Computers/Controls - CAN Error Frame Finder Info.
Technical JournalTITLE:
Error Frame Finder
CAR MARKET:
United States
ISSUING DEPARTMENT:
Technical Service
REF NO:
TJ 20402
ISSUE DATE:
YEAR
2012
MONTH
09
DAY
24
PARTNER:
3 US 7510 Volvo Cars North America
FUNC DESC:
Other electrical equipment
FUNC GROUP:
3600
"Fixed Right - First Time"
Attachment
Vehicle Type
CSC Customer Symptom Codes
DTC Diagnostic Trouble Codes
Text
BACKGROUND:
The EFF function can be an aid in fault tracing intermittent CAN network problems by providing a visible indication of error frames that are being transmitted on the network when the fault becomes active. Error frames will be transmitted when there is a critical fault in the network or network wiring
such as open circuits, i.e. terminal/connector problems, broken wiring, short circuits, i.e. chaffed/pinched wiring and defective nodes, i.e. "babbling" nodes.
The advantage of using the EFF function is that error frames are usually transmitted on the network before a vehicle symptom can occur. Hence, if the fault is very intermittent in nature, it may be possible, for example, to induce the wiring fault for a short duration by manipulating the vehicle
harnesses and connectors. The electrical fault will occur and be detected by the EFF without ever having a vehicle symptom appear.
See the attached document for use and setup of DICE error frame finder.
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