Perkins NJ Series Troubleshooting Manual page 174

174
Troubleshooting Section
Test Step 4. Check the Fuel Rail Pump
Solenoid for an Open Circuit
A. Turn the keyswitch to the OFF position.
B. Disconnect the fuel rail pump solenoid connector
from the fuel rail pump solenoid.
C. Measure the resistance of the fuel rail pump
solenoid.
Expected Result:
The nominal resistance is less than 1 Ohm.
Results:
• OK – There is an open circuit or there is an
excessive resistance in 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 all connectors are correctly
coupled.
Use the Perkins EST in order to perform the fuel
rail pump solenoid test.
Use the electronic service tool in order to clear all
logged diagnostic codes and then verify that the
repair eliminated the fault.
STOP.
•
Not OK – The fuel rail pump solenoid is faulty.
Repair: Temporarily connect a new fuel rail pump
to the harness, but do not install the fuel rail pump
to the engine.
Reconnect the P2 to the ECM. Check the screw
for the ECM connector for the correct torque of
5.0 N·m (44 lb in).
Use the Perkins EST in order to perform the fuel
rail pump solenoid test.
Use the electronic service tool in order to clear all
logged diagnostic codes and then verify that the
repair eliminated the fault.
If the diagnostic code has been cleared, then install
the new fuel rail pump to the engine. Refer to
Disassembly and Assembly Manual, "Fuel Injection
Pump- Install".
Use the electronic service tool in order to clear all
logged diagnostic codes and then verify that the
repair eliminates the fault.
STOP.
Test Step 5. Check the Fuel Rail Pump
Solenoid for a Short Circuit
A. Turn the keyswitch to the OFF position.
B. Disconnect the fuel rail pump solenoid connector.
C. Turn the keyswitch to the ON position.
D. Use the Perkins EST in order to perform the fuel
rail pump solenoid test.
Expected Result:
A Current Below Normal diagnostic code is displayed.
The Current Above Normal diagnostic code is not
displayed.
Results:
• OK – A Current Below Normal diagnostic code is
displayed. The harness has no shorts to supply or
ground. The fuel rail pump solenoid is faulty.
Repair: Temporarily connect a new fuel rail pump
to the harness, but do not install the fuel rail pump
to the engine.
Reconnect P2 to the ECM. Check the screw for the
ECM connector for the correct torque of 5.0 N·m
(44 lb in).
Use the Perkins EST in order to perform the fuel
rail pump solenoid test.
Verify that the repair eliminates the fault.
If the diagnostic code has been cleared, then install
the new fuel rail pressure pump to the engine.
Refer to Disassembly and Assembly, "Electrical
Connectors - Inspect".
Use the electronic service tool in order to clear all
logged diagnostic codes and then verify that the
repair eliminates the fault.
STOP.
• Not OK – The harness is a short circuit or the ECM
is a short circuit. Proceed to Test Step 6.
Test Step 6. Check the Fuel Rail Pump
Solenoid Harness for a Short Circuit
A. Turn the keyswitch to the OFF position.
SENR9982-01