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96
TM 9-2320-312-24-2
Troubleshooting Section
2. Check the air inlet system for restrictions
If the vehicle speed is greater than the "VSL", the
or leakage. Check the exhaust system for
Power is limited. If a problem is discovered, refer to
restrictions or leakage. Refer to Testing and
Troubleshooting, "Vehicle Speed Circuit - Test".
Adjusting, "Air Inlet and Exhaust System -
Inspect".
Power Train Data Link
Individual Cylinder Malfunction
1. Check the power train data link. Ensure that the
SAE J1922 data link or the SAE J1939 data link
is not limiting the power.
1. Ensure that the electronic unit injector connector
(J300/P300) is fully connected and ensure that
2. Connect the electronic service tool to the cab
the electronic unit injector connector (J300/P300)
data link connector.
is free of corrosion.
3. Monitor the "Powertrain Data Link" status screen
2. Ensure that the ECM engine harness connector
while the vehicle is experiencing problems.
(J2/P2) is fully connected and ensure that the
engine harness connector (J2/P2) is free of
If the "Powertrain Data Link" status screen
corrosion.
indicates that the data link is limiting the power or
the rpm, verify that this is not normal operation. If
3. Connect the electronic service tool to the cab
this is not normal operation, refer to the vehicle
data link connector. Use the Cylinder Cutout Test.
OEM for repairs.
Access the Cylinder Cutout Test by selecting the
"Diagnostic Menu" and the "Diagnostics Test
Menu". Run the Cylinder Cutout Test in order to
Fuel Supply
disable each cylinder. Disabling each cylinder
allows the technician to isolate the misfiring
1. Monitor the exhaust for smoke while the engine
cylinders.
is being cranked.
If the misfiring cylinder can be isolated to
If no smoke is present, there may be a problem
a specific cylinder, refer to Troubleshooting,
with the fuel quality or there may be a problem
"Injector Solenoid Circuit - Test".
with the fuel supply.
4. Perform a Performance Analysis Report (PAR).
2. Check the fuel quality. Refer to the Truck
Performance and Driveability Diagnostic Guide,
Low Injection Actuation Pressure
LEBT3477.
3. Check the fuel pressure. Refer to Testing and
1. Check the engine oil level. Engine oil is used to
Adjusting, "Fuel System Pressure - Test".
activate the high pressure hydraulic pump.
4. Ensure that the fuel system has been primed.
2. Ensure that the engine oil meets the
Refer to Testing and Adjusting, "Fuel System -
recommendations of the engine manufacturer.
Prime".
Refer to the Operation and Maintenance Manual
for further details.
5. Check for fuel supply lines that are restricted.
3. Crank the engine and monitor the injection
6. Check the fuel filters.
actuation pressure and the output of the injection
actuation pressure control valve. The high
7. If the temperature is below 0 C (32 F), check
pressure oil system is operating properly if the
pressure output is a minimum of 6 MPa (870 psi).
for solidified fuel (wax).
4. Connect the electronic service tool and check for
8. Check for air in the fuel system. Refer to Testing
event code 164-11 injection actuation pressure
and Adjusting, "Air in Fuel - Test".
system fault. If an 164-11 event code has
been logged recently, refer to Troubleshooting,
Air Inlet and Exhaust System
"Injection Actuation Pressure -Test".
1. Check for leakage in the air-to-air aftercooler
core . Refer to Testing and Adjusting, "Aftercooler
- Test".

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