LIN/CAN-controlled, smart-charge and 48V alternators complicate diagnostics. MSG Equipment outlines equipment solutions to the problems workshops face.
In modern cars the alternator is no longer a simple voltage source: it may be controlled via LIN or CAN, run smart-charge algorithms, form part of an energy recovery system or serve as a 48V mild-hybrid starter-generator. MSG Equipment notes that traditional checks with a multimeter and visual inspection are therefore no longer enough.
Key problems and solutions from the article:
- not knowing whether the fault lies in the alternator or the control electronics – MS015A or MS016 testers that emulate ECU control signals,
- hidden faults that only appear under high load – MS005A and MS002A benches that apply maximum load.
Without proper equipment, the article warns, a healthy alternator may be replaced unnecessarily.