199002960 - D012 ENGINE IDLING TOO LOW

The customer complains that: Engine idle speed is too low
Test results
1MODE PARAMETERS CHECKAll OKProblems encounteredOperation
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/CMove on to Step 2Battery voltage lowRecharge/replace battery
Accelerator pedal potentiometers defectiveReplace the accelerator pedal    Op. 1068A20 ACCELERATOR PEDAL WITH BUILT-IN POTENTIOMETER - R.R
2MOTORIZED THROTTLE CHECKAll OKProblems encounteredOperation
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 throttleMove on to Step 3Motorized throttle defectiveReplace the motorized throttle    Op. 1056B14 THROTTLE CASE - R + R
Wiring defectiveRestore correct wiring.
3CYLINDER COMPRESSION CHECKAll OKProblems encounteredOperation
Carry out the cylinder compression check    Op. 0520G15 COMPRESSION TEST - CHECK WITH EXAMINER WITH SPARK PLUGS/INJECTORS REMOVEDMove on to Step 5Cylinder compression insufficientMove on to Step 4
4CHECK THE CAUSE OF THE INSUFFICIENT COMPRESSIONAll OKProblems encounteredOperation
Carry out    Op. 1016C10 SINGLE CYLINDER HEAD - R.R. AND REPLACE GASKET to check the valve seal and the condition of the cylinders/piston ringsMove on to Step 5Valve seal insufficientOverhaul the cylinder head    Op. 1016E10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL
5CORRECT OPERATION CHECKAll OKProblems encounteredOperation
Check that the fault is no longer presentEnd of diagnosisThe fault persistsReplace the engine management control unit    Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R