P0670 Glow plugs control unit power supply

			Test results
1	COMPONENT CONCERNED	FUSE OPERATION CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Fuse	Check correct operation of the glow plug control unit 50 A supply fuse F02	Go to Step 2	Fuse damaged or broken	Replace the fuse and search for the cause which led to the malfunction
2	COMPONENT CONCERNED	GLOW PLUG CONTROL UNIT CONNECTIONS CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Glow plug control unit connections	Check whether the supply connector is correctly positioned	Go to Step 3	Supply connector detached	Restore the correct connections
3	COMPONENT CONCERNED	GLOW PLUG CONTROL UNIT OPERATION CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Heater plug control unit	Check that the glow plug control unit is working properly	End of diagnosis	Incorrect operation	Replace the glow plug control unit Op. 5520C20 HEATER PLUGS CONTROL UNIT - R.R