Circuit/System Description

The T18B Battery Charger 2 (K57B Battery Charger Control Module 2) is the secondary high voltage charger. The T18B Battery Charger 2 supplements the T18 Battery Charger when sufficient level 2 (AC) electrical current is available.

The T18B Battery Charger 2 (K57B Battery Charger Control Module 2 is controlled with a charger enable signal, and a serial data communication circuit from the K16 Battery Energy Control Module.

The charger enable signal is set to 12V when the K16 Battery Energy Control Module is awake. This allows the T18B Battery Charger 2 (K57B Battery Charger Control Module 2) to operate while driving to allow DC voltage sensor operation.