Engine coolant temperature signalled by instrument too low
- Make
- Fiat
- Model
- Doblò Factory Service Manual
- Year
- 2000–2010
- Section
- Instrument panel › Engine coolant temperature signalled by instrument too low
‹ Prev Engine coolant overheating warning light not workingNext › Minimum engine oil pressure warning light not working
Fault diagnosisEngine coolant temperature signalled by instrument too low
ENGINE COOLANT TEMPERATURE SIGNALLED BY INSTRUMENT TOO LOW
| Results of the tests | ||||
| 1 | CHECK PARAMETER IS CONSISTENT | All OK | Problems met | Operation |
|---|---|---|---|---|
Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket Use a tester to check the temperature shown on the instrument is consistent with the parameter recorded by the injection control unit | Continue to Step 3 | Incoherent parameters | Continue to Step 2 | |
| 2 | CHECK INSTRUMENT PANEL ELECTRICAL CIRCUIT | All OK | Problems met | Operation |
| Check instrument panel power supply and earth in order See E4010 INSTRUMENT PANEL | Continue to Step 4 | Panel defective | Replace the panel Op. 5560B11 | |
| 3 | TEMPERATURE SENSOR ELECTRICAL CIRCUIT CHECK | All OK | Problems met | Operation |
| 1.2 8v | Check coolant temperature sensor power supply and earth in order See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT | Continue to Step 4 | Sensor defective | Replace the temperature sensor Op. 1056B50 |
| Connections not correct | Restore connections See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT | |||
| 1.9 DIESEL | Check coolant temperature sensor power supply and earth in order See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT | Continue to Step 4 | Sensor defective | Replace the temperature sensor Op. 1060D14 |
| Connections not correct | Restore connections See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT | |||
| 4 | CHECK ON CORRECT OPERATION | All OK | Problems met | Operation |
| 1.2 8v | Check that the fault is no longer present | The fault persists: control unit defective | Replace control unit Op. 1056B82 Search for the fault starting from another symptom' | |
| 1.9 DIESEL | Check that the fault is no longer present | The fault persists: control unit defective | Replace control unit Op. 1060D80 Search for the fault starting from another symptom' | |
‹ Prev Engine coolant overheating warning light not workingNext › Minimum engine oil pressure warning light not working
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