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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.


image WARNING! Read the safety instructions for handling and service in the chapter ”Safetyinformation” before starting work.



Symptoms and possible causes

imageThe 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


11.


Water/contamination in fuel


20.


Defective thermostat

2.

Poor contact/open circuit in

12.

Faulty unit injector

21.

Blocked intercooler

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


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


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



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