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Fiat Croma Factory Service Manual (2005-2010)22 · Fault diagnosis

Fiat
Croma Factory Service Manual (2005-2010)
Fault diagnosis
Engine
Cruise control not working under any conditions

22 · Diagnostics

Cruise control not working under any conditions

Make: Fiat
Model: Croma Factory Service Manual
Year: 2005–2010
Section: Engine › Cruise control not working under any conditions

‹ Prev Engine cuts out whilst running (then restarts)Next › Cruise control recall control not working

Fault diagnosisCruise control not working under any conditions

CRUISE CONTROL NOT WORKING UNDER ANY CONDITIONS

The Cruise Control system controls do not work under any circumstances

1	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the diagnostic test equipment (Examiner or other instruments) to the tester input. Check for the presence of faults in the engine management control unit	Move on to Step 2	1. Error detected in the control unit	1. Continue following the instructions for the diagnostic equipment
		Move on to Step 2	2. No communication with the control unit	2. Restore the connection between the engine management control unit and the diagnostic connector: wiring diagram See E5060 CRUISE CONTROL
2	CRUISE CONTROL SELECTOR CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the Cruise Control contacts are working properly See Test 5580AA CHECK ON CRUISE CONTROL ON/OFF CONTROL	Move on to Step 3	No continuity	Replace the Cruise Control lever assembly Op. 5580A10 CRUISE CONTROL LEVER ASSEMBLY - R+R
3	SUPPLY CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	With the ignition key in the ON position and the Cruise Control ON, check that there is a voltage signal from the Cruise Control to the engine management control unit: See E5060 CRUISE CONTROL	Move on to Step 4	1.No voltage detected	1.Repair the connections: See E5060 CRUISE CONTROL
		Move on to Step 4	2.Wiring interrupted	2.Replace the fuse after having eliminated the cause
4	CONNECTIONS CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the electrical continuity of the wiring between the junction unit, ignition switch, engine management control unit and Cruise Control system control: See E5060 CRUISE CONTROL	Move on to Step 5	No continuity	Repair the connections: See E5060 CRUISE CONTROL
5	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present	End of diagnosis	The fault persists: control unit defective	Replace the engine management control unit Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R

‹ Prev Engine cuts out whilst running (then restarts)Next › Cruise control recall control not working

Parts & tools for this job For 2005 Fiat Croma

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