Can Data Link Circuit - Test - Perkins 1106C Troubleshooting Manual

KENR6933
•
Not OK – At least one intermittent fault was
indicated.
Repair: Repair the harness or the connector.
Use the electronic service tool in order to clear all
logged diagnostic codes and then verify that the
repair eliminates the fault.
STOP.

CAN Data Link Circuit - Test

System Operation Description:
Use this procedure under the following
circumstances:
Use this procedure if another procedure has directed
you here. Use this procedure if any of the following
diagnostic codes are active:
•
0247-09 SAE J1939 Data Link abnormal update
rate
•
0247-12 SAE J1939 Data Link failure
The following background information is related
to this procedure:
The CAN Data Link is also known as J1939 Data Link.
The data link is an industry standard for sending data
between different devices in the same application.
High speed data is transfered via the data link.
The data link cannot be accurately tested without
complicated equipment. The data link requires a
resistance of 60 Ohms between the two wires to
correctly transmit the data. This resistance is made
up of two 120 Ohm resistors. The two resistors are
known as "Terminating Resistors". The terminating
resistors should be at opposite ends of a data link
network. If this resistance is not present, then the
data will be intermittent or completely unreadable.
Note: The wiring for the J1939 data link is a shielded
twisted pair cable. If the wiring is damaged the
replacement type must be shielded twisted pair cable.
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Troubleshooting Section