22 · Diagnostics

The vehicle does not run

Make: Alfa Romeo
Model: GT Factory Service Manual
Year: 2003–2010
Section: Gear shift › The vehicle does not run

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Fault diagnosisThe vehicle does not run

THE VEHICLE DOES NOT RUN

1.8 T.SPARK, 2.0 JTS

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). 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	STARTING ENABLEMENT CHECK	All OK	Problems met	Operation
		Results of the tests
	With the vehicle in neutral and the Examiner Plus or Smart in the parameters ambient, select the starting item and check whether it is permitted.	Continue to Step 1	Starting is not allowed	Continue to Step 2
1	STARTER MOTOR CHECK	All OK	Problems met	Operation
	Check that the starter motor is working properly	Continue to Step 2	Motor operation faulty	Restore the connections, if necessary, replace the starter motor Op. Op. 5520B10 STARTER MOTOR - R+R
2	OIL LEVEL CHECK	All OK	Problems met	Operation
	Check the oil level as described in See Test See Test 2127B OIL LEVEL CHECK	Continue to Step 4	Level below the Max reference	Top up the oil level Continue to Step 3
		Continue to Step 4	Level above the Max reference	Reduce to the Max level Continue to Step 4
3	CHECK FOR OIL LEAKS	All OK	Problems met	Operation
	Check that there are no oil leaks as described in See Test See Test 2127C HYDRAULIC GEAR SELECTION SYSTEM	Continue to Step 4	Oil leaks detected	Replace/repair the parts concerned, and top up the oil level Continue to Step 3
4	OIL PRESSURE CHECK	All OK	Problems met	Operation
	Check the oil pressure as described in See Test See Test 2127D OIL PRESSURE CHECK	Continue to Step 6	Pressure < 40 bar	Continue to Step 5
5	ELECTRIC PUMP OPERATION CHECK	All OK	Problems met	Operation
	Check the correct operation of the pump as described in See Test See Test 2127E ELECTRIC SPEED SELECTION SYSTEM	Continue to Step 6	Voltage below 11 V	Check the battery Continue to Step 5
		Continue to Step 6	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 6
6	CONTROL UNIT ERRORS CHECK	All OK	Problems met	Operation
	Check that there are no control unit errors. In particular: Clutch sensor error Clutch solenoid current error Pump relay error Load relay error Control unit broken error	Continue to Step 10	Presence of one or more of the errors included in the list	Continue to Step 7
7	CHECKS ON FAULTS DETECTED	All OK	Problems met	Operation
	Check the faults in accordance with See Test See Test 2127I What to do for error in Selespeed control unit	Continue to Step 9	Fault at the connections (Clutch sensor, Clutch solenoid valve current error, Pump relay error, Load relay error).	Repair/replace the wiring Continue to Step 9
			The active diagnosis is not successful and no faults are detected at the wiring (Clutch solenoid valve current)	Continue to Step 8
			Battery run down (Load relay error)	Restore the correct battery charge Op. 5530C14 Continue to Step 7
			Replace the Robotized Gearbox control unit (Control unit broken error)	Continue to Step 9
8	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. 2127C56 and check its operation by carrying out a C.M.	Continue to Step 9
9	POTENTIOMETER REPLACEMENT	All OK	Problems met	Operation
	If there is a clutch sensor error and no faults are detected at the connections/wiring, replace the clutch potentiometer Op. 2127E44 and check that the position reading is correct by carrying out a series of C.M.	Continue to Step 10
10	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 11
11	CHECK ON BRAKE PEDAL SWITCH	All OK	Problems met	Operation
	Check the operation of the brake pedal switch in accordance with See Test See Test 2127F CHECK ON BRAKE PEDAL SWITCH	End of diagnosis	The brake pedal switch is not working properly	Check the switch on the brake pedal, its fastening, its positioning, the wiring and the engine management control unit. Repair/replace the part that is not working Move on to step 12
12	AFTER THE BRAKE PEDAL SWITCH CHECK	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

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Parts & tools for this job For 2003 Alfa Romeo GT

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