22 · Diagnostics

The vehicle does not run

Make: Fiat
Model: Stilo Factory Service Manual
Year: 2001–2007
Section: Gear shift › The vehicle does not run

‹ Prev The revs increase as the vehicle sets off Next › The gearbox is stuck

Fault diagnosisThe vehicle does not run

THE VEHICLE DOES NOT RUN

2.4 20v

The engine does not start

The display shows the gear engaged but will not go into neutral to allow starting

Preliminary check: If during engine starting you notice that the starter motor works normally, the problem is caused by other systems (engine management, ABS, fuel pump, etc.). Reference is made to the specific diagnoses.

If the starter motor does not turn (after checking its operation and the relevant electrical circuit), continue with the next diagnostic chart

0	OIL LEVEL CHECK	All OK	Problems met	Operation
		Results of the tests
	Check the oil level See Test 2127B OIL LEVEL CHECK	Continue to Step 2	Level below Max reference	Top up the oil level Continue to Step 1
	Check the oil level See Test 2127B OIL LEVEL CHECK	Continue to Step 2	Level above Max reference	Reduce to Max level Continue to Step 2
1	CHECK FOR OIL LEAKS	All OK	Problems met	Operation
	Check that there are no oil leaks See Test 2127C CHECK FOR FLUID LEAKS	Continue to Step 2	Oil leaks detected	Replace/repair the relevant parts, top up the oil level Continue to Step 1
2	OIL PRESSURE CHECK	All OK	Problems met	Operation
	Check the oil pressure See Test 2127D OIL PRESSURE CHECK	Continue to Step 4	Pressure < 40 bar	Continue to Step 3
3	CHECK PUMP OPERATION	All OK	Problems met	Operation
	Check that the pump is working properly See Test 2127E ELECTRIC PUMP OPERATION CHECK	Continue to Step 4	Voltage below 11 V	Check the battery Continue to Step 3
		Continue to Step 4	It is not possible to make gear changes from the lever	Activate the 'clutch bleed' service from the Examiner Plus or Smart to activate the pump Continue to Step 3
4	CONTROL UNIT ERRORS CHECK	All OK	Problems met	Operation
	Check that there are no control unit errors. In particular: Clutch sensor error Clutch solenoid valve current error Pump relay error Load relay error Selespeed pump error Engagement sensor error Control unit broken error	Continue to Step 7	Presence of one or more of the errors included in the list	Continue to Step 5
5	CHECKS ON FAULTS DETECTED	All OK	Problems met	Operation
	Check the faults See Test 2127I What to do depending on the error' present in the Selespeed control unit No accelerator pedal information.	End of diagnosis	Faulty connections (Clutch sensor, Clutch solenoid current, Pump relay error, Load relay error, Selespeed pump, and/or Engagement sensor)	Repair/replace the wiring Continue to Step 6
			There are no faulty connections (Clutch sensor)	Replace the clutch actuator (CSC) and check its operation by carrying out a gear change Continue to Step 6
			There are no faulty connections (Clutch solenoid current)	Replace the solenoid valve Op. 2127C56and check its operation by carrying out a gear change. Continue to Step 6
			Fault in pump relay and/or fuse (Selespeed pump)	Replace the component Continue to Step 6
			Pump winding faults (Selespeed pump)	Replace the component Op. 2127C30 Continue to Step 6
			There are no faulty connections (Engagement sensor)	Replace the engagement potentiometer and check the correct reading of the position by carrying out a series of gear changes. Continue to Step 6
6	AFTER THE CHECKS ON THE FAULTS DETECTED	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	The fault persists	Continue to Step 7
7	CHECK ON BRAKE PEDAL SWITCH	All OK	Problems met	Operation
	Check the operation of the brake pedal switch See Test 2127F CHECK ON BRAKE PEDAL SWITCH	Continue to Step 9	The brake pedal switch is not working properly	Check the state of the connections, the wiring and the switch. Repair/replace the part that is not working. Continue to Step 8
8	AFTER THE CHECK ON THE BRAKE PEDAL SWITCH	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	The fault persists	Continue to Step 9
9	CHECK THE LAYOUT OF THE CLUTCH SENSOR WIRING	All OK	Problems met	Operation
	Check the state of the connections, continuity of the wiring (it is important to pay particular attention to the layout of the clutch position sensor wiring in the engine compartment: the wire must not be too taut, and it must have sufficient slack)	Continue to Step 10	There is a fault	Repair/replace the part that is not working Continue to Step 10
10	CHECK THAT THE FAULT IS NO LONGER PRESENT	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	The fault persists	Contact Technical Service for further information on the problem

‹ Prev The revs increase as the vehicle sets off Next › The gearbox is stuck

Parts & tools for this job For 2001 Fiat Stilo

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