DTC B1990: ESCL Battery Short Circuit To Ground: General Description
The body electrical system is comprised of four ECU applied CAN*1 communication nodes.
* Control Units: BCM (Body Control Module), PDM (Power Distribution Module), CLU (Cluster), SMK (Smart Key) ECU.
The steering wheel lock/unlock state of ESCL and the required data when EMS (Engine Management System) controls starting are sent to PDM by the serial communication line.
*1 CAN (Controller Area Network): CAN is serial bus communication type which links not only communication system but also control units each other.
*2 LIN (Local Interconnect Network): LIN is serial communication type which is used in electrical control system. (This is less expensive.)