Alarm volumetric surveillance not working

Make: Fiat
Model: Ulysse Factory Service Manual
Year: 2002–2010
Section: Alarm › Alarm volumetric surveillance not working

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Fault diagnosisAlarm volumetric surveillance not working

ALARM VOLUMETRIC SURVEILLANCE NOT WORKING

When the alarm is switched on using the remote control, the system is activated correctly but the volumetric sensors do not intervene.

The volumetric sensors are located in the front courtesy light and are connected to the Alarm Node.

The volumetric sensors can be excluded by the customer using the special button.

The networks are on stand-by 30 mins after the engine is switched off. This makes it impossible to carry out the fault diagnosis. If a diagnostic session has to be opened, start up the engine to reawaken the networks.

STEP	OPERATIONS TO BE CARRIED OUT	TEST RESULTS
0	PRELIMINARY CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the volumetric protection exclusion button: has not been pressed accidentally that the contacts are normally closed. that the connector is correctly connected and that the wiring connected to the NAL conforms. Check the connections and the wiring between the volumetric sensors and the NAL.	Move on to Step	1. Button is pressed	1. Release/replace the button.
			2. Button contacts normally open.	2. Replace the button.
			3. Connections and/or wiring between button and alarm node does not conform.	3. Renew connections and wiring between button and alarm node (NAL).
			4. Connections and/or wiring between SU and alarm node does not conform.	4. Renew connections and wiring between SU and alarm node (NAL).
1	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the Examiner diagnostic equipment to the diagnostic socket and check the following at the Alarm NodeIn errors ambient: Ultrasound sensors defective. Control unit broken.	Move on to Step	1. Ultrasound sensors defective.	1. Replace the volumetric sensors
		Move on to Step	2. Control unit broken error.	2. Replace the alarm node (NAL)
2	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present.

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