Faulty Battery Charger
Battery Charger harness is open or shorted
Battery Charger circuit poor electrical connection
Engine Light ON (or Service Engine Soon Warning Light)
The battery charger will diagnose its own systems and determine when a fault condition is present. Diagnostics and system status is communicated from the battery charger to the hybrid/EV powertrain control module 2 through serial data. The hybrid/EV powertrain control module 2 is the host controller for DTC information.