Theory Of Operation
WARNING: This page is about a different car, the 2020 Jeep Renegade. However, it is still accessible from the selected car via links, so may be relevant.
Electronic Control Units require the following four components to properly communicate on a Controller Area Network (CAN) data bus: Power (Battery/Fused B+/Ignition), Ground, CAN bus voltage and correct vehicle configuration.
For additional information on the communication network. Refer to COMMUNICATION, DESCRIPTION AND OPERATION .