22 · Diagnostics

The car goes into neutral by itself

Make: Fiat
Model: Stilo Factory Service Manual
Year: 2001–2007
Section: Gear shift › The car goes into neutral by itself

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Fault diagnosisThe car goes into neutral by itself

THE CAR GOES INTO NEUTRAL BY ITSELF

2.4 20v

Whilst stopping

Travelling at a speed of below 40 km/h

When stationary with a gear engaged (1st, 2nd or R)

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 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 the 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, and 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 Neutral for low pressure only exists if the vehicle is stationary or moving at low speed (about 10-15 km/h)	Continue to Step 4	Pressure < 40 bar	Continue to Step 3
3	CHECK ON 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: Microprocessor 2 error (in the following condiions: engine on, accelerator pedal released, brake not pressed and speed below 4.5 km/h) Errors on CAN network (in the following conditions: engine on, accelerator pedal released, brake not pressed and speed below 4.5 km/h) Engine speed (in the following conditions: engine on, accelerator pedal released, brake not pressed and speed below 4.5 km/h) Electromagnetic brake (Selection solenoid) Clutch solenoid current Clutch sensor Selespeed pump	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	One of the control units does not dialogue (Errors on CAN network)	Repair/replace the control unit concerned Continue to Step 6
			Faulty connection (Engine speed)	Repair/replace the part concerned Continue to Step 6
			Faulty connections (Electromagnetic brake, Clutch solenoid current, Clutch sensor and/or Selespeed pump)	Repair/replace the wiring Continue to Step 6
			The test is not successful (Electromagnetic brake)	Replace the solenoid valve Op. 2127C54 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
			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
			Fault in pump relay and/or fuse (Selespeed pump)	Replace the component Continue to Step 6
			Faults on pump winding (Selespeed pump)	Replace the component Op. 2127C30 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	DOOR SWITCH CHECK	All OK	Problems met	Operation
	Check the state of the driver's door switch (it should be remembered that the system recognizes the opening of the door if the accelerator pedal is released for 4 seconds, the brake not pressed and the speed is below 4.5 km/h)	Continue to Step 9	The door 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 DOOR SWITCH CHECK	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 CORRECT OPERATION OF THE LEVER	All OK	Problems met	Operation
	Check the operation of the lever (remembering that neutral can be engaged with the vehicle moving at speeds below 40 km/h)	End of diagnosis	The lever is not working properly	Check the state of the connections and the wiring. Repair/replace the part that is not working Continue to Step 10
10	AFTER THE CHECK ON THE CORRECT OPERATION OF THE LEVER	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Search for the fault starting from another symptom'

When changing gear with the vehicle moving

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 parts concerned, and 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 Neutral for low pressure only exists if the vehicle is stationary or moving at low speed (about 10-15 km/h)	Continue to Step 4	Pressure < 40 bar	Continue to Step 3
3	CHECK ON PUMP OPERATION	All OK	Problems met	Operation
	Check the correct operation of the pump 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: Electromagnetic brake (Selection solenoid) Odd or even gear engagement (engagement solenoids)	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	Connection faults (Electromagnetic brake, Clutch sensor)	Repair/replace the wiring Continue to Step 6
			The test is not successful (Electromagnetic brake)	Replace the solenoid valve Op. 2127C54 Continue to Step 6
			The test is not successful (Odd or even gear engagement)	Replace the solenoid valve Op. 2127C52 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 ENGAGEMENT OF ALL GEARS	All OK	Problems met	Operation
	Check that all the gears engage correctly See Test 2127J CHECK ON CORRECT ENGAGEMENT OF ALL GEARS USING THE GEAR LEVER WITH THE ENGINE RUNNING	Continue to Step 8	The test is not successful	Contact Technical Service for further information on the problem
8	CHECK THAT THE FAULT IS NO LONGER PRESENT	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Search for the fault starting from another symptom'

‹ Prev The gearbox is noisy Next › The engine revs increase whilst changing gear

Parts & tools for this job For 2001 Fiat Stilo

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