Fault-Tracing - Volvo Penta D4 Operator's Manual

In case of emergency

Fault-tracing

A number of symptoms and possible causes for engine disturbances are described in the table below. If faults or
hitches arise that you cannot solve alone, you must always get in touch with your Volvo Penta dealer.
WARNING! Read the safety directions for maintenance and service in the chapter "Safety information" before
starting work.
Symptom and possible cause
The diagnostic button indicator flashes
Starter motor not turning (or slow)
Engine does not start
Engine starts but stops again
Engine difficult to start
Engine does not reach correct speed at wide open throttle (WOT)
Engine knocks
Engine runs unevenly
Engine vibrates
High fuel consumption
Black exhaust smoke
Blue or white exhaust smoke
Low oil pressure
Engine coolant temperature too high
None or poor charging
1. Discharged battery
2. Loose connection/open-circuit
3. Fuse tripped
4. Lack of fuel
5. Fouled fuel filter.
6. Air in the fuel injection system
7. Water/contaminants in the fuel
8. Boat abnormally loaded
9. Fouling on underwater hull/drive/pro-
peller
*See the "Diagnostic function" chapter for additional information.
44
10. Insufficient air supply
11. Engine coolant temperature too high
12. Engine coolant temperature is too low
13. Lubricating oil level too low.
14. Blocked oil filter
15. Defective/incorrect propeller
16. Defective engine mounting
17. Too little coolant
18. Blocked seawater intake/pipe/filter
See the "Diagnostic function" chapter
1, 2, 3, 24
4, 5, 6, 7, 24
6, 7, 24
4, 5, 6, 7
5, 6, 7, 8, 9, 10, 11, 15, 18, 19, 20, 21, 24
4, 5, 6, 7
4, 5, 6, 7, 10, 11
15, 16
8, 9, 10, 12, 15
10
12, 22
13, 14
17, 18, 19, 20, 21
2, 23
19. Circulation pump drive belt slipping
20. Defective impeller
21. Defective/incorrect thermostat
22. Lubricating oil level too high
23. Generator drive belt slipping
24. Stored diagnostic trouble codes
(DTCs)*