DTC B1603 which is related with communication error among the SJB(Smart Junction Box) and the other units.
※ Body CAN communication Control Units : BCM(Body Control Module), SJB(Smart Junction Box), SMK(Smart Key Module), AVN(Audio Video Navigation)
Case1: After short between CAN Low Line and High Line, short to ground together.
Case2: After short between CAN Low Line and High Line, short to power together.
※ DTC B1603 is occurred when It is not possible to transmit data by CAN Line in those way of Software and Hardware. But, It is possible to receive data by CAN Line.
BUS OFF status is reported when data transmit error count number is over 255. The purpose is to verify the status of CAN controller and CAN communication line when error is detected.
Each module on the CAN BUS Line may or may not have detected "B1602 CAN Error". When "B1602 CAN Error" is detected, "B1603 CAN BUS OFF" may or may not have been detected.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
CAN Communication Check |
•
BCM, SJB are not Sleep condition 1. CAN High and Low Line short to ground coincident 2. CAN High and Low Line short to battery coincident |
Enable Conditions |
•
BCM, SJB power on | |
Threshold Value |
•
In case, number of error in CAN Controller's data transmission exceed over 255 times, and its internal counting error occurs twice. | |
Diagnostic Time |
•
It immediately sets DTC after fault detects. | |
DTC Erasing Time |
•
DTC can be erased immediately with GDS after fault has been fixed. DTC is erased after performing IG1 ON/OFF 30times with no additional DTC. |
