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Fiat Ulysse Factory Service Manual (2002-2010)22 · Fault diagnosis
22 · Diagnostics

Engine not running smoothly / (irregular operation)

Make
Fiat
Model
Ulysse Factory Service Manual
Year
2002–2010
Section
Engine › Engine not running smoothly / (irregular operation)
Fault diagnosisEngine not running smoothly / (irregular operation)

ENGINE NOT RUNNING SMOOTHLY / (IRREGULAR OPERATION)

2.0 16V JTD, 2.2 16V JTD

STEPOPERATIONS TO BE CARRIED OUTTEST RESULTS
0PRELIMINARY CHECKSALL OKPROBLEMS ENCOUNTEREDACTION

Check the following, in order:

  • condition of the air intake circuit;
  • that there are no faults in the air filter
  • the seal of the diesel pipes
  • correct exhaust system operation;
  • no water, petrol, paraffin or dirt in the fuel tank and fuel filter
  • battery earth terminal fastening
Move on to Step1. Fault in the air intake circuit1. Renew the air intake circuit
2. Air filter blocked2. Replace the filter element
3. Leaks from diesel pipes3. Eliminate the leaks
4. Obstruction in exhaust system4. Replace the damaged exhaust system component
5. Water, petrol, paraffin or dirt found to be present.5. Clean the tank and pipes and replace the filter element
6. Battery earth terminal insecure6. Restore the correct earth lead fastening
1CHECK USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION

Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket.Check:

  • that there are no errors in the control unit;
  • parameter plausibility
Move on to Step1. Error detected in the control unit1. Continue following the instructions for the diagnostic equipment
2. Parameters not plausible2. Continue following the instructions for the diagnostic equipment
2ROAD TEST USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION

Carry out a road test reproducing the conditions in which the fault occurs, keeping the diagnostic equipment connected.Check:

  • that there are no errors in the control unit;
  • parameter plausibility
Move on to Step1. Error detected in the control unit1. Continue following the instructions for the diagnostic equipment
2. Parameters not plausible2. Continue following the instructions for the diagnostic equipment
3. No communication with the control unit3. Restore the connection between the engine management control unit and the diagnostic connector
3CHECK ON CORRECT OPERATIONALL OKPROBLEMS ENCOUNTEREDACTION
Check that the fault is no longer present1. Fault persists control unit defective1. Replace the control unit

Parts & tools for this job Staging For 2002 Fiat Ulysse

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