Mercedes-Benz OM 904 LA, Руководство по эксплуатации

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Problem Possible causes/consequences and
M
Solutions
Fuel consumption is
too high. Connection points (unit pump – line and fuel injectors) are leaking.
X
Have a qualified specialist workshop check for leaks.
X
Misfiring: have the engine checked at a qualified specialist
workshop.
The engine cuts off too
early (maximum engine
speed cannot be
reached). The engine management (MR) control unit is faulty or parametr-
ised incorrectly.
X
Consult a qualified specialist workshop.
The engine gets too hot
(according to the cool-
ant temperature
gauge). There is not enough coolant in the cooling system.
X
Top up, bleed (
Y
page 77).
The coolant temperature sensor or display is faulty.
X Replace the sensor or display.
The poly-V-belt is damaged.
X
See "Replacing the poly-V-belt" (
Y
page 95).
The fan does not switch on correctly.
X
Consult a qualified specialist workshop.
The radiator is dirty on the inside; the radiator is very dirty on the
outside.
X
Clean the radiator.
The thermostat is faulty.
X
Check and replace as necessary.
X Consult a qualified specialist workshop.
The charge current indi-
cator lamp does not
light up while the
engine is not running. The lamp is faulty or the supply line is interrupted.
X
Replace the lamp or repair the break in the cable.
The charge current indi-
cator lamp lights up
when the engine is run-
ning. The poly-V-belt tension is insufficient.
X Check the belt tensioner function.
The poly-V-belt is torn.
X
Replace the poly-V-belt (
Y
page 95).
The alternator or sensor is faulty.
X
Check the alternator or sensor.
X Consult a qualified specialist workshop.
92
Troubleshooting
Breakdown assistance