Perkins 1106C - Page 148

148 KENR6933
Troubleshooting Section
Test Step 4. Check the Fu el Rail Pump
Solenoid for an Open Circuit
A. Turn the keyswitch to the OFF position.
B. Disconnect th
e fuel rail pump solenoid connector
from the fuel rail pump solenoid.
C. Measure the re
sistance of the fuel rail pump
solenoid.
Expected Res
ult:
The nominal resistance is less than 1 Ohm.
Results:
•
OK –Thereisan
open circuit or there is an
excessive resistance in the harness.
Repair: Repa
ir the connectors or the harness
and/or replace the connectors or the harness.
Ensure that a
ll of the seals are correctly in place
and ensure that all connectors are correctly
coupled.
Use the electronic service tool 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 elim
inated the fault.
STOP.
•
Not OK – The fuel rail pump solenoid is faulty.
Repair: Te m
porarily 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 electronic service tool in order to perform
the fuel ra
il pump solenoid test.
Use the electronic service tool in order to clear all
logged di
agnostic codes and then verify that the
repair eliminated the fault.
If the dia
gnostic code has been cleared, then install
the new fuel rail pump to the engine. Refer to
Disassembly and Assembly Manual, “Fuel Injection
Pump- Ins
tall”.
Use the electronic service tool in order to clear all
logged diagnos
tic 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 t
he fuel rail pump solenoid connector.
C. Turn the keyswitch to the ON position.
D. Use the electronic service tool in order to perform
the fuel rail pump solenoid test.
Expected Result:
A “Current Be
low Normal” diagnostic code is
displayed. The “Current Above Normal” diagnostic
code is not displayed.
Results:
•
OK – A “Curren
t 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 engin
e.
Reconnect P2 to the ECM. Check the screw for the
ECM connec
tor for the correct torque of 5.0 N·m
(44lbin).
Use the ele
ctronic service tool in order to perform
the fuel rail pump solenoid test.
Verify tha
t the repair eliminates the fault.
If the diagnostic code has been cleared, then install
the new fue
l 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 el
iminates 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 C ircuit
A. Turn the k
eyswitch to the OFF position.