939004391 - S003 ENGINE KNOCKING

The customer complains of: Irregular combustion noise, engine knock

		Results of the tests
0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
	Check that the engine oil level is correct    Op. 0010T11 ENGINE OIL - CHECK LEVEL AND TOP UP, IF NECESSARY Check that the air intake/vacuum circuit is working properly by carrying out the    See Test 1048OA AIR INTAKE/VACUUM CIRCUIT CHECKCheck the condition of the fuel supply circuit and make sure that it is working properly carrying out the    See Test 1040OA FUEL SUPPLY CIRCUIT CHECKCheck the operation of the low pressure supply circuit by carrying out the    See Test 1060OB CHECK ON SUPPLY LOW PRESSURE FUEL CIRCUIT	Move on to Step 1	Oil level incorrect	Restore the correct engine oil level    Op. 0010T11 ENGINE OIL - CHECK LEVEL AND TOP UP, IF NECESSARY
1	AMBIENT PARAMETERS CHECK	All OK	Problems encountered	Operation
	Select the following control unit at the diagnostic equipment: EDC16C39 Diesel electronic injection control unit.Check the value of the following parameters:. Battery voltage    See Test 5530BB BATTERY VOLTAGE CHECK. Atmospheric pressure    See Test 1060GD ATMOSPHERIC PRESSURE CHECK. Air temperature in the intake manifold    See Test 1064BD SUPERCHARGING TEMPERATURE CHECK. Supercharging pressure Objective. Supercharging pressure Measured    See Test 1060GF SUPERCHARGING PRESSURE CHECK. Measured air mass    See Test 1060GG MEASURED AIR MASS CHECK. Engine coolant temperature    See Test 1060OE CHECK ON OPERATION OF COOLANT TEMPERATURE SENSOR. Diesel temperature    See Test 1060EA DIESEL FUEL TEMPERATURE CHECK. Objective Diesel pressure. Measured Diesel pressure    See Test 1060GH DIESEL FUEL PRESSURE CHECK. Engine rpm    See Test 1060GI ENGINE SPEED CHECK	Move on to Step 2
2	PREHEATING RELAY ACTIVE DIAGNOSIS	All OK	Problems encountered	Operation
	Carry out the active diagnosis for the preheating relay, checking that the result is positive. The check on the following system is only necessary if the outside temperature is below 0 °C.	End of diagnosis	The result of the active diagnosis is negative	Move on to Step 3
3	HEATER PLUGS CHECK	All OK	Problems encountered	Operation
	Check that the heater plugs are working properly    See Test 5520CA GLOW PLUGS FUNCTIONAL TEST	End of diagnosis