Ecm Will Not Accept Factory Passwords; Ecm Will Not Communicate With Other Systems Or Display Modules; Electronic Service Tool Will Not Communicate With Ecm - Perkins NJ Series Troubleshooting Manual

52
Troubleshooting Section
Cylinder Head Gasket
Switch off the engine and allow the engine to cool
to below normal working temperature. Remove
the pressure cap for the coolant system. Start the
engine and inspect the coolant for the presence
of bubbles. If bubbles are present in the coolant,
combustion gases may be entering the cooling
system. Check the cylinder head gasket. Refer to the
recommended action for the cylinder head gasket
within Troubleshooting, "Coolant in Engine Oil".
Check the cylinder head for flatness. Refer to the
recommended action for checking flatness of the
cylinder head within Systems Operations, "Cylinder
Head - Inspect". Fit the pressure cap if there are no
bubbles in the coolant.
ECM Will Not Accept Factory
Passwords
Probable Causes
One of the following items may not be recorded
correctly on the electronic service tool:
• Passwords
•
Serial numbers
• Total tattletale
• Reason code
Recommended Actions
1. Verify that the correct passwords were entered.
Check every character in each password. Remove
the electrical power from the engine for 30
seconds and then retry.
2. Verify that the electronic service tool is on the
"Factory Password" screen.
3. Use the electronic service tool to verify that the
following information has been entered correctly:
•
Engine serial number
• Serial number for the electronic control module
• Serial number for the electronic service tool
•
Total tattletale
• Reason code
ECM Will Not Communicate
with Other Systems or Display
Modules
Probable Causes
•
Electrical connectors
• Electronic Control Module (ECM)
Recommended Actions
1. Connect the electronic service tool to the
i02413819
service tool connector. If the ECM does not
communicate with the electronic service tool, refer
to Troubleshooting, "Electronic Service Tool Will
Not Communicate with ECM".
2. Ensure that the following items are
correctly installed and undamaged. Refer
to Troubleshooting, "Electrical Connectors -
Inspect".
•
P1/J1 and P2/J2 connectors on the ECM
•
Wiring to display modules
• Wiring to other control modules
3. Troubleshoot the Perkins Data Link for possible
problems. Refer to Troubleshooting, "Data Link
Circuit - Test".
Electronic Service Tool Will
Not Communicate with ECM
Probable Causes
• Configuration for the communications adapter
• Electrical connectors
•
Communication adapter and/or cables
• Electrical power supply to the service tool
connector
•
Electronic service tool and related hardware
SENR9982-01
i02413820
i02535551