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Fiat Grande Punto Factory Service Manual (2005-2012)22 · Fault diagnosis
22 · Diagnostics

Electric fan stays on all the time

Make
Fiat
Model
Grande Punto Factory Service Manual
Year
2005–2012
Section
Engine › Electric fan stays on all the time
Fault diagnosisElectric fan stays on all the time

ELECTRIC FAN STAYS ON ALL THE TIME

1.2 8v, 1.4 8v, 1.3 Multijet, 1.9 Multijet

The cooling fan comes on and remains on even when the engine is cold.

Results of the tests
1CHECK USING DIAGNOSTIC EQUIPMENTAll OKProblems encounteredOperation

Connect the diagnostic test equipment (Examiner or other instruments) to the tester input.

Check:

- That there are no faults in the engine management control unit;

- The plausibility of all the parameters

Move on to Step 2Error detected in the control unitContinue following the instructions for the diagnostic equipment
2FAN OPERATING CIRCUIT CHECKAll OKProblems encounteredOperation

For the 1.2 8v, 1.4 8v;

Check the following, in order:

- Engine temperature sensor

See Test 1060OE ENGINE COOLANT TEMPERATURE SENSOR OPERATION CHECK

- Fan engagement relay;

- Connection between engine management control unit and fan relay;

- Connection between relay and fan

See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT

End of diagnosis

1. Sensor defective

2. Connections not correct

3. Component defective

4. Engine management control unit faulty

1. Replace the temperature sensor

2. Repair the connections

3. Replace the component involved (in the case of a fuse, find out what caused it to blow).

4. Check the control unit thoroughly (using the diagnostic equipment - Examiner or other instruments) and, if necessary, replace the engine management control unit

2FAN OPERATING CIRCUIT CHECKAll OKProblems encounteredOperation

For the 1.3 JTD 16v 75 Cv, 1.3 JTD 16v 90 Cv, 1.9 JTD 8v;

Check the following, in order:

- Engine temperature sensor

See Test 1060OE ENGINE COOLANT TEMPERATURE SENSOR OPERATION CHECK

- Fan engagement relay;

- Connection between engine management control unit and fan relay;

- Connection between relay and fan

See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT

End of diagnosis

1. Sensor defective

2. Connections not correct

3. Component defective

4. Engine management control unit faulty

1. Replace the temperature sensor

Op. 1060G14 ENGINE COOLANT TEMPERATURE SENSOR - R.R.

2. Repair the connections

3. Replace the component involved (in the case of a fuse, find out what caused it to blow).

4. Check the control unit thoroughly (using the diagnostic equipment - Examiner or other instruments) and, if necessary, replace the engine management control unit

Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - .R

Parts & tools for this job For 2005 Fiat Grande Punto

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