DAF CF65 Series Service Manual page 40

DIAGNOSTICS
CE engine inlet/exhaust system
3.2 FAULT-FINDING TABLE
1
Air filter element blocked
Turbocharger defective/wastegate control incor-
rect
Air leak in inlet system
Air filter element partially blocked
Air leak in inlet system
Turbocharger defective
Air leak in inlet system
Turbocharger defective
Blocked turbocharger air intake
Compressor side of turbocharger contaminated
Turbocharger damaged
Air filter element blocked
Air leakage between turbocharger and inlet mani-
fold
Air leakage between the inlet manifold and cylinder
head
3-2
SYMPTOM: REDUCED POWER AT ALL ENGINE SPEEDS
Possible cause
SYMPTOM: REDUCED POWER ABOVE A CERTAIN ENGINE SPEED
Possible cause
SYMPTOM: FUEL CONSUMPTION TOO HIGH
Possible cause
SYMPTOM: REDUCED MAXIMUM ENGINE SPEED
Possible cause
SYMPTOM: RISING AND FALLING TURBOCHARGER SOUNDS
Possible cause
SYMPTOM: BLACK SMOKE EMERGES FROM EXHAUST
Possible cause
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Remedy
Replace the air filter element
Check the turbocharger/wastegate control
Pressure-test the inlet system
Remedy
Check/replace the air filter element
Pressure-test the inlet system
Remedy
Check the turbocharger
Pressure-test the inlet system
Remedy
Check the turbocharger
Remedy
Check air intake and remove any obstacles
Clean compressor side with a non-corrosive clean-
ing agent or a soft brush. Check the intake side for
carbon deposits or other contamination
Replace the turbocharger and identify the cause
Remedy
Replace the air filter element
Check flexible pipes and pressurise intake unit
Check for leakage. Replace gaskets, if necessary
4
series
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200416