D005 ENGINE DOES NOT PRODUCE BEST PERFORMANCE - Fiat - GRANDE PUNTO - eLearn

199002956 - D005 ENGINE DOES NOT PRODUCE BEST PERFORMANCE

The customer complains that: Reduced engine performance in all operating conditions

0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
		Test results
	Select the following control unit at the diagnostic equipment: Marelli Diesel Injection 6F3 EOBD CAN (EP engine 1.3 JTD). Check the value of the following parameters:· Battery voltage See Test 5530BB BATTERY VOLTAGE CHECK	Move on to Step 1
1	CONFIGURATION TESTS	All OK	Problems encountered	Operation
	Select the following control unit at the diagnostic equipment: Marelli Diesel Injection 6F3 EOBD CAN (EP engine 1.3 JTD).Check in the Configurations section whether the replacement of any of the following components is followed by their subsequent configuration:- injectorIn this case, carry out the configuration, checking that the outcome is positive	Move on to Step 4	The outcome of the configuration is not positive	Move on to Step 2
2	ERROR CHECK	All OK	Problems encountered	Operation
	Check whether any of the following errors are present using the diagnostic equipment:- P1301- U0001- U0426- U1700	Move on to Step 4	1. Error P1301 is present2. Error U0001 is present3. Error U0426 is present4. Error U1700 is present	1. Move on to Step 32. Continue as indicated See table U0001 CAN line error3. Memorise the CODE. If it is not possible, replace the engine control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R 4. Continue as indicated See table U1700 CAN network (NCM - NBC)
3	IMA CLASSIFICATION	All OK	Problems encountered	Operation
	In the Configurations section on the diagnostic tester, rerun the IMA classification and ensure it is successful	End of diagnosis	The classification is unsuccessful	Replace the engine management control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R
4	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
	Check that the air intake/vacuum circuit is working properly See Test 1048OA AIR INTAKE/VACUUM CIRCUIT CHECKCheck the condition of the fuel supply circuit and make sure that it is working properly See Test 1040OA FUEL SUPPLY CIRCUIT CHECK	Move on to Step 5
5	MODE PARAMETERS CHECK	All OK	Problems encountered	Operation
	Select the following control unit at the diagnostic equipment: Marelli Diesel Injection 6F3 EOBD CAN (EP engine 1.3 JTD).Check the value of the following parameters:- Accelerator position 1 AD/C- Accelerator 2 position AD/C See Test 1068AC ACCELERATOR PEDAL CHECKS- Coolant temperature See Test 1060OE ENGINE COOLANT TEMPERATURE SENSOR OPERATION CHECK- Diesel temperature See Test 1060EA DIESEL TEMPERATURE CHECK. Atmospheric pressure See Test 1060GD ATMOSPHERIC PRESSURE CHECK- Measured Diesel pressure See Test 1060GH DIESEL PRESSURE CHECK- Pressure regulator opening (MPROP) See Test 1060GR CHECK OPERATION OF FUEL PRESSURE SENSOR ON RAIL- Engine rpm See Test 1060GI CHECK ENGINE SPEED	Move on to Step 6
6	HIGH PRESSURE CHECK	All OK	Problems encountered	Operation
	Connect the diagnostic equipment to the diagnostic socket.Check that the diesel pressure parameter is correct See Test 1060OD HIGH PRESSURE FUEL CIRCUIT CHECK	Move on to Step 12	Pressure not correct	Move on to Step 7
7	LOW RETURN PRESSURE CHECK	All OK	Problems encountered	Operation
	that the pressure in the return pipe to the tank is less than 1 bar See Test 1060OA LOW FUEL RETURN PRESSURE CIRCUIT CHECK	Move on to Step 8	Pressure above the maximum limit: return pipe to the tank obstructed	Repair the pipe and replace if necessary
8	LOW SUPPLY PRESSURE CHECK	All OK	Problems encountered	Operation
	Check that the difference in pressure upstream and downstream of the filter is less than 1 bar	Move on to Step 9	Difference in pressure more than 1 bar	Replace the fuel filter cartridge Op. 1044B10 FUEL FILTER ASSEMBLY - R + R OR REPLACE
9	LOW SUPPLY PRESSURE CHECK	All OK	Problems encountered	Operation
	Check that the supply pump pressure at the filter inlet is more than 2.2 bar (75 bhp) or 4.5 bar (90 bhp)	Move on to Step 12	Pressure lower than 2 bars (75 bhp) or 4.5 bars (90 bhp)	Move on to Step 10
10	LOW SUPPLY PRESSURE CHECK	All OK	Problems encountered	Operation
	Measure the difference in pressure between the electrical pump outlet and the filter inlet, checking that it is less than 0.3 bar	Move on to Step 11	Difference in pressure more than 0.3 bar	Replace the pipe
11	LOW SUPPLY PRESSURE CHECK	All OK	Problems encountered	Operation
	Check that the pump supply voltage is equal to 12V and that the current uptake is between 2 and 10 A See Test 1040AA CHECK ON SUPPLY VOLTAGE AND CURRENT UPTAKE	Move on to Step 12	1. Voltage lower than 12 V2. Current greater than 10 A: pump defective3. Current less than 2 A: pump obstructed	1. Check electrical wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT 2. Replace the fuel pump Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R 3. Replace the fuel pump and clean the fuel tank Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R
12	CORRECT OPERATION CHECK	All OK	Problems encountered	Operation
	Replace the high pressure pump and check that the fault is no longer present Op. 1060E10 DIESEL INJECTION PRESSURE PUMP - R.R.	End of diagnosis	Fault persists	Move on to Step 13
13	CYLINDER COMPRESSION CHECK	All OK	Problems encountered	Operation
	Carry out the cylinder compression check Op. 0510A10 CYLINDER COMPRESSION - CHECK FOR LOOSE SPARK PLUGS OR INJECTORS	Move on to Step 15	Cylinder compression insufficient	Move on to Step 14
14	CHECK ON CAUSE OF INSUFFICIENT COMPRESSION	All OK	Problems encountered	Operation
	Check the valve seal. Op. 1016C10 SINGLE CYLINDER HEAD - R.R. AND REPLACE GASKET Check condition of cylinders/piston rings	Move on to Step 15	1. Valve seal insufficient2. Cylinders/piston rings worn	1. Overhaul the head Op. 1016E10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL 2. Restore the seal
15	CORRECT OPERATION CHECK	All OK	Problems encountered	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Replace the engine management control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R