Table 182
Troubleshooting Test Steps
Values Results
1. Inspect Electrical Connectors and Wiring
A. Turn the keyswitch to the OFF position.
B. Thoroughly inspect the connectors between the EFLP relay
and the engine ECM. Refer to Troubleshooting, “Electrical
Connectors - Inspect” for details.
C. Perform a 45 N (10 lb) pull test on each of the wires in the
ECM connector that are associated with the EFLP relay.
D. Check the screw for the ECM connector for the correct tor-
que of 6 N·m (53 lb in).
E. Check the harness and wiring for abrasion and for pinch
points from the injectors to the ECM.
Loose connection
or damaged wire
Result: There is a fault in a connector or the wiring.
Repair: Repair any faulty connectors or replace the wiring
harness. Ensure that all of the seals are properly in place
and ensure that the connectors are correctly coupled.
Use the electronic service tool to clear all logged diagnostic
codes and verify that the repair eliminates the fault.
Result: All connectors, pins, and sockets are correctly
coupled and/or inserted. The harness is free of corrosion,
abrasion, and pinch points.
Proceed to Test Step 2.
2. Check for Active Diagnostic Codes
A. Connect the electronic service tool to the diagnostic
connector.
B. Turn the keyswitch to the ON position. Do not start the
engine.
C. Make a note of any active diagnostic codes.
D. Wait for at least 2 minutes for the Electric Fuel Lift Pump
(EFLP) to deactivate. Make a note of any active diagnostic
codes.
Diagnostic codes Result: Diagnostic code 1075-5 or 3666-5 is active when
the EFLP is switched off.
Proceed to Test Step 3.
Result: Diagnostic code 1075-6 or 3666-6 is active when
the EFLP is switched on.
Proceed to Test Step 5.
Result: An active diagnostic code or a recently logged di-
agnostic code was not displayed. There may be a fault with
the switched power circuit for the EFLP. The ECM does not
monitor the status of this condition.
Proceed to Test Step 7.
(continued)
326 UENR4469-36
Circuit Tests
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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