Data Link Circuit - Test - Perkins NJ Series Troubleshooting Manual

SENR9982-01
Test Step 4. Check the other Devices on
the J1939 Data Link
A. Use the appropriate service tools in order to
diagnose other devices on the data link.
Expected Result:
The other devices are working correctly.
Results:
• OK – The other devices are operating correctly.
Restart the diagnostic process. STOP.
• Not OK – The other devices are not working
correctly.
Repair: Use the appropriate service tools in order
to diagnose other devices on the data link.
Use the electronic service tool in order to clear all
logged diagnostic codes and then verify that the
repair eliminates the fault.
STOP.

Data Link Circuit - Test

System Operation Description:
Use this procedure under the following
circumstances:
Use this procedure if the Perkins Electronic Service
Tool (EST) will not communicate with the Electronic
Control Module (ECM) through the Perkins data link.
The following background information is related
to this procedure:
The Perkins data link is the standard data link that is
used by the ECM in order to communicate with the
Perkins EST.
The ECM provides multiple connections for the
Perkins data link. The technician must ensure that
the correct connector is being tested. The connection
that is used is dependent on the application.
If the diagnostic connector is on the engine, the
positive data link signal will be from P2:21 to J23:D.
The negative data link signal will be from P2:20 to
J23:E.
If the diagnostic connector is off the engine, the
positive data link signal will be from P1:23 to pin "D"
of the diagnostic connector. The negative data link
signal will be from P1:24 to pin "E" of the diagnostic
connector.
The following information refers to the pin number.
Ensure that the correct connector is used.
Communication
The Perkins EST may indicate the following error
message:
The version of the ECM is not recognized and the
integrity of the changed parameters and displayed
data is not guaranteed.
This message will indicate that the version of the
software that is in the Perkins EST is not the same
version of the software that is in the ECM. Install the
latest version of the Perkins EST software in order
to rectify the fault.
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Troubleshooting Section