Principles of Operation: Notes

Vehicle communication utilizes a high speed controller area network (HS-CAN), International Standards Organization (ISO) 9141 network, standard corporate protocol (SCP) network and universal asynchronous receiver/transmitter (UART) based protocol (UBP) network. Information is sent to and from individual control modules that each control specific functions. All 4 networks are connected to the data link connector (DLC). The DLC can be found under the instrument panel between the steering column and the audio unit.

The 4 module communication networks are:

• ISO 9141
• High speed (HS) CAN
• Standard corporate protocol (SCP)
• UART-based protocol (UBP)