Fault Tracing - Volvo Penta D8 2020 Operator's Manual

Fault handling
A number of symptoms and possible causes of engine malfunctions are described in the table below. Always
contact your Volvo Penta dealer if problems occur which you can not solve by yourself.
NOTICE! Read through the safety advice for care and maintenance work in the Safety precautions for
maintenance and service operations chapter before starting work.
Symptoms and possible causes
Pop-ups are shown in the tachometer display
Engine can not be stopped
Starter motor does not rotate
Starter motor rotates slowly
Starter motor rotates normally but engine does not start 1, 11, 12, 13, 14, 37, 38
Engine starts but stops again
Engine does not reach full operating speed at full throttle 12, 13, 14, 15, 16, 17, 18, 19, 20, 23, 33, 36, 38, 39
Engine runs unevenly
Engine vibrates
High fuel consumption
Black exhaust smoke
Blue or white exhaust smoke
Lubrication oil pressure too low
Coolant temperature too high
Coolant temperature too low
No charge or poor charge
1. Flat batteries
2. Poor contact/open circuit in cables
3. Main switch turned off
4. One of the semi-automatic circuit breakers in the distribution box has tripped
5. Faulty key switch
6. Control lever not in neutral/control position not activated
7. Faulty stop relay
8. Faulty main relay
9. Faulty starter relay
10. Faulty starter motor/solenoid
11. Lack of fuel:
- fuel taps closed
- fuel tank empty
- wrong tank connected
12. Blocked fine fuel filter/pre-filters
(caused by contamination or fuel stratification at low temperature)
13. Air in the fuel system
14. Water/contamination in fuel
15. Boat abnormally loaded
16. Fouling on hull/propeller
17. Cables for unit injector damaged (open circuit)
18. Faulty unit injectors (nozzles)
42

Fault Tracing

See chapter Fault Code Register
2, 4, 5, 7, 8
1, 2, 3, 4, 5, 6, 8, 9, 10, 35, 38, 41
1, 2
1, 11, 12, 13, 14, 19, 36, 38
14, 15, 39
24
15, 16, 18, 21, 36
19
21, 34
22
25, 26, 27, 28, 29, 30, 31, 32
31
2, 40
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