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*¹. Each Control Unit(Module) consists of Low and High Line.
*¹ CAN (Controller Area Network) : CAN is serial bus communication type which links not only communication system but also control units each other.
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.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
CAN signal check | 1. Poor connection 2. Power supply to Smartkey Unit (PIC IMMO Unit) 3. Short to battery or ground in CAN high or low signal toge 4. Smartkey Unit(PIC IMMO Unit) |
Enable Conditions |
•
IG ON or Engine ON | |
Threshold value |
•
CAN high/low : Votlage is "0" means short to ground, Voltage is "B+" means short to battery | |
Diagnostic Time |
•
Right after DTC detected |
