168 KENR6933
Troubleshooting Section
D. Turn the keyswitch to the ON position.
E. Perform the “Injector Solenoid Test” at least two
times.
Expected Result:
All of the inje
ctors that were disconnected indicate
“Current Below Normal”.
Results:
•
OK – All of the injectors that were disconnected
indicate “Cur
rent Below Normal”.
Repair: Leave the injector wires disconnected.
The supply wir
e is not shorted to the engine.
Proceed to Test Step 11.
•
Not OK – One or more of the injectors that were
disconnected indicate “Current Above Normal”.
Repair: The fault is most likely in the supply to the
injector. Inspect the connectors for moisture and for
corrosion. A
lso, check the supply wire’s insulation
for damage and for strands that are exposed.
Repair the in
jector harness or replace the injector
harness under the valve cover.
Use the elect
ronic service tool to clear all logged
diagnostic codes and then verify that the repair has
eliminated the fault.
STOP.
Test Step 11
. Check fo r a Short Circuit in
the Return
Wire
Electrical shock hazard. The electronic unit inje c-
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. Disconnect the connector P2 from the ECM.
C. Locate the terminal for the supply of the faulty
injector in the connector P2. Measure the
resistance from the terminal to the engine ground
stud.
Expected Result:
The resistance is greater than 10 Ohms.
Results:
•
OK – The resistance is greater than 10 Ohms.
Repair: Reconn
ect connector P2.
Replace the faulty injector.
Perform the “Injector Solenoid Test”.
Use the electr
onic service tool in order to clear all
logged diagnostic codes and then verify that the
repair eliminates the fault.
STOP.
•
Not OK – There i
s a short in the return line.
Repair: Disconnect the connectors from the valve
cover base.
Measure the resistance of the return wire between
connector P2
and the engine ground stud.
Iftheresistanceislessthan10Ohms,thefaultis
in the return
wire between the ECM and the valve
cover base.
If the resist
ance is greater than 10 Ohms, the fault
is in the return wire under the valve cover.
Repair the in
jector harness or replace the injector
harness.
Use the elect
ronic service tool to clear all logged
diagnostic codes and then perform the “Injector
Solenoid Test” in order to verify that the repair
eliminates
the fault.
STOP.
i02460759
Speed Demand Circu it
(Analog)-T
est
System Operation Description:
Use this pr
ocedure if another procedure has directed
you here. Use this procedure if any of the following
diagnostic codes are active:
•
91-03 Accelerator pedal - voltage above normal
•
91-04 Acce
lerator pedal - voltage below normal
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