CAN Communication is a circuit, consists of CAN LOW and CAN HIGH, in order to communicate among control units.
Control Modules are respectively communicating via CAN line in order to control Body Electrical.
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
Poor Connection
Power Source to smart key module
Short to battery in CAN HIGH LOW or ground simultaneously.
Faulty Smartkey Module
Enable Conditions
IG ON
Threshold value
CAN communication Error for 2 sec.
Failsafe
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