Contents

			Test results
1	COMPONENT CONCERNED	Wiring check between Powertrain Control Module and SDU control unit	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Wiring between Powertrain Control Module and SDU control unit	Check that the CAN connections between the Powertrain Control Module and the SDU control unit are not faulty. In particular, check that there are no open circuit or short circuit problems	Go to Step 2	There are faulty connections	Restore or, if necessary, replace the wiring
2	COMPONENT CONCERNED	SDU control unit connections check	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Connections on SDU control unit	Disconnect/reconnect the SDU control unit connectors and check for the presence of loose pins	Go to Step 3	Presence of a loose pin	Restore the correct operation of the connector
3	COMPONENT CONCERNED	Engine management control unit connections check	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Powertrain Control Module connections	Disconnect/reconnect the Powertrain Control Module connectors and check for a loose pin	Go to Step 4	Presence of a loose pin	Restore the correct operation of the connector
4	COMPONENT CONCERNED	Engine management control unit supply check	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Powertrain Control Module power supply	Check that the power supply for the Powertrain Control Module is correct	Go to Step 5	Power supply not correct	Restore the correct power supply
5	COMPONENT CONCERNED	SDU control unit power supply check	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	SDU control unit supply	Check that the power supply for the SDU control unit is correct	Go to Step 6	Power supply not correct	Restore the correct power supply
6	COMPONENT CONCERNED	CAN resistance check	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	CAN	Check that the resistance value between pins 24 and 50 of the SDU control unit is 60 ohm	End of diagnosis	Incorrect resistance value	Restore the correct continuity of the network