was drained because of the alternator failure then it is extremely unlikely to ever fully recover. Once discharged below 8V the battery under goes changes that can not be reversed and so it normally has to be replaced.

    Has the BMS been reset after the alternator was replaced ? Usually it should only be reset after a new battery is fitted, but due the battery being fully discharged the BMS might be better reset.

    Is the replacement alternator a new unit or is it reconditioned ?

  • Quote
    • Author

    Battery hasnt been replaced,

    Ill try a reset today and see what happens, any idea where in forscan it will be?

    Alternator is new

     

     

  • Quote

    No need to use FORScan to reset the BMS. It will probably be method 1 for your car.

    On 3/29/2023 at 8:13 PM, unofix said:

    How to reset the BMS method 1

     

     

  • Quote

    Or there is method 2

    On 3/29/2023 at 8:14 PM, unofix said:

    How to reset the BMS method 2

     

     

  • Quote
    • 10 months later...
    • Author

    just to update, i think i have a wiring fault somewhere, having issues where battery light comes on, when loom is jiggled light will stay off for a while, some days no issue at all

  • Quote

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