23 · Diagnostics

The car goes into neutral by itself

Make: Fiat
Model: Panda Factory Service Manual
Year: 2003–2012
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

1.2 8v

Whilst stopping

When travelling at speeds below 80 km/h

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

0	CONTROL UNIT ERRORS CHECK	All OK	Problems met	Operation
		Results of the tests
	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 5	Presence of one or more of the errors included in the list	Continue to Step 1
1	CHECKS ON FAULTS DETECTED	All OK	Problems met	Operation
	Check the faults according to the See Test 2127I What to do for error in Selespeed control unit	Continue to Step 3	Replace the Robotized Gearbox control unit (Microprocessor error 2)	Continue to Step 3
			Faulty connections (CAN errors, Electromagnetic brake error, Clutch sensor and/or Selespeed pump)	Repair/replace the wiring Continue to Step 3
			One of the control units does not dialogue (Errors on CAN network)	Repair/replace the control unit concerned Continue to Step 3
			Faulty connection (Engine speed)	Repair/replace the part concerned Continue to Step 3
			The active diganosis is not successful and there are no faults detected at the wiring (Clutch solenoid valve)	Continue to Step 2
			Faulty pump relay and/or fuse (Selespeed pump)	Replace the component Continue to Step 3
			Faults on pump winding (Selespeed pump)	Replace the component Op. 2127C30 Continue to Step 3
2	AFTER THE SOLENOID VALVE ACTIVE DIAGNOSIS	All OK	Problems met	Operation
	If this step has been reached for the active diagnosis of the clutch solenoid valve, replace it Op. 2127C56and check the operation by carrying out a C.M.	Continue to Step 4
3	SOLENOID VALVE REPLACEMENT	All OK	Problems met	Operation
	If there is an electromagnetic brake error and no faults are detected at the connections/wiring, replace Op. 2127C54and check brake operation	Continue to Step 4
4	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 5
5	OIL LEVEL CHECK	All OK	Problems met	Operation
	Check the oil level as described in See Test 2127B OIL LEVEL CHECK	Continue to Step 7	Level below the Max reference	Top up the oil level Continue to Step 6
		Continue to Step 7	Level above the Max reference	Reduce to the Max level Continue to Step 7
6	CHECK FOR OIL LEAKS	All OK	Problems met	Operation
	Check that there are no oil leaks as described in See Test 2127C CHECK FOR OIL LEAKS	Continue to Step 7	OIl leaks detected	Replace/repair the parts concerned, and top up the oil level Continue to Step 6
7	OIL PRESSURE CHECK	All OK	Problems met	Operation
	Check the oil pressure as described in 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 9	Pressure < 40 bar	Continue to Step 8
8	ELECTRIC PUMP OPERATION CHECK	All OK	Problems met	Operation
	Check the correct operation of the pump as described in See Test 2127E ELECTRIC PUMP OPERATION CHECK	Continue to Step 9	Voltage below 11 V	Check the battery Continue to Step 8
		Continue to Step 9	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 9
9	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 2 seconds, the brake not pressed and the speed is below 4.5 km/h)	Continue to Step 10	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
10	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 80 km/h when the brake and accelerator pedals are released)	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

When changing gear with the vehicle moving

0	CONTROL UNIT ERRORS CHECK	All OK	Problems met	Operation
		Results of the tests
	Check that there are no control unit errors. In particular: Electromagnetic brake (Selection solenoid) Odd or even gear engagement (engagement solenoids)	Continue to Step 5	Presence of one or more of the errors included in the list	Continue to Step 1
1	CHECKS ON FAULTS DETECTED	All OK	Problems met	Operation
	Check the faults according to the See Test 2127I What to do for error in Selespeed control unit	Continue to Step 3	Faulty connections	Repair/replace the wiring Continue to Step 3
		Continue to Step 3	The active diagnosis is not successful and there are no faults detected at the wiring (Odd or even gear engagement)	Continue to Step 2
2	AFTER ACTIVE DIAGNOSIS OF THE SOLENOID	All OK	Problems met	Operation
	If this step has been reached for the active diagnosis of the engagement solenoid valve, replace it Op. 2127C52and check the operation	Continue to Step 3
3	SOLENOID VALVE REPLACEMENT	All OK	Problems met	Operation
	If there is an electromagnetic brake error and no faults are detected at the connections/wiring, replace Op. 2127C54and check brake operation	Continue to Step 4
4	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 5
5	OIL LEVEL CHECK	All OK	Problems met	Operation
	Check the oil level as described in See Test 2127B OIL LEVEL CHECK	Continue to Step 7	Level below the Max reference	Top up the oil level Continue to Step 6
		Continue to Step 7	Level above the Max reference	Reduce to the Max level Continue to Step 7
6	CHECK FOR OIL LEAKS	All OK	Problems met	Operation
	Check that there are no oil leaks as described in See Test 2127C CHECK FOR OIL LEAKS	Continue to Step 7	OIl leaks detected	Replace/repair the parts concerned, and top up the oil level Continue to Step 6
7	OIL PRESSURE CHECK	All OK	Problems met	Operation
	Check the oil pressure as described in 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 9	Pressure < 40 bar	Continue to Step 8
8	ELECTRIC PUMP OPERATION CHECK	All OK	Problems met	Operation
	Check the correct operation of the pump as described in See Test 2127E ELECTRIC PUMP OPERATION CHECK	Continue to Step 9	Voltage below 11 V	Check the battery Continue to Step 8
		Continue to Step 9	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 9
9	CHECK ENGAGEMENT OF ALL GEARS	All OK	Problems met	Operation
	Check that all the gears engage correctly in accordance with See Test 2127J CHECK ON CORRECT ENGAGEMENT OF ALL GEARS USING THE GEAR LEVER WITH THE ENGINE RUNNING	End of diagnosis	The test is not successful	Contact Technical Service for further information on the problem

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

Parts & tools for this job Staging For 2003 Fiat Panda

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