Group 23 EMS 2 Fault tracing
32
Fault tracing
A number of symptoms and possible causes of engine malfunctions are described in the table below. Always con-
tact your Volvo Penta dealer if any problems occur which you can not solve by yourself.
WARNING! Read the safety instructions for handling and service in the chapter ”Safetyinformation” before
starting work.
Symptoms and possible causes
The diagnostic indicator is blinking Please refer to the “Diagnostic information” chapter
Engine can not be stopped. 2, 5
Starter motor does not rotate 1, 2, 3, 4, 5, 6, 7, 24
Starter motor rotates slowly 1, 2
Starter motor rotates normally but engine does not start 8, 9, 10, 11,
Engine starts but stops again 8, 9, 10, 11, 13
Engine does not reach correct operating speed at full throttle 9, 10, 11, 12, 13, 21, 25, 26
Engine runs roughly 10, 11
High fuel consumption 12, 13, 15, 25
Black exhaust smoke 12, 13
Blue or white exhaust smoke 14, 15, 22
Too low lubrication oil pressure 16
Excessive coolant temperature 17, 18, 19, 20
Too low coolant temperature 20
No, or poor charge 2, 23
1. Flat batteries
2. Poor contact/open circuit in
electrical cable
3. Main switch turned off
4. Main circuit breaker faulty
5. Faulty ignition lock
6. Faulty main relay
7. Faulty starter motor/solenoid
8. No fuel:
– fuel cocks closed
– fuel tank empty/wrong tank
connected
9. Blocked secondary fuel filter/-
primary filter (because of
contam ination, or stratification
of the fuel at low temperature)
10. Air in the fuel system
11. Water/contamination in fuel
12. Faulty unit injector
13. Insufficient air supply to the
engine:
–clogged air filter
–air leakage between the turbo
and the engine’s inlet pipe
–dirty compressor part
in the turbocharger
–faulty turbocharger
–poor engine room ventilation
14. Excessive coolant temperature
15. Too low coolant temperature
16. Too low oil level
17. Coolant level too low
18. Air in the coolant system
19. Faulty circulation pump
20. Defective thermostat
21. Blocked intercooler
22. Too high oil level
23. Alternator drive belt slips
24. Water entry into engine
25. High back pressure in the
exhaust system
26. Break in “ Pot+ ” cable to
pedal

دیزل ژنراتور | ماشین های راهسازی | لودر | بیل مکانیکی | لیفتراک | موتور پمپ | پمپ آب