IMPORTANT!

Symptoms and possible causes

The diagnosis button lamp flashes Please refere to Diagnostic Function

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 15, 22

Too low lubrication oil pressure 16

Excessive coolant temperature 17, 18, 19, 20, 28

Too low coolant temperature 20

No, or poor charge 2, 23

Too high exhaust temperature TWD1643GE, TWD1652/53

13, 17, 18, 19, 21, 25, 27, 28, 29, 30

1 Discharged batteries

2 Poor contact/open circuit in electrical wiring

3 Main switch turned off

4 Main fuse 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 fuel fine-filter/pre-filter (due to contaminations, or stratification in the fuel at low temperature) 10 Air in the fuel system

11 Water/contamination in fuel 12 Faulty fuel injectors

13 In sufficient air supply to the engine:

– blocked air filter

– air leakage between the turbo and the engine's intake manifold

– dirty compressor part in the turbocharger

– faulty turbo compressor

– poor engine room ventilation 14 Coolant temperature too high 15 Coolant temperature too low 16 Oil level too low

17 Coolant level too low

18 Air in the coolant system 19 Faulty circulation pump 20 Defective thermostat

21 Blocked charge air cooler 22 Oil level too high

23 Alternator drive belt slips 24 Water entry into engine

25 High back pressure in the exhaust system 26 Break in ”Pot+” cable to throttle

27 High temperature, charge air cooler 28 Blocked radiator

29 No pressure in cooling system 30 Check wastegate function