Perkins NJ Series Troubleshooting Manual page 196

196
Troubleshooting Section
Illustration 83
Typical example of the fuel injector harness connector
Illustration 84
Typical example of the connector on the valve mechanism cover
Test Step 1. Inspect Electrical Connectors
and Wiring
Electrical shock hazard. The electronic unit injec-
tor system uses 67-73 volts.
A. Turn the keyswitch to the OFF position. A strong
electrical shock hazard is present if the keyswitch
is not turned OFF.
B. Thoroughly inspect connector P2. Thoroughly
inspect the connectors at the valve cover base.
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 injector solenoids.
D. Check the screw for the ECM connector for the
correct torque of 5.0 N·m (44 lb in).
E. Check the harness and wiring for abrasion and for
pinch points from the injectors to the ECM.
Expected Result:
All connectors, pins, and sockets are completely
coupled and/or inserted and the harness is free of
corrosion, of abrasion and of pinch points.
Results:
• OK – The harness is OK. Proceed to Test Step 2.
• Not OK – There is a fault in the connectors and/or
the harness.
Repair: Repair the connectors or the harness
and/or replace the connectors or the harness.
Ensure that all of the seals are correctly in place
and ensure that the connectors are completely
coupled.
SENR9982-01
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