
(Table 14, contd)
Troubleshooting Test Steps
Values
Results
4. Low Compression (Cylinder Pressure)
A. Perform a compression test. Refer to Systems Operation, Test-
ing, and Adjusting, “Compression - Test”.
Low compression
Result:
Low compression is recorded on one or more
cylinders.
Possible causes of low compression are shown in the fol-
lowing list:
·
Loose glow plugs
·
Faulty piston
·
Faulty piston rings
·
Worn cylinder bores
·
Worn valves
·
Faulty cylinder head gasket
·
Damaged cylinder head
Make any repairs, as necessary.
Result:
No faults found.
Proceed to Test Step 5.
5. Individual Malfunctioning Cylinders
A. With the engine speed at a fast idle, use the electronic service
tool to perform the manual
“
Cylinder Cut Out Test
”
. As each cylin-
der is cut out, listen for a change in the sound from the engine.
When a cylinder is cut out, there should be a noticeable change in
the sound of the engine.
Cylinders
Result:
There is not a noticeable change in the sound of
the engine for at least one cylinder.
Investigate the cause of the fault on any cylinder that is
not operating. Investigate the cause of the fault on any cyl-
inder that is operating below normal performance.
Result:
There is a noticeable change in the sound of the
engine for each cylinder.
Contact the Dealer Solution Network (DSN).
i05992289
Diesel Particulate Filter Active
Regeneration
Was
Interrupted
This procedure covers the following diagnostic code:
Table 15
Diagnostic Trouble Code for Diesel Particulate Filter (DPF) Active Regeneration Interrupted
J1939 Code
Description
Notes
5319-31
Aftertreatment 1 Diesel Particulate Filter Incomplete
Regeneration
The Electronic Control Module (ECM) has interrupted an active
regeneration.
The maximum duration for an active regeneration has been ex-
ceeded three times.
If equipped, the warning lamp will flash. The engine will be de-
rated. The ECM will log the diagnostic code.
The code will become inactive once a successful active regen-
eration has occurred.
Perform the following steps:
Recommended Actions
Note:
The procedures have been listed in order of
probability. Complete the procedures in order.
48
UENR0612
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