Perkins NJ Series Troubleshooting Manual page 191

SENR9982-01
Use the Perkins Electronic Service Tool (EST) 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.
Illustration 77
Typical example of the electronic unit injector
Test Step 1. Check for Diagnostic Codes
That Are Related to this Procedure.
A. Connect the Perkins EST 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 (1106D engine only)
•
6-2 Cylinder #6 Injector erratic, intermittent, or
incorrect (1106D engine only)
Expected Result 2
On four cylinder engines, two injectors that share a
common supply indicate a diagnostic code.
Note: Injectors 1 and 4 share a common injector
driver circuit in the ECM. Injectors 2 and 3 share a
common driver 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 driver 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:
g01208822
• 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 related diagnostic codes are logged.
STOP.
Test Step 2. Check the Faulty Cylinder
Numbers
A. Use the Perkins EST in order to make a note of
the logged diagnostic codes.
B. Use the noted diagnostic codes in order to check
the cylinders for faulty injectors.
Expected Result:
The diagnostic codes indicate the cylinder numbers
that have faulty injectors.
Results:
•
OK – No related diagnostic codes are logged.
STOP.
• Not OK – The diagnostic codes indicate the
cylinder numbers that have faulty injectors.
Repair: Replace the faulty injectors.
191
Troubleshooting Section