CAN Communication is a circuit, consists of CAN LOW and CAN HIGH, in order to communicate among control units.
Smart Key module sets DTC B1689 if Smartkey Module have not received CAN signal from PDM for 3 sec.
Item
Detecting Condition
Possible cause
DTC Strategy
Check CAN message status going to PDM
Check PDM installation
Check fuses related to PDM
Check open in CAN High / Low at PDM
Check open in CAN High Low at SMK
Enable Conditions
SMK IGN ON or Engine ON
Threshold value
No can signal message from PDM for 3 sec.
Diagnostic Time
Right after DTC detected