Siemens VDO DTCO 1381 - Page 254

Service only
13.4 Messages and troubleshooting measures Events and faults
13 - 22
© Siemens VDO Automotive AG Edition 07/2007
TD00.1381.00 132 102
Yr & JOUFSOBMáGBVMU  4000000B78 CAN fault, message of the CAN controller status "Bus off".
Possible causes
• Faults in the bus medium
• Fault in the physical layer
• Protocol error
Measures
– Check the function / configuration of the DTCO 1381,
correct if necessary.
– Check bus medium, use a CAN analysis tool if needed.
– Check the power supply (term. 30, 15, and 31) of the
CAN participants.
– Check the timing behavior of the CAN participants at ter-
minal 15 "on" or "off".
– Check cabling and pin assignment.
– Check whether a terminator is missing.
– Check whether any CAN participants on the bus have a
different baud rate.
–Check bit structure.
Comment
Monitoring of this fault depends on the configuration of the
DTCO 1381:
• Monitoring of this fault can be activated or deactivated
(CANEVCfg).
• The fault can be suppressed for a certain period after
ignition "on" (ErrorManagementInitialisationInhibit).
The DTCO 1381 may not be the cause of the error.
1)
2)
DTCO 1381 display
Picto. AP Error text MC Error code Meaning, cause and measures
1)
These warning messages will be displayed repetitively every hour until the cause is withdrawn.
2)
These warning messages are not saved in the date memory during calibration mode.