176 KENR9126
Troubleshooting Section
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
5.0N·m(44lbin).
Use the electronic service tool in order to clear all
logged diagnostic codes and then verify that the
repair elim
inated the fault.
Use the electronic service tool in order to perform
the fuel rai
l pump solenoid test.
If the diagnostic code does not reappear, then
install th
e new fuel rail pump to the engine. Refer to
Disassembly and Assembly Manual, “Fuel Injection
Pump- Install”.
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 connector from the fuel rail pump
solenoid.
C. Turn the keyswitch to the ON position.
D. Use the
electronic service tool in order to perform
the solenoid test for the fuel rail pump.
Expec
ted Result:
A “Current Below Normal” diagnostic code is
displ
ayed. The “Current Above Normal” diagnostic
code is not displayed.
Resu
lts:
•
OK – A “Current Below Normal” diagnostic code is
disp
layed. The harness has no shorts to supply or
ground. The fuel rail pump solenoid is faulty.
Rep
air: 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
(4
4lbin).
Use the electronic service tool in order to perform
th
e solenoid test for the fuel rail pump.
Verify that the repair eliminates the fault.
If the diagnostic code has been cleared, then install
the new fuel rai
l 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 elimi
nates 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 harness for the
Fuel R ail Pump Solenoid for a S hort
Circuit
A. Turn the k
eyswitch to the OFF position.
B. Disconnect the P532 connector from the fuel rail
pump sole
noid.
C. Disconnect the P2 connector from the ECM.
D. Measure the resistance between P2:26 and P2:25.
E. Measure
the resistance between P2:25 and
voltage +.
F. Measur
e the resistance between P2:25 and the
voltage (-).
G. Measur
e the resistance between P2:26 and
voltage +.
H. Measu
re the resistance between P2:26 and
voltage (-).
Expe
cted Result:
The resistance is greater than 20,000 Ohms.
Results:
•
OK –
The harness has no short circuit to supply
or ground. The ECM is suspect. Proceed to Test
Step 7.
•
Not OK – The harness has a short circuit.
Re
pair: Repair the harness and connectors or
replace the faulty harness and connectors.
Co
nnect the P532 connector to the fuel rail pump
solenoid.
C
onnect the P2 connector to the ECM.
Turn the keyswitch to the ON position.
Use the electronic service tool in order to perform
the solenoid test for the fuel rail pump.
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