164 KENR6933
Troubleshooting Section
Test Step 2. C heck for Logged Diagnostic
Codes that are Related to the Injector
Solenoids
A. Connect the electronic service tool to the
diagnostic connector.
B. Turn the keyswitch to the ON position.
C. Check for log
ged diagnostic codes that are related
to the injector solenoids on the electronic service
tool.
Expected Result:
Oneormoredi
agnostic codes that are related to the
injector solenoids have been logged:
•
1-5 Cylinde
r #1 Injector current below normal
•
1-6 Cylinder #1 Injector current above normal
•
2-5 Cylinder #2 Injector current below normal
•
2-6 Cylinde
r #2 Injector current above normal
•
3-5 Cylinder #3 Injector current below normal
•
3-6 Cylinder #3 Injector current above normal
•
4-5 Cylinde
r #4 Injector current below normal
•
4-6 Cylinder #4 Injector current above normal
•
5-5 Cylinder #5 Injector current below normal
•
5-6 Cylinde
r #5 Injector current above normal
•
6-5 Cylinder #6 Injector current below normal
•
6-6 Cylinder #6 Injector current above normal
Results:
•
OK – One or more diagnostic codes have been
logged. Pro
ceed to Test Step 3.
•
Not OK – No diagnostic codes have been logged.
Proceed to T
est Step 4.
Test Step 3. Use the “Injector Solenoid
Test”
A. Start the engine.
B. Allow the e
nginetowarmuptothenormal
operating temperature.
C. Stop the en
gine.
D. Turn the keyswitch to the ON position.
E. Access the “Injector Solenoid Test” by accessing
the following d
isplay screens in order:
•
“Diagnostics”
•
“Diagnostic Tests”
•
“Injector Sol
enoid Test”
F. Activate the test.
Note: Do not confuse the “Injector Solenoid Test”
with the “Cylinder Cutout Test”. The “Cylinder Cutout
Test” is used t
oshutofffueltoaspecific cylinder
while the engine is running. The “Injector Solenoid
Test” is used to actuate the injector solenoids while
the engine is
not running. This allows the click of the
injector solenoids to be heard while the engine is off
in order to determine that the circuit is functioning
correctly.
G. As each solenoid is energized by the ECM, an
audible cli
ck can be heard at the valve cover.
Expected Result:
All cylinders indicate “OK”.
Results:
•
OK – There is not an electronic fault w ith the
injectors a
t this time.
Repair: If the “Injector Solenoid Test” returned a
“Not OK” for
any injector, refer to Troubleshooting,
“Engine Misfires, Runs Rough or Is Unstable”.
STOP.
•
Open – Note the cylinders that indicate “Open”.
Proceed to
Test Step 5.
•
Short – Note the cylinders that indicate “Short”.
Proceed to
Test Step 4.
Test Step 4. Check the Variation of the
Injectors between Cylinders
A. Start the engine.
B. Allow the
engine to warm up to normal operating
temperature.
C. After the
engine is warmed to operating
temperature, access the “Cylinder Cutout Test” by
accessing the following display screens in order:
•
“Diagnostics”
•
“Diagnos
tic Tests”
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