Man D 2876 LE 101 Operating Instructions Manual page 38

1. EDC self-diagnosis or flash code output
2. Starter turns over engine only slowly or not at all
3. Starter turns, engine does not start, engine does not start / difficult to start when cold
4. Engine stalls (dies) during operation, no longer starts (starter turns),
engine does not start / starts with difficulty when hot
5. Sudden, temporary engine shut-down, engine does not reach full revs
6. Engine only runs at idle speed, no throttle response
7. Engine only runs at increased idle speed, no throttle response
8. Rated engine speed distinctly reduced (even under no load)
9. Reduced output in all ranges
10. Irregular engine operation, traction loss
11. Unstable idle speed, engine hunting, misfiring, knocking in engine
12. Engine judder
13. Unusual combustion noise
x x
x x
x
x
x o x o
x x o
o x
x
x
x x x o o
x x o o
x o o o
x o x x o o
x x
x
x
x
x = Probable
o = Possible
Troubleshooting chart
14. Excessive smoke emission: White smoke / blue smoke
15. Excessive smoke emission: Black smoke
16. Engine temperature too high (coolant loss)
17. Intermediate engine speed control cannot be activated / does not switch off, engine revs too
high
18. Fuel consumption too high
19. Lubricating oil pressure too low
20. Lubricating oil pressure too high
21. Lubricating oil consumption too high
22. Engine too loud / mechanical noise
Possible causes
x EDC boost pressure sensor: faulty, incorrect, implausible with atmospheric pres-
sure sensor, line fault
o x Exhaust turbocharger leaking or faulty
x Turbine and compressor rotor in turbocharger dirty (out-of-balance, irregular run-
ning)
x Intercooler leaking, faulty
x Flame starting system defective
x EDC coolant temperature sensor: faulty, line fault
EDC charge-air temperature sensor: faulty, line fault
x Radiator dirty or cooling system failure (temperatures too high)
x Coolant level too low, air in coolant circuit
x V-belt for water pump drive not tensioned correctly
x x Incorrect V-belt tension
x Water pump leaking, faulty / thermostat faulty, does not open
x Coolant lines leaking, clogged or twisted
x Coolant entering combustion chamber (cylinder head / gasket leaking)
o Resistor bank EDC control unit pin 51
Power supply to control unit interrupted or battery voltage too low / Relay K1
faulty
Line terminal 15 to EDC control unit (pin 47) interrupted / loose contact
x Line defective: Pin 23 or 41
EDC control unit faulty (internal fault)
o x Incorrect EDC control unit (check MAN part number)
o Incorrect intermediate speed switched on
EOL programming terminated / voltage interrupt
Afterrunning not completed (e.g. shutdown via EMERGENCY STOP)
x EOL programming: configuration incorrect
Engine bearings worn
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