Detroit Diesel MBE 4000 Service Manual page 577

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The air filter and/or intake air system is clogged.
The exhaust brake valve is malfunctioning.
The intake air preheater is malfunctioning.
The valves are not adjusted properly.
There is damage to the fuel system: the fuel pump, one
or more fuel injectors, or one or more unit pumps are
damaged.
The charge-air temperature sensor is damaged.
There is internal damage to the engine.
The engine oil level is too high (engine oil is reaching
the combustion chamber).
The turbocharger is leaking oil.
The valve stem seals are loose or damaged.
The piston rings are worn.
The engine brake control switch is damaged.
The exhaust brake is not operating properly.
The constant-throttle valves are malfunctioning.
Components of the PLD and/or VCU control unit are
damaged.
One or more of the cruise control switches are damaged.
Components of the PLD and/or VCU control unit are
damaged or not working properly.
All information subject to change without notice.
6SE412 0403 Copyright © 2004 DETROIT DIESEL CORPORATION
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Problem—The Engine Exhaust Is Black
Cause
Problem—The Engine Exhaust Is Blue
Cause
Problem—Engine Brake Performance Is Poor
Cause
Problem—Cruise Control Is Not Working
Cause
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MBE 4000 SERVICE MANUAL
Remedy
Check the air restriction indicator. Clean the intake air
system and replace the air filter if necessary.
Have an authorized dealer check the operation of the
valve.
Check that the heater is not staying on all of the time.
Check the valve lash.
Bring the vehicle to an authorized dealer for service.
Bring the vehicle to an authorized dealer for service.
Bring the vehicle to an authorized dealer for service.
Remedy
Adjust the oil level, and then have the oil level checked
by an authorized dealer.
Have an authorized dealer replace the turbocharger
Have an authorized dealer replace the seals.
Have an authorized dealer replace the piston rings.
Remedy
Replace the switch
Have an authorized dealer check the operation of the
valve.
Bring the vehicle to an authorized dealer for service.
Bring the vehicle to an authorized dealer for service.
Remedy
Replace the damaged switch.
Bring the vehicle to an authorized dealer for service.
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