198001698 - D012 ENGINE IDLING TOO LOW

The customer complains that: Engine idle speed is too low

		Test results
1	MODE PARAMETERS CHECK	All OK	Problems encountered	Operation
	Connect using the Examiner in the engine management control unit and 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    See Test 1056BW Check on the throttle body actuator operationCheck the continuity of the wiring between the engine control unit and the motorized throttle	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 5	Cylinder compression insufficient	Move on to Step 4
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    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	The fault persists	Replace the engine management control unit    Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R