KENR9126 191
Troubleshooting Section
Test Step 1. Inspect Electrical Connectors
and Wiring
Electrical shock hazard. The electronic unit injec-
tor system uses 67-73 volts.
A. Turn the keyswitch to the OFF position. A strong
electrical shock hazard is present if the keyswitch
is not turned OFF.
B. Thoroughly inspect connector P2. Thoroughly
inspect the connectors at the valve cover base.
Refer to Troubleshooting, “Electrical Connectors -
Inspect” for details.
C. Perform a 45 N (10 lb) pull test on each of the
wires in the ECM connector that are associated
with injector solenoids.
D. Check the screw for the ECM connector for the
correcttorqueof5.0N·m(44lbin).
E. Check the harness and wiring for abrasion and for
pinch points from the injectors to the ECM.
Expected Result:
All connectors, pins, and sockets are completely
coupled and/or inserted and the harness is free of
corrosion, of abrasion and of pinch points.
Results:
•
OK – The harness is OK. Proceed to Test Step 2.
•
Not OK – There is a fault in the connectors and/or
the harness.
Repair: Repair the connectors or the harness or
replace the connectors or the harness. Ensure that
all of the seals are correctly installed and ensure
that the connectors are completely coupled.
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 2. Check for Logged Diagnostic
Codes t hat 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 logged diagnostic codes that are related
to the injector
solenoids on the electronic service
tool.
Expected Resu
lt:
One or more diagnostic codes that are related to the
injector sol
enoids have been logged:
•
1-5 Cylinder #1 Injector current below normal
•
1-6 Cylinder #1 Injector current above normal
•
2-5 Cylinde
r #2 Injector current below normal
•
2-6 Cylinder #2 Injector current above normal
•
3-5 Cylinder #3 Injector current below normal
•
3-6 Cylind
er #3 Injector current above normal
•
4-5 Cylinder #4 Injector current below normal
•
4-6 Cylinder #4 Injector current above normal
•
5-5 Cylin
der #5 Injector current below normal
•
5-6 Cylinder #5 Injector current above normal
•
6-5 Cylinder #6 Injector current below normal
•
6-6 Cyli
nder #6 Injector current above normal
Results:
•
OK – One or more diagnostic codes have been
logged. Proceed to Test Step 3.
•
Not OK – No diagnostic codes have been logged.
ProceedtoTestStep4.
Test Step 3. Use the “Injector Solenoid
Test”
A. Star
t the engine.
B. Allow the engine to warm up to the normal
ope
rating temperature.
C. Stop the engine.
D. Turn the keyswitch to the ON position.
E. Ac
cess the “Injector Solenoid Test” by accessing
the following display screens in order:
•
“D
iagnostics”
•
“Diagnostic Tests”
•
“Injector Solenoid Test”
F
.
A
ctivate the test.
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