Table 79
Troubleshooting Test Steps
Values Results
1. Active Codes and Logged Codes
A. Certain diagnostic codes and/or event codes may cause an
engine shutdown. Connect the electronic service tool and check
for active codes and for logged codes.
B. Use the electronic service tool to check for associated diag-
nostic trouble codes. Refer to Table 78
Codes Result: There are associated diagnostic trouble codes active
or logged.
Repair: Troubleshoot any active or logged associated diag-
nostic trouble codes before continuing with this procedure.
Result: There are no associated diagnostic trouble codes ac-
tive or logged.
Proceed to Test Step 2.
2. Electrical Connections
A. Check for the correct installation of the ECM J1/P1 and the
J2/P2 connectors. Check for correct installation of the fuel injec-
tor connectors.
Connectors Result: There are suspect connectors.
Repair: Perform the “Wiggle Test” on the electronic service
tool.
Repair or replace connectors that are suspect.
Result: There are no suspect connectors.
Proceed to Test Step 3.
3. Electrical Connections
A. Check the power and ground connections to the ECM. Refer
to Troubleshooting, “Electrical Power Supply - Test”.
Electrical
Connectors
Result: The electrical connections are OK.
Proceed to Test Step 4.
Result: The electrical connections are not OK.
Repair: Repair or replace the damaged connectors. Verify
that the repair eliminated the fault.
4. Unstable Fuel Supply
A. Inspect the fuel system. Refer to Systems Operation/Testing
and Adjusting, “Fuel System - Inspect” for additional information.
Cold weather adversely affects the characteristics of the fuel.
Refer to the engine Operation and Maintenance Manual, “Cold
Weather Operation” for further information.
B. Check fuel quality. Check the fuel tank for debris or foreign
objects which may block the fuel supply.
Fuel Result: The fuel quality is OK.
Proceed to Test Step 5.
Result: The fuel quality is not OK.
Repair: Replace the fuel. Verify that the repair eliminated the
fault.
5. Switches
A. Check the keyswitch input to the ECM.
B. Check any engine shutdown switches and associated wiring.
Switches Result: The shutdown switches and wiring are OK.
Proceed to Test Step 6.
Result: The shutdown switches and wiring are not OK.
Repair: Make the necessary repairs, Verify that the repair
eliminated the fault.
(continued)
158 UENR4469-36
Symptom Troubleshooting
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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