199003087 - P0638 Throttle valve control

This error is indicated in the event of a short circuit to earth (with detail of s.c. to earth), a short circuit to positive (with detail of s.c. to +Vbatt) or a break (with detail of open circuit) in the connection circuit to control unit Pin 59 for at least 0.24 s or if the detected electronic control module temperature is not within the specified limits for at least 0.24 s (with 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	Continue carrying out the    See Test 1064BE CHECK TURBO VALVE PROTECTION FUSE
2	CHECK ON THROTTLE CASING OPERATION
	Check that the integrated throttle casing actuator is working properly by carrying out the    See Test 1060GO INTEGRATED THROTTLE BODY OPERATION CHECK	End of diagnosis	-	-