199003080 - P0380 Preheating unit control

This error is detected as a diagnosis of the final control stage (with details of s.c. to earth, s.c. to +Vbatt or open circuit), or if the electronic control module temperature reading is not within the specified limits for at least 0.3 s (wtih detail of excessive temperature).

		Test results
0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
	Check that the error details is not S.C. to earth	Move on to Step 2	The error detail is S.C. to earth	Move on to Step 1
1	ELECTRICAL CIRCUIT CHECK	All OK	Problems encountered	Operation
	Ensure fuse F59 (second from the left on the second row from the bottom) in the engine compartment junction unit has not blown.	Move on to Step 2	Fuse F59 has blown	Replace the engine compartment junction unit    Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R.
2	GLOW PLUG OPERATION CHECK	All OK	Problems encountered	Operation
	Check that the heater plugs are working properly, by carrying out the    See Test 5520CA CHECK GLOW PLUG OPERATION	End of diagnosis