22 · Diagnostics

Central locking / not working

Make: Fiat
Model: Multipla Factory Service Manual
Year: 1998–2010
Section: Doors › Central locking / not working

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Fault diagnosisCentral locking / not working

CENTRAL LOCKING / NOT WORKING

When the central locking is operagted using the key, the doors do not open / close at all.

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Check that the battery voltage is over 9 V	Continue to Step 1	Battery voltage below 9 V: in these conditions the door locks are not supplied by the control unit	Restore the correct battery voltage
1	CHECK OPERATION OF INDIVIDUAL DOORS	All OK	Problems met	Operation
	Check that, when the door lock/unlock is operated, none of the locks is activated	Continue to Step 2	Fault in one of the front locks	Check and if necessary replace the front door lock motors Op. 7005N21
			Fault in one of the rear locks	Check and if necessary replace the rear door lock motors Op. 7010N21
			Faulty connection between services control unit and one of the locks	Restore the connection between the central locking control unit and the door lock geared motors See E3040 CENTRAL LOCKING
2	CHECK CENTRAL LOCKING ELECTRICAL CIRCUIT	All OK	Problems met	Operation
	Check, in order: central locking fuse connection between junction unit and control unit central locking control supply central locking control unit earth connection between central locking control unit and locks See E3040 CENTRAL LOCKING	Continue to Step 3	Connections not correct	Restore the connections
			Component defective	Replace the component involved (if a fuse is involved, search for the cause of the problem)
			Control unit not working	Replace the component involved (if a fuse is involved, search for the cause of the problem)
3	CENTRAL LOCKING CONTROL UNIT CHECK	All OK	Problems met	Operation
	Check that the central locking control unit is working properly, see DESCRIPTION AND OPERATION: 5505 ELECTRICAL CIRCUIT FOR INSTRUMENTS/INDICATORS	Continue to Step 4	Control unit not working	Replace the central locking control unit Op. 7010N40
4	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Search for the fault starting from another symptom'

‹ Prev Rear door closing defective Next › Central locking / not working with remote control

Parts & tools for this job Staging For 1998 Fiat Multipla

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