312000559 - D010 ENGINE IDLE IRREGULAR

The engine idle speed is not correct or the engine does not stick to the idle speed
Test results
0PRELIMINARY CHECKSAll OKProblems encounteredOperation

First, check:

  • eaks from the manifold gasket;
  • leaks from the throttle body;
  • leaks from the cylinder head.
Move on to Step 11. Leaks from the manifold gasket2. Leaks from the throttle body gasket3. Leaks from the cylinder head1. Restore the gasket2. Restore the gasket3. Eliminate the leak
1CHECK USING DIAGNOSTIC EQUIPMENTAll OKProblems encounteredOperation

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 21. Error detected in the control unit2. Parameter not consistent1. Continue following the instructions on the diagnostic equipment2. Continue following the instructions on the diagnostic equipment
2PETROL VAPOUR RECOVERY SOLENOID CHECKAll OKProblems encounteredOperation
Carry out the active diagnosis of the solenoid valveMove on to Step 3Solenoid not workingMove on to Step 3
3VAPOUR SOLENOID ELECTRICAL CIRCUIT CHECKAll OKProblems encounteredOperation
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 41. Solenoid faulty2. Connections not correct1. Replace the solenoid valve    Op. 1080E28 ENABLEMENT SOLENOID FOR FLOW OF FUEL VAPOUR TO INLET - R+R 2. Restore the correct connections    See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
4PHASE TRANSFORMER CHECKAll OKProblems encounteredOperation
Connect using the Examiner to the engine control unit and check that the phase transformer is working properly in active diagnosisCheck correct operation of the phase transformer by carrying out theSee Test and theSee Test Move on to Step 51. Transformer defective2. Transformer solenoid defective3. Wiring from engine control unit to transformer broken1. Replace variable valve timing    Op. 1036B39 PHASE TRANSFORMER ON CAMSHAFT IN CYLINDER HEAD - R.R.2. Replace transformer solenoid    Op. 1056B48 PHASE TRANSFORMER ELECTROMAGNET - R.R.3. Restore correct wiring.
5IGNITION SYSTEM CHECKAll OKProblems encounteredOperation
Inspect the spark plugs and check that they are working properlyCheck that the coils are working properly by carrying out the    See Test 5510CE IGNITION CONTROL SIGNAL CHECK, the    See Test 5510CI IGNITION COIL OPERATION CHECKand the    See Test 5510OA IGNITION COIL RESISTANCE CHECKMove on to Step 61. Spark plugs defective2. Coil defective1. Replace spark plugs    Op. 5510D10 SPARK PLUGS - R+R2. Replace coil    Op. 5510C14 IGNITION COIL/S - R.R.
6FUEL PRESSURE CHECKAll OKProblems encounteredOperation
Check the fuel supply pressure is correct by carrying out the    See Test 1056BY FUEL SYSTEM SUPPLY PRESSURE CHECKMove on to Step 71. Fuel pressure too low: pipe obstructed2. Fuel pressure too low: pump defective1. Eliminate the obstructions; if necessary, replace the pipe2. Replace the pump assembly    Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R
7ENGINE TEMPERATURE CHECKAll OKProblems encounteredOperation
Check that the engine temperature sensor is working correctly by carrying out the    See Test 1056BC ENGINE COOLANT TEMPERATURE SENSOR OPERATION CHECKMove on to Step 81. Engine overheating2. Engine temperature sensor defective1. Restore the engine cooling system    See E5020 ENGINE COOLING 2. Replace the engine temperature sensorOp. 1056B50
8INJECTOR CHECKAll OKProblems encounteredOperation
Check that the injectors are operating correctly by carrying out    See Test 1056BA INJECTOR OPERATION CHECKMove on to Step 91. Injector stuck/incorrectly adjusted2. Connections not correct1. Replace the injector    Op. 1056B70 INJECTOR (ONE) - R + R WITH FUEL MANIFOLD PIPE REMOVED - INCLUDES SEAL REPLACEMNT 2. Restore the correct connections    See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
9ACCELERATOR PEDAL CHECKAll OKProblems encounteredOperation
Check that the accelerator pedal is working correctly.Move on to Step 101. Accelerator pedal potentiometer defective2. Connections not correct1. Replace the accelerator pedalOp. 1068A14 2. Restore the correct connections    See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
10CHECK THE OPERATION OF THE MOTORIZED THROTTLEAll OKProblems encounteredOperation
Check the condition of the motorized throttle actuator connectionCheck the condition of the wiringCheck that the motorized throttle is working properly    See Test 1056BW THROTTLE BODY ACTUATOR OPERATION CHECKMove on to Step 111. Connection defective2. Wiring defective3. Motorized throttle defective1. Restore correct connection.2. Restore the correct wiring.3. Replace the motorized throttleOp. 1056B14
11LAMBDA SENSOR CHECKAll OKProblems encounteredOperation
Check that the upstream Lambda sensor is working properly by performing the    See Test 1080BA UPSTREAM LAMBDA SENSOR OPERATION CHECKCheck that the downstream Lambda sensor is working properly by performing the    See Test 1080BD DOWNSTREAM LAMBDA SENSOR OPERATION CHECKMove on to Step 121. Upstream lambda sensor defective2. Downstream Lambda sensor defective3. Upstream sensor wiring defective4. Downstream sensor wiring defective1. Replace the upstream sensor    Op. 1080B94 FRONT LAMBDA SENSOR TO WITH CATALYTIC CONVERTER - R.R 2. Replace the downstream sensor    Op. 1080B95 REAR LAMBDA SENSOR TO CATALYTIC CONVERTER - R.R 3. Restore correct wiring.4. Restore correct wiring.
12AIR/TEMPERATURE PRESSURE SENSOR CHECKAll OKProblems encounteredOperation
Check the continuity of the wiring between the sensor and the engine control unitCheck that the sensor is working properly by carrying out the    See Test 1056BU ASPIRATED AIR TEMPERATURE SENSOR OPERATION CHECK Move on to Step 131. Wiring broken2. Sensor defective1. Restore the correct wiring.2. Replace the sensor    Op. 1056B54 INTAKE AIR PRESSURE/TEMPERATURE SENSOR - R.R.
13CYLINDER COMPRESSION CHECKAll OKProblems encounteredOperation
Check that the cylinder compression is not too lowOp. 0520G15 Move on to Step 14Compression too lowOverhaul the engine
14ENGINE CONTROL UNIT OPERATION CHECKAll OKProblems encounteredOperation
Check that the engine control unit is working properly.End of diagnosisControl unit defectiveReplace the engine management control unit    Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R