[PIT21]

hello, if the alternator does not charge and you have already tried to replace the engine ecu the problem may be:
1 relay in position number 1 on the fuse box (p2)
2 relays in position number 2 on the fuse box (p2)
3 relays in position number 13 on the fuse box (p2)
4 defective battery master switch
do a test remove the relay in position 13 on the fuse box start the engine and see if the alternator is ok, let us know the result
the engine ecu is connected with a can-coo network (co-ordinator) and controls the alternator charge
also write the vehicle chassis number, a question, battery master switch is original scania?
see this pdf
sorry for my English

hello i have the same problem with an r500 scania,when i remove the relais 13 my alternator charge