2751026 - D10 ENGINE IDLE IRREGULAR

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Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation

Preliminarily check:

  • the state of the spark plugs and leads;
  • the condition of the air filter
  • the condition of the air intake circuit
Continue to Step 1Spark plugs dirty or defectiveReplace the spark plugs Op. 5510D10
Leads defectiveReplace the spark plug leads Op. 5510D14
Air filter blockedReplace the filter element Op.   1048A14 
Air filter blockedRestore the correct operation of the intake circuit
1CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket.

check

  • that there are no faults in the engine management control unit;
  • plausibility of all the parameters
Continue to Step 2'Supply system' error detectedCoolant leaks detected See table   Z50 
Another error dectected in the control unitContinue following the instructions for the diagnostic equipment
Inconsistent parameterContinue following the instructions for the diagnostic equipment
2IDLE ACTUATOR CHECKAll OKProblems metOperation
Check that the system carries out the correct idle learning procedureContinue to Step 3Irregular idlingCarry out the idle learning procedure correctly
3PETROL VAPOUR RECOVERY SYSTEM CHECKAll OKProblems metOperation
Check the condition and seal of the petrol vapour recovery pipes Continue to Step 4Air seepageRestore the correct seal
Pipe from canister to solenoid brokenReplace the pipe
4PETROL VAPOUR RECOVERY SOLENOID VALVE CHECKAll OKProblems metOperation
Carry out active diagnosis of solenoid See Test   5510CC  Check that the ignition coils are working Continue to Step 6Solenoid not workingContinue to Step 5
5SOLENOID VALVE ELECTRICAL CIRCUIT CHECKAll OKProblems metOperation
Check supply and earth of petrol vapour recovery solenoidContinue to Step 6Solenoid valve faultyReplace the solenoid valve Op.   1080E28 
Solenoid valve faultyRestore the connections
6BRAKE SERVO AND PIPE CHECKAll OKProblems metOperation

Check condition of:

Continue to Step 7Brake servo pipe defectiveReplace the pipe
Brake servo defectiveReplace the brake servo/pump assembly Op.   3330D02 
7CHECK ON FUEL PRESSUREAll OKProblems metOperation
Check the fuel supply pressure Op.   0510C10  Continue to Step 8Insufficient fuel pressure: pipe obstructedEliminate the blockage; if necessary replace the pipe
Low fuel pressure: clogged filterReplace the pump assembly Op.   1040A70 
Insufficient fuel pressure: regulator out of calibrationReplace the pump assembly Op.   1040A70 
Low fuel pressure: defective pumpReplace the pump assembly Op.   1040A70 
8CHECK ON TIMINGAll OKProblems metOperation
Check that the timing is correct Op.   0510A20  Continue to Step 9Timing not correctRestore the correct timing
9Continue as instructed by the testerAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persists: control unit faultyReplace control unit Op.   1056B82