199002958 - D010 ENGINE IDLE IRREGULAR

The engine idle speed is not correct or the engine does not stick to the idle speed

		Test results
0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
	First, check:-leaks from the manifold gasket;-leaks from the throttle body;-leaks from the cylinder head.	Move on to Step 1	Leaks from the manifold gasket	Restore the correct gasket.
			Leaks from the throttle body gasket	Restore the correct gasket.
			Leaks from the cylinder head	Eliminate the leak
1	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket and check:- no faults in the engine management control unit;- parameter plausibility	Move on to Step 2	Error detected in the control unit	Continue following the instructions on the diagnostic equipment
			Parameter not consistent	Continue following the instructions on the diagnostic equipment
2	PETROL VAPOUR RECOVERY SOLENOID CHECK	All OK	Problems encountered	Operation
	Carry out the active diagnosis of the solenoid valve	Move on to Step 4	Solenoid not working	Move on to Step 3
3	VAPOUR SOLENOID ELECTRICAL CIRCUIT CHECK	All OK	Problems encountered	Operation
	Check the wiring between the valve and the engine compartment control unitCheck the wiring between the valve and the control unit    See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT	Move on to Step 4	Solenoid faulty	Replace the solenoid valve    Op. 1080E28 ENABLEMENT SOLENOID FOR FLOW OF FUEL VAPOUR TO INLET - R+R
			Connections not correct	Restore the correct connections    See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
4	IGNITION SYSTEM CHECK	All OK	Problems encountered	Operation
	Inspect the spark plugs and check that they are working properlyCheck that the coils are working by carrying out    See Test 5510CI IGNITION COIL OPERATION CHECK	Move on to Step 5	Spark plugs defective	Replace spark plugs    Op. 5510D10 SPARK PLUGS - R+R
			Coil defective	Replace coil    Op. 5510C14 IGNITION COIL/S - R.R.
5	FUEL PRESSURE CHECK	All OK	Problems encountered	Operation
	Check the fuel supply pressure by performing the    See Test 1056BI FUEL SYSTEM RETURN PRESSURE CHECK    See Test 1056BY FUEL SYSTEM SUPPLY PRESSURE CHECK	Move on to Step 6	Fuel pressure too low: pipe obstructed	Eliminate the obstructions; if necessary, replace the pipe
			Fuel pressure too low: pump defective	Replace the pump assembly    Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R
6	ENGINE COOLANT TEMPERATURE CHECK	All OK	Problems encountered	Operation
	Check that the engine temperature sensor is working correctly by carrying out the    See Test 1056BC Engine coolant temperature sensor operation check	Move on to Step 7	Engine overheating	Restore the engine cooling system    See E5020 ENGINE COOLING
			Engine temperature sensor defective	Replace the engine temperature sensor    Op. 1056B50 ENGINE COOLANT TEMPERATURE SENSOR - R + R
7	INJECTOR CHECK	All OK	Problems encountered	Operation
	Check that the injectors are operating correctly by carrying out    See Test 1056BA INJECTOR OPERATION CHECK	Move on to Step 8	Injector stuck/incorrectly adjusted	Replace the injector    Op. 1056B70 INJECTOR (ONE) - R + R WITH FUEL MANIFOLD PIPE REMOVED - INCLUDES SEAL REPLACEMNT
			Connections not correct	Restore the correct connections    See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
8	ACCELERATOR PEDAL CHECK	All OK	Problems encountered	Operation
	Check that the accelerator pedal is working correctly.	Move on to Step 9	Accelerator pedal potentiometer defective	Replace the accelerator pedal    Op. 1068A20 ACCELERATOR PEDAL WITH BUILT-IN POTENTIOMETER - R.R
			Connections not correct	Restore the correct connections    See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
9	CHECK THE OPERATION OF THE MOTORIZED THROTTLE	All OK	Problems encountered	Operation
	Check the condition of the motorized throttle actuator connectionCheck the condition of the wiringCheck that the motorized throttle is working properly, carrying out    See Test 1056BW Check on the throttle body actuator operation	Move on to Step 10	Connection defective	Restore correct connection.
			Wiring defective	Restore the correct wiring.
			Motorized throttle defective	Replace the motorized throttle    Op. 1056B14 THROTTLE CASE - R + R
10	CYLINDER COMPRESSION CHECK	All OK	Problems encountered	Operation
	Check that the cylinder compression is not too low    Op. 0520G15 COMPRESSION TEST - CHECK WITH EXAMINER WITH SPARK PLUGS/INJECTORS REMOVED	Move on to Step 11	Compression too low	Overhaul the engine
11	ENGINE CONTROL UNIT OPERATION CHECK	All OK	Problems encountered	Operation
	Check that the engine control unit is working properly	End of diagnosis	Control unit defective.	Replace the engine management control unit    Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R