		Test results
0	PRELIMINARY CHECK	All OK	Problems encountered	Operation
	The Customer complains of a loss in performance without the warning light coming on, especially after short radius steering manoeuvres.	Move on to Step 1	The same as the Customer.	DO NOT replace the Electric Steering Unit. The system is working perfectly. The thermal protection has tripped during the operation of the electric steering.
1	VISUAL INSPECTION	All OK	Problems encountered	Operation
	With the panel on, the steering wheel is rotated simultaneously to the left or the right. Check whether the problem is solved by calibrating the system.	Move on to Step 2	The problem persists or it is impossible to carry out the calibration.	Replace the Electric Steering assembly. Op. 4110D20 STEERING ELECTRICAL CONTROL DEVICE - R R
2	VISUAL INSPECTION	All OK	Problems encountered	Operation
	Strong steering wheel vibrations with the vehicle stationary, constantly, or in certain steering positions.	Move on to Step 3.	Steering box defective.	DO NOT replace the Electric Steering unit
		Move on to Step 3.	No problems are detected in the steering box.	Replace the Electric Steering assembly. Op. 4110D20 STEERING ELECTRICAL CONTROL DEVICE - R R
3	CORRECT OPERATION CHECK	All OK	Problems encountered	Operation
	Connect the Examiner diagnostic equipment in Parameter Reading mode for the Electric Steering Node, and check the parameter values and that there are no errors.	Move on to Step 9.	Impossible to connect to the control unit.	Move on to Step 4.
			Low battery voltage parameter reading.	Move on to Step 8.
			Presence of errors.	Move on to Step 10.
4	ELECTRICAL POWER SUPPLY CHECK	All OK	Problems encountered	Operation
	Check the electrical power supply to the Electric Steering Node is correct. With the panel off, check for a voltage of around 12.5V at the blue power supply connector. With the panel on, check for the same voltage at PIN 1 of the black connector for the CAN line signals. See E7045 ELECTRIC STEERING	Move on to Step 5.	Battery voltage faulty.	Move on to Step 8
		Move on to Step 5.	Fault in positive electrical supply and/or earth.	Replace the component causing the problem (in the case of a fuse, find out what caused the damage).
5	ELECTRICAL CONNECTIONS CHECK	All OK	Problems encountered	Operation
	Check the electrical connections for the Electric Steering Node and the Body Computer, searching for any loose connections creating occasional breaks in the power supply. In particular, make sure that every PIN is correctly connected and fitted in place. See E7045 ELECTRIC STEERING	Move on to Step 6.	Electrical connections not working.	Restore the damaged electrical connections.
6	NO RESIDUAL VOLTAGE CHECK	All OK	Problems encountered	Operation
	Start up the engine and then switch it off. At this point, with the panel off, check that the voltage at PIN 1 of the black connector for the CAN line signals is effective 0V. See E7045 ELECTRIC STEERING	Move on to Step 7.	The voltage at PIN 1 with the panel off is more than 0 V.	DO NOT replace the Electric Steering Unit. Electrical equipment problem. Contact TESEO
7	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Recheck the possibility of connecting to the Electric Steering Node using the Examiner.	Move on to Step 3.	Impossible to connect to the control unit.	Replace the Electric Steering assembly. Op. 4110D20 STEERING ELECTRICAL CONTROL DEVICE - R R
8	BATTERY ELECTRICAL CHECK	All OK	Problems encountered	Operation
	Check the following, in order: - Battery voltage correct. - Battery wiring correctly fastened. See E1010 POWER SUPPLY	End of diagnosis.	Services battery voltage faulty.	Restore the correct operation of the battery.
		End of diagnosis.	Loose connections detected in the Electric Steering Node power supply circuit	Repair the wiring
9	ELECTRICAL CONNECTIONS CHECK	All OK	Problems encountered	Operation
	Check the electrical connections for the Electric Steering Node, searching for any loose connections creating occasional breaks in the power supply. In particular, make sure that every PIN is correctly connected and fitted in place. Take GREAT care over the positive battery terminal leading to the 70 A fuse for the electric steering (left terminal). If it is secured but NOT correctly fitted in place, disconnect it and fasten it correctly. See E7045 ELECTRIC STEERING	End of diagnosis.	Electrical connections not working.	Restore the damaged electrical connections.
10	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Check for the presence of the following error using the Examiner in the Electric Steering Node evironment: - C1005, bulb failure.	End of diagnosis.	Bulb faulty.	DO NOT replace the Electric Steering Assembly. Check for the presence of similar errors in the Instrument Panel. Check the operation of the Instrument Panel and Body Computer Node Check the CAN connections.

The Customer complains of failed operation (hardness when steering or loss of performance) WITHOUT the failure warning light coming on