323002747 - C022 THE GEARBOX IS STUCK IN A SPECIFIC GEAR (Robotized gearbox)

The vehicle remains with the gearbox locked in one gear when at a standstill and when the engine is accelerated the rpm increases (the gear engaged appears on the display)

		Test results
1	BATTERY VOLTAGE CHECK	All OK	Problems encountered	Operation
	Check battery status (no less than 11 Volts)Check the status of the connections and the wiring continuity between the engine compartment control unit and the gearbox control unitCheck that the gearbox control unit is receiving the correct power supply    See E7051 ROBOTIZED GEARBOX	Move on to Step 2	Battery voltage less than 11 Volts	Recharge/replace the battery if defective
			Gearbox control unit power supply wiring defective	Restore correct power supply
			Gearbox control unit earth connection defective.	Restore earth connection
2	FLUID LEVEL CHECK	All OK	Problems encountered	Operation
	Check the fluid level, carrying out the    See Test 2127OB FLUID LEVEL CHECK	Move on to Step 4	Fluid level lower than Max mark	Move on to Step 3
3	FLUID LEAKS CHECK	All OK	Problems encountered	Operation
	Check there are no fluid leaks, carrying out the    See Test 2127OC FLUID LEAKS CHECK	Move on to Step 4	Fluid leaks detected.	Repair/replace the parts involved, top up the fluid.
4	FLUID PRESSURE CHECK	All OK	Problems encountered	Operation
	Check the fluid pressure, carrying out the    See Test 2127OD FLUID PRESSURE CHECK	Move on to Step 6	Fluid pressure not correct	Move on to Step 5
5	ELECTRIC PUMP OPERATION CHECK	All OK	Problems encountered	Operation
	Check that the electric pump is working properly by carrying out the    See Test 2127OE ELECTRIC PUMP OPERATION CHECKCheck the continuity of the connection between gearbox control unit and the electric pump.Check the electric pump earth connection is correct	Move on to Step 6	Electric pump defective	Replace the electric pump    Op. 2127C30 HYDRAULIC SPEED SELECTION SYSTEM PUMP - R.R.
			Faulty power supply wiring	Restore the correct wiring
			Connection to earth defective	Restore earth connection.
6	FAULTY CONTROL UNITS CHECK	All OK	Problems encountered	Operation
	Select CAN information on the Examiner and check for the presence of any control units in error	Move on to Step 7	Control unit faulty	Continue as instructed by the diagnostic equipment
7	ERRORS IN CONTROL UNIT CHECK	All OK	Problems encountered	Operation
	Check that there are no errors in the automated gearbox control unit	Move on to Step 8	Presence of errors	Continue as instructed by the diagnostic equipment
8	CLUTCH CONTROL SOLENOID CHECK	All OK	Problems encountered	Operation
	Connect an Examiner to the gearbox control unit and check the operation of the clutch solenoid in active diagnosis	Move on to Step 9	Faulty clutch control solenoid valve	Replace clutch solenoid    Op. 2127C56 CLUTCH CONTROL SOLENOID - R.R.
			Gearbox control unit faulty	Replace the gearbox control unit    Op. 2127E10 HYDRAULIC SPEED SELECTION SYSTEM CONTROL UNIT - R.R.
9	GEAR SELECTION SOLENOID CHECK	All OK	Problems encountered	Operation
	Connect an Examiner to the gearbox control unitUse active diagnosis to check the operation of the gear selection solenoid	Move on to Step 10	Faulty gear selection control solenoid	Replace gear selection solenoid    Op. 2127C54 GEAR SELECTION SOLENOIDS - R.R.
			Gearbox control unit faulty	Replace the gearbox control unit    Op. 2127E10 HYDRAULIC SPEED SELECTION SYSTEM CONTROL UNIT - R.R.
10	EVEN AND ODD GEAR ENGAGEMENT SOLENOID CHECK	All OK	Problems encountered	Operation
	Connect an Examiner to the gearbox control unitUse active diagnosis to check the operation of the even and odd gear engagement solenoids	Move on to Step 11	Faulty even gear engagement solenoid	Replace even gear engagement solenoid    Op. 2127C52 ODD AND EVEN GEAR ENGAGEMENT SOLENOIDS - R.R.
			Faulty odd gear engagement solenoid	Replace odd gear engagement solenoid    Op. 2127C52 ODD AND EVEN GEAR ENGAGEMENT SOLENOIDS - R.R.
			Gearbox control unit faulty	Replace the gearbox control unit    Op. 2127E10 HYDRAULIC SPEED SELECTION SYSTEM CONTROL UNIT - R.R.
11	GEARBOX CONTROL UNIT CORRECT OPERATION CHECK	All OK	Problems encountered	Operation
	Check that the gearbox control unit is working properly	End of diagnosis	Gearbox control unit faulty	Replace the gearbox control unit    Op. 2127E10 HYDRAULIC SPEED SELECTION SYSTEM CONTROL UNIT - R.R.