Minimum engine oil pressure warning light on constantly

Make: Fiat
Model: Croma Factory Service Manual
Year: 2005–2010
Section: Instrument panel › Minimum engine oil pressure warning light on constantly

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Fault diagnosisMinimum engine oil pressure warning light on constantly

MINIMUM ENGINE OIL PRESSURE WARNING LIGHT ON CONSTANTLY

The Engine Management Node sends the message via the C-CAN to the Body Computer which makes it available via the B-CAN to the Instrument Panel Node.

Any problems in the C-CAN will light up the control unit warning lights which operate on this network. The CAN information check is designed to highlight precisely this

1	PRELIMINARY CHECKS	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the Examiner diagnostic equipment and check that the following are not present at the CAN information: Node(s) not active Node(s) faulty Node(s) with CAN error	Move on to Step 6	1.Engine Management Node not activated and/or faulty	1.Continue as described by the diagnostic equipment
		Move on to Step 6	2.Fault on CAN network	2.Continue as described by the diagnostic equipment
2	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check, using the Examiner, whether it is possible to connect with the Body Computer Node, that there are no errors and for the presence of parameters	Move on to Step 3	Presence of errors	Continue as described by the diagnostic equipment
3	ACTIVE DIAGNOSIS CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	With the Examiner in the Instrument Panel Node ambient check that the minimum oil pressure warning light is correctly activated in Active Diagnosis	Move on to Step 4	1.The warning light does not flash	1.Replace the instrument panel Op. 5560B10 CONTROL PANEL - R+R
		Move on to Step 4	2.The warning light flashes	2.Continue to step 4
4	OIL PRESSURE SENSOR CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check correct operation of the oil pressure sensor	Move on to Step 5	1.Pressure sensor defective	1.Replace pressure sensor Op. 1084A40 ENGINE OIL LEVEL SENSOR - R + R
			2.Oil circuit pressure not correct	2.Restore correct pressure
			3.Sensor wiring defective	3.Renew the wiring
5	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Using the Examiner check, in the Engine Management Node, that there are no errors and that the parameters are present	Move on to Step 6	Fault persists	Replace the Engine Management Control Unit Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R
5	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Using the Examiner check, in the Engine Management Node, that there are no errors and that the parameters are present	Move on to Step 6	Fault persists	Replace the Engine Management Control Unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - .R
6	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present	End of diagnosis

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Parts & tools for this job For 2005 Fiat Croma

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