Circuit/System Description

The accessory wake up serial data 2 circuit is energized by the K114B Hybrid/EV Powertrain Control Module 2 to immediately activate the T18 Battery Charger connected to this circuit when the K9 Body Control Module signals the K114B Hybrid/EV Powertrain Control Module 2 that serial data is required. The T18 Battery Charger monitors the accessory wake up serial data 2 circuit along with the propulsion system active status serial data message. The propulsion system active status message should not be active when the accessory wake up serial data 2 circuit is not high. This DTC is set when the accessory wake up serial data 2 circuit is not high when the propulsion system active signal status is active.