198001698 - D012 ENGINE IDLING TOO LOW

The customer complains that: Engine idle speed is too low

1	MODE PARAMETERS CHECK	All OK	Problems encountered	Operation
	Connect using the Examiner in the engine control unit.Check the value of the following parameters:Battery voltageAccelerator pedalAccelerator position 1 AD/CAccelerator position 2 AD/C	Move on to Step 2	Battery voltage low	Recharge/replace battery
			Accelerator pedal potentiometers defective	Replace the accelerator pedal    Op. 1068A20 ACCELERATOR PEDAL WITH BUILT-IN POTENTIOMETER - R.R
2	MOTORIZED THROTTLE CHECK	All OK	Problems encountered	Operation
	- Check that the motorized throttle is working properly, carrying out the    See Test 1056BW Check on the throttle body actuator operation	Move on to Step 3	Motorized throttle defective	Replace the motorized throttle    Op. 1056B14 THROTTLE CASE - R + R
			Wiring defective	Restore correct wiring.
3	CYLINDER COMPRESSION CHECK	All OK	Problems encountered	Operation
	Carry out the cylinder compression check    Op. 0520G15 COMPRESSION TEST - CHECK WITH EXAMINER WITH SPARK PLUGS/INJECTORS REMOVED	Move on to Step 4	Cylinder compression insufficient	Move on to Step 5
4	CHECK THE CAUSE OF THE INSUFFICIENT COMPRESSION	All OK	Problems encountered	Operation
	Carry out    Op. 1016C10 SINGLE CYLINDER HEAD - R.R. AND REPLACE GASKET to check the valve seal and the condition of the cylinders/piston rings	Move on to Step 5	Valve seal insufficient	Overhaul the cylinder head [PR_1016E10]    Op. 1016E10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL
5	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. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R