Circuit/System Description

The wake up signal circuit is energized by the hybrid powertrain control module 2 to immediately activate the battery charger connected to this circuit when the body control module (BCM) signals the hybrid powertrain control module 2 that serial data is required. The battery charger monitors the wake up circuit along with the propulsion system active status serial data message. The propulsion system active status message should not be active when the wake up circuit is not high. This DTC is set when the wake up circuit is not high when the propulsion system active signal status is active.