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Fiat Seicento Factory Service Manual (1998-2010)12 · Diagnosis
12 · Diagnostics

Diagnosis table

Make
Fiat
Model
Seicento Factory Service Manual
Year
1998–2010
Section
On-board instruments › Diagnosis table
DiagnosisDiagnosis table

Diagnosis table

K26 Engine coolant gauge does not work

With the key at MAR, the engine coolant gauge does not light up when the engine is hot.

Step Validity Operation to be performed Test results
OK ⚠ 🔧
1 CHECK SIGNAL Check whether the signal (earth) indicating excessive engine coolant temperature reaches the instrument panel correctly
(Wiring diagram: E4010 "Instruments")		 All OK
Go to Step 2		 Problems found
Signal does not reach instrument		 Intervention
Go to Step 4
2 CHECK WARNING LIGHT Check engine coolant gauge warning light intactness. All OK
Go to Step 3		 Problems found
Faulty warning light		 Intervention
Replace warning light in the central instrument
PROCEDURE OP. 5560B20
3 CHECK CENTRAL INSTRUMENT Check instrument panel operation:
DESCRIPTION AND OPERATION 5560.		 All OK
Go to Step 5		 Problems found
Device does not work		 Intervention
Replace the instrument panel
PROCEDURE OP. 5560B08
4 CHECK HIGH TEMPERATURE SIGNAL/SWITCH Check:
– engine coolant temperature gauge operation
– connection between switch and instrument panel
(Wiring diagram: E4010 "Instruments")		 All OK
Go to Step 5		 Problems found
Faulty switch		 Intervention
Replace switch
PROCEDURE OP. 1088E30
Problems found
Connections cut off		 Intervention
Restore components
5 CHECK CORRECT OPERATION Check the fault is no longer present All OK
End of test		 Problems found
–		 Intervention
–

Parts & tools for this job For 1998 Fiat Seicento

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