General Information

Smart Key Unit
B1603 CAN Bus Off - General Information

Component Location





General Description

Each control module such as BCM(Body Control Module), Cluster(CLU:Cluster), SMK(Smartkey Module), SJB(Smart Junction Box), PSM(Power Seat Module) is connected each other with Body CAN*. Each Control Unit(Module) consists of Low and High Line.
* CAN (Controller Area Network) : CAN is serial bus communication type which links not only communication system but also control units each other.






DTC Description

Smartkey Module sets DTC B1603 if smart key module detects short to battery, short to ground in CAN HIGH and CAN low simultaneously.
This DTC means that both CAN HIGH and CAN LOW line are error. Therefore, CAN communication is not available.

DTC Detecting Condition





Diagnostic Circuit Diagram










Signal Waveform & Data