Table 177
Troubleshooting Test Steps Value Results
1. Determine the Diagnostic Code
A. Establish communication between the electronic service
tool and the ECM . Refer to Troubleshooting, “Electronic
Service Tools”, if necessary.
B. Start the engine. Run the engine until the engine is at nor-
mal operating temperature.
C. Observe the “Active Diagnostic” screen on the electronic
service tool. Wait at least 30 seconds so that any codes may
become active.
Diagnostic code Result: One of the diagnostic codes listed in Table 176 is
active.
Proceed to Test Step 2.
Result: The electronic service tool will not communicate with
the ECM.
Repair: Refer to Troubleshooting, “Electronic Service Tool
Does Not Communicate”.
2. Inspect Electrical Connectors and Wiring
A. Ensure that the battery disconnect switch is in the
CLOSED position.
B. Thoroughly inspect all connectors associated with the
electrical power supplies.
C. Check all fuses.
D. Perform a 45 N (10 lb) pull test on each of the wires in the
connectors associated with the electrical power supplies.
E. Check all the wiring associated with the electrical power
supplies for abrasions and pinch points.
F. Verify that the “System Operating Voltage Configuration” is
correctly configured in the Engine ECM configuration
parameters.
Damaged wire or
connector. Blown
fuse.
Result: A damaged wire or damaged connector was found. A
blown fuse was found.
Repair: Repair the damaged wire or the damaged connector.
Replace all blown fuses.
Use the electronic service tool to clear all logged diagnostic
codes. Verify that the repair eliminates the fault.
Result: The “System Operating Voltage Configuration” is
configured incorrectly.
Repair: Program the parameter with the correct system
voltage.
Result: A damaged wire or damaged connector was not
found. The fuses are OK.
Proceed to Test Step 3.
3. Load Test the Batteries
A. Use a suitable battery load tester to test the batteries. Re-
fer to Systems Operation, Testing and Adjusting, “Battery -
Test” for the correct procedure.
Load test Result: The batteries pass the load test.
Proceed to Test Step 4.
Result: The batteries do not pass the load test.
Repair: Recharge or replace the faulty batteries.
Use the electronic service tool to clear all logged diagnostic
codes and verify that the repair eliminates the fault.
4. Check the Charging Circuit
A. Check the charging circuit. Refer to Systems Operation,
Testing and Adjusting, “Charging System - Test”.
Charging circuit Result: The charging system is OK.
Contact the Dealer Solutions Network (DSN).
Result: The charging system is not OK.
Repair: There is a fault in the charging system. Make the
necessary repairs.
Use the electronic service tool to clear all logged diagnostic
codes and verify that the repair eliminates the fault.
318 UENR4469-36
Circuit Tests
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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