3233015 - D02 ENGINE NOT RUNNING SMOOTHLY / (LOSING POWER)

Under conditions of constant load and speed, there are intermittent decreases in performance, even prolonged
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation

Check, in order:

  • that there are no leaks from the fuel system
  • the condition of the air intake circuit
  • the correct operation of the exhaust system;
  • that there is no water in the diesel filter
 Continue to Step 1 Fuel leaksRestore the correct seal for the pipes, if necessary, replace them
Fault in air intake circuitRepair the air intake circuit
Obstruction in the exhaust systemReplace the damaged system component
Water in diesel filterClean the tank and replace the filter
1CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Connect the diagnostic equipment to the diagnostic socket.

Check:

  • for errors in the control unit
  • plausibility of all the parameters
 Continue to Step 2 An error is detected in the control unitContinue following the instructions for the diagnostic equipment
unreliable parametersContinue following the instructions for the diagnostic equipment
2ROAD TEST WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Road test the vehicle keeping the diagnostic instrument connected.
Make sure that the conditions in which the problem occurs are reproduced

Check:

  • for errors in the control unit
  • plausibility of all the parameters
 Continue to Step 3 Errors suddenly occur in the control unitContinue following the instructions for the diagnostic equipment
Parameters off scaleContinue following the instructions for the diagnostic equipment
3CHECK ON BRAKE PEDAL SWITCHAll OKProblems metOperation
Check that the pedal switch is working properly See   E5050  DIESEL ENGINES ELECTRONIC MANAGEMENT Continue to Step 4 Brake pedal does not returnEliminate the cause of the sticking
Switch faulty Replace the switch
Wiring short-circuit (intermittent) Restore connection See   E5050  DIESEL ENGINES ELECTRONIC MANAGEMENT
4CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsSearch for the fault starting from another symptom