Workshop Manuals Factory service & repair Alfa Romeo
Alfa Romeo 147 Factory Service Manual (2000-2002)18 · Fault diagnosis
18 · Diagnostics

K25 Engine coolant fluid temperature gauge not working

Make
Alfa Romeo
Model
147 Factory Service Manual
Year
2000–2002
Section
Instruments › K25 Engine coolant fluid temperature gauge not working
Fault diagnosisK25 Engine coolant fluid temperature gauge not working

K25 Engine coolant fluid temperature gauge not working

StepTest procedureResultAction
1CHECK WITH DIAGNOSTIC EQUIPMENT

Connect the Examiner to the diagnostic connection

Verify:

  • that there are no faults in the instrument pane;
  • that there are no faults in the i.e. control unit
OK

Move onto step 2

for faults in the control panel for faults in the i.e. control unit
  • Continue as instructed by the tester

End of diagnosis

2CHECKING WITH DIAGNOSTIC EQUIPMENT

Connector the Examiner to the diagnostic socket

Check indicator operation while in active diagnosis mode

OK

Move onto step 3

Indicator not working

End of diagnosis

3CHECKING COOLANT TEMPERATURE SENSOR

Check that the engine coolant temperature sensor is working:

OK

Move onto step 4

Sensor not working

End of diagnosis

4CHECK ELECTRICAL CIRCUIT

Check continuity/insulation of wiring between engine temperature sensor and i.e. control unit Wiring diagram E5030 PETROL ENGINES ELECTRONIC CONTROL

OK

Move onto step 5

Wires broken/not insulated
  • Restore correct wiring operation

End of diagnosis

5CHECKING CORRECT OPERATION

Check that the fault is no longer present

OK

Incorrect selection of diagnostic procedure

Probable i.e. control unit fault
  • Replace i.e. control unit

Incorrect selection of diagnostic procedure

Parts & tools for this job For 2000 Alfa Romeo 147

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