KENR6933 145
Troubleshooting Section
F. Insert one end of the jumper into the ECM
connector. Ins
ert the other end of the jumper into
the sensor connector of the engine harness.
G. Reconnect the
connector for the ECM harness
and the sensor connector.
H. Turn the keysw
itch to the ON position.
I. Use the electronic service tool in order to monitor
the “Active Di
agnostic Code” screen for either the
“Voltage Above Normal” diagnostic code for the
sensor or the “Voltage Below Normal” diagnostic
code for the s
ensor.
Expected Result:
The diagnostic code disappears when the jumper is
installed.
Results:
•
OK – There is a
fault in the wiring harness.
Repair: Perform the following repair:
1. Repair the faulty harness or replace the faulty
harness.
2. Clear all diagnostic codes.
3. Use the elect
ronic service tool in order to clear
all logged diagnostic codes and then verify that
the repair eliminates the fault.
STOP.
•
Not OK – The f
ault is intermittent. Proceed to Test
Step 8.
Test Step 8.
Perform the “Wiggle Test” on
the Perkin
s E lectronic Service Tool (EST)
A. Select the “Wiggle Test” from the diagnostic tests
on the elec
tronic service tool.
B. Choose the appropriate group of parameters to
monitor.
C. Press the “Start” button. Wiggle the wiring harness
in order t
o reproduce intermittent faults.
If an intermittent fault exists, the status will be
highligh
ted and an audible beep will be heard.
Expected Result:
No intermittent faults were indicated during the
“Wiggle Test”.
Results:
•
OK – No intermittent faults were found. The
harness and connectors appear to be OK. If this
test was requi
red as part of another procedure,
return to that procedure and continue testing. If
this test has resolved the fault, return the engine
to service. S
TOP.
•
Not OK – At least one intermittent fault was
indicated.
Repair: Repair the harness or the connector.
Use the electronic service tool in order to clear all
logged diagnostic codes and then verify that the
repair elimi
nates the fault.
STOP.
i02657594
Fuel Rai l Pump Soleno id - Test
System Opera
tion Description:
Use this procedure to troubleshoot the system when
one of the fo
llowing diagnostic codes is active or
easily repeated:
•
1779-05 Fue
l Rail #1 Pressure Valve Solenoid
current below normal
•
1779-06 Fue
l Rail #1 Pressure Valve Solenoid
current above normal
Note: The fu
el rail pump is installed on the engine at
the factory. The fuel rail pump is not serviceable part.
The fuel rail pump delivers fuel into the fuel rail at
very high p
ressure.
Use this procedure to troubleshoot the system when
there is a a
ctive diagnostic code or if a diagnostic
code can easily be activated or when another
procedure has directed you here.
The fuel rail pump solenoid is used to control the
output from the fuel rail pump. The solenoid receives
an electr
ical supply from the Electronic Control
Module (ECM). The fuel rail pump solenoid is then
energized when the fuel is required to be pumped
into the f
uel rail. Varying the timing of the voltage to
the solenoid controls the fuel delivery from the fuel
rail pump.
When the fuel rail pump solenoid is deactivated, the
fuel that is not sent to the fuel rail is returned to the
fuel tan
k.
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