Circuit/System Description

WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

Devices connected to the powertrain high speed GMLAN serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices. The devices have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver device as an availability indication of the transmitter device. Each message contains the identification number of the transmitter device.

The K114A Hybrid/EV Powertrain Control Module 1 is internal to the T6 Power Inverter Module. Communication diagnostics for the serial data, including device power and ground as well as the wakeup circuits for the K114A Hybrid/EV Powertrain Control Module 1 is diagnosed from external sources only to the T6 Power Inverter Module connector because any circuit fault condition within the T6 Power Inverter Module will cause a complete replacement.