B1603 reports BUS OFF status 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.
According to operation condition, some of module which are connected to CAN line may not detect B1603. Also, B1602 coincides with B1603 at all times.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
CAN Communication Check | 1. BCM, CLU are not "Sleep" condition (1) CAN High and Low Line short to ground coincident (2) CAN High and Low Line short to battery coincident caution Under "Sleep" condition, CAN High Line is 0V and CAN Low Line is battery voltage. |
Enable Conditions |
•
IG key "ON" | |
Threshold Value |
•
CAN High/Low : 0V or B+ [Short to power] When 12V voltage is detected. [Short to ground] When 0V voltage is detected. | |
Diagnostic Time |
•
Immediately | |
DTC Erasing Time |
•
DTC is erased immediately after trouble fixed |
