KENR6933 159
Troubleshooting Section
If the ECM is replaced then the replacement
ECM must be corr
ectly programmed. Refer to
Troubleshooting, “Replacing the ECM” for further
information.
Use the electronic service tool in order to perform the
“Fuel System Verification Test”. The “Fuel System
Verification
Test” is used to check that the system
operates correctly after a repair has been made.
g01336666
Illustration 59
Typical exam ple of the electronic unit injector
Test Step 1. Check for Diagnostic C odes
That Are Related to this Procedure
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 this procedure.
D. Make a note of the logged diagnostic codes.
Expected Result:
Expected Result 1
One or more of the following diagnostic codes are
logged:
•
1-2 Cylinder #1 Injector erratic, intermittent, or
incorrect
•
2-2 Cylinder #2 Injector erratic, intermittent, or
incorrect
•
3-2 Cylinder #3 Injector erratic, intermittent, or
incorrect
•
4-2 Cylinder #4 Injector erratic, intermittent, or
incorrect
•
5-2 Cylinder #5 Injector erratic, intermittent, or
incorrect
•
6-2 Cylinder #6 Injector erratic, intermittent, or
incorrect
Expected Result 2
On four cylinder engines, two injectors that share a
common supply indicate a diagnostic code.
Note: Injectors1and4shareacommoninjector
driver circuit in the ECM. Injectors 2 and 3 share a
common drive
r circuit in the ECM. If two injectors that
share a common supply indicate a diagnostic code
then this is probably caused by a faulty ECM.
On six cylinder engines, three injectors that share a
common supply indicate a diagnostic code.
Note: Injectors 1, 2 and 3 share a common injector
driver circuit in the ECM. Injectors 4, 5 and 6 share a
common driv
er circuit in the ECM. If three injectors
that share a common supply indicate a diagnostic
code then this is probably caused by a faulty ECM.
Results:
•
OK – Result 1
One or more diagnostic codes are
logged. Proceed to Test Step 2.
•
OK – Result 2
On four cylinder engines, two
injectors that share a common supply indicate a
diagnostic code. On six cylinder engines, three
injectors
that share a common supply indicate a
diagnostic code. Proceed to Test Step 3.
•
Not OK – No r
elated diagnostic codes are logged.
STOP.
Test Step 2
. Check the Faulty Cylinder
Numbers
A. Use the electronic service tool in order to make a
note of th
e logged diagnostic codes.
B. Use the noted diagnostic codes in order to check
the cyli
nders for faulty injectors.
Expected Result:
The diagnostic codes indicate the cylinder numbers
that have faulty injectors.
Results:
•
OK –Nore
lated diagnostic codes are logged.
STOP.
To Next Page
Loading...
