U0405 Cruise control module signal

			Test results
1	COMPONENT CONCERNED	CHECK ERRORS IN BODY COMPUTER	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Body Computer	Connect the diagnostic equipment to the Body Computer and check for the presence of errors on the Cruise Control lever	Go to Step 2	Presence of errors on the Cruise Control lever	Continue as instructed by the diagnosis equipment
2	COMPONENT CONCERNED	CHECK CONNECTIONS ON ENGINE MANAGEMENT CONTROL UNIT	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Connections on the engine management control unit	Check for loose connections on the engine management control unit and the Body Computer	Go to Step 3	Presence of loose connections	Restore the correct connections
3	COMPONENT CONCERNED	ENGINE MANAGEMENT CONTROL UNIT WIRING CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Engine management control unit wiring	Check the continuity of the wiring from the engine management control unit to the Body Computer	Go to Step 4	Faults in the continuity of the wiring	Restore the correct continuity for the wiring
4	COMPONENT CONCERNED	BODY COMPUTER OPERATION CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Body Computer	Check that the Body Computer is working correctly	Go to Step 5	The Body Computer is not working correctly	Replace Body Computer Op. 5505A35 MAIN BODY COMPUTER/JUNCTION UNIT - R.R.
5	COMPONENT CONCERNED	ENGINE MANAGEMENT CONTROL UNIT OPERATION CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Engine management control unit	Check that the engine management control unit is working correctly	End of diagnosis	Engine management control unit not working properly	Replace the engine management control unit Op. 1060G80