(Table 182, contd)
Troubleshooting Test Steps
Values Results
3. Create a Short Circuit at the EFLP Relay
A. Turn the keyswitch to the OFF position.
B. Disconnect the harness connector for the Electric Fuel Lift
Pump (EFLP) relay.
C. Fabricate a jumper wire that is 150 mm (6 inch) long.
D. Use the jumper wire to connect Test Point 1 to Test Point 2
on the harness connector for the EFLP relay. Refer to Illustra-
tion 112 . Refer to the appropriate electrical schematic.
E. Turn the keyswitch to the ON position. Do not start the
engine.
F. Use the electronic service tool to check for an active 1075-6
or 3666-6diagnostic code.
G. Wait for at least 2 minutes for the EFLP to deactivate.
Check for an active 1075-5 or 3666-5 diagnostic code.
H. Turn the keyswitch to the OFF position.
I. Remove the jumper. Leave the connector for the EFLP
disconnected.
Open circuit Result: A 1075-6 or 3666-6 diagnostic code was active with
the jumper installed.
Repair: Install a replacement EFLP relay.
Reconnect the connector for the EFLP relay.
Turn the keyswitch to the ON position. Do not start the en-
gine. Check for active diagnostic codes.
Wait for at least 2 minutes for the EFLP to deactivate.
Check for active diagnostic codes.
Confirm that the fault has been eliminated.
Result: A 1075-5 or 3666-5 diagnostic code is still active
with the jumper installed. There is a fault in the wiring or the
ECM.
Proceed to Test Step 4.
4. Check the Wiring Between the ECM and the EFLP Relay
for an Open Circuit
A. Turn the keyswitch to the OFF position.
B. Disconnect the EFLP relay. Disconnect the J1 connector
from the ECM.
C. Use a multimeter to measure the resistance between the
following points:
· J1:49 and Test Point 1 on the harness connector for the relay
· J1:7 and Test Point 2 on the harness connector for the relay.
Less than 2 Ohms Result: At least one of the resistance measurements is
greater than 2 Ohms.
Repair: The fault is in the wiring between the EFLP relay
and the ECM.
Repair the faulty wiring or replace the faulty wiring. Use the
electronic service tool to clear all logged diagnostic codes
and verify that the repair eliminates the fault.
Result: Both resistance measurements are less than 2
Ohms.
Contact the Dealer Solutions Network (DSN).
5. Create an Open Circuit at the Relay
A. Turn the keyswitch to the OFF position.
B. Disconnect the harness connector for the EFLP relay.
C. Turn the keyswitch to the ON position. Do not start the
engine.
Wait for at least 2 minutes for the EFLP to deactivate.
D. Use the electronic service tool to check for an active 1075-
6 or 3666-6 diagnostic code.
E. Turn the keyswitch to the OFF position.
Fault moves to
another injector
Result: A 1075-5 or 3666-5 diagnostic code is active.
Repair: Install a replacement relay.
Turn the keyswitch to the ON position. Do not start the
engine.
Wait for at least 2 minutes for the EFLP to deactivate.
Check for active diagnostic codes.
Confirm that the fault has been eliminated.
Result: A 1075-6 or 3666-6 diagnostic code is still active.
Proceed to Test Step 6.
(continued)
UENR4469-36 327
Circuit Tests
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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