23 · Diagnostics

Front seat sliding not working

Make: Alfa Romeo
Model: 159 Factory Service Manual
Year: 2005–2011
Section: Seats › Front seat sliding not working

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Fault diagnosisFront seat sliding not working

FRONT SEAT SLIDING NOT WORKING

Longitudinal electrical adjustment not working/not working properly

1	CHECK ON SWITCH STATUS	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Select the following control unit at the diagnostic equipment: Driver''s/passenger seat control unit. Check the value of the following parameter: Sliding button and check that it indicates released when the switch is released and that it indicates pressed when the switch is pressed.	Move on to Step 5	The status of the switch does not change.	Move on to Step 2
2	CHECK ON WIRING CONNECTIONS AT SLIDING SWITCH	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the connection of the wiring at the switch for the electric seat control. Also check for any oxidation/impurities at the connector/switch.	Move on to Step 3	1.Switch wiring connector detached or badly positioned on seat mounting.	1.Attach connector correctly to switch.
		Move on to Step 3	2. Presence of oxidation/impurities at connector/control unit.	2.Eliminate oxidation/impurities at connector/switch.
3	CHECK ON WIRING CONNECTIONS AT CONTROL UNIT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the connection of the wiring at the control unit for the electric seat control. Also check for any oxidation/impurities at the connector/control unit.	Move on to Step 4	1.Seat wiring connector detached or badly positioned on seat control unit.	1.Attach connector correctly to control unit.
		Move on to Step 4	2. Presence of oxidation/impurities at connector/control unit	2.Eliminate oxidation/impurities at connector/control unit.
4	SLIDING SWITCH OPERATION CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the sliding switch is working properly	Move on to Step 9	Incorrect operation of switch.	Replace the switch Op. 7045J50 DRIVER'S SIDE FRONT SEAT POSITION MEMORISATION SYSTEM ECU - R+R FOLLOWING ELECTRICAL WIRING CHECK
5	CHECKS USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Keeping the diagnostic equipment connected, check: through active diagnosis that the sliding actuator is working properly.	Move on to Step 9	Incorrect operation of sliding actuator.	Move on to Step 6
6	CHECK ON CONNECTION AT MOTOR	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the connection is correctly attached at the motor Also check for any oxidation/impurities at the connector/motor.	Move on to Step 7	1.Connectors at motor detached or badly positioned.	1.Attach connector correctly to motor
		Move on to Step 7	2.Presence of oxidation/impurities at connector/motor.	2.Eliminate oxidation/impurities at connector/motor.
7	CHECK ON ELECTRIC SEAT WIRING	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the condition of the electric seat wiring.	Move on to Step 8	Presence of cuts/tears in the seat wiring.	Replacement of the torn/broken wiring see wiring diagram See E3076 ELECTRICALLY-ADJUSTABLE SEATS
8	CHECK ON CORRECT ENGAGEMENT OF PROPELLER SHAFTS	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the propeller shafts between the motor and the steering rack engage correctly	Move on to Step 9	Shafts detached/broken	Correct engagement/replacement of transmission cable(s) or replacement of motor assembly Op. 7045J26 FRONT SEAT SLIDE MOTOR, L/H OR R/H - R+R FOLLOWING ELECTRICAL WIRING CHECK
9	DRIVER''S/PASSENGER SEAT CONTROL UNIT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Replace the driver''s/passenger seat control unit Op. 7045J36 SEAT MOVEMENT ECU R R FOLLOWING ELECTRICAL CIRCUIT CHECK	End of diagnosis	The fault persists	Contact technical service for further information on the problem

The seat does not move forwards, there are difficulties attaching the sliding guides

1	CHECK ON CORRECT ATTACHMENT OF BOWDEN CABLE	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the bowden cable is correctly attached or whether it is broken at the attachment device	Move on to Step 2	Bowden cable disconnected from the housing (lever, device) or broken	Reposition bowden cable or replace it.
2	CHECK ON CONDITION OF GUIDE RELEASE	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the condition of the guide release ratchet mechanism at the connecting rod.	Move on to Step 3	Plastic ratchet mechanism broken/distorted.	Replace guide release ratchet mechanism
3	CHECK ON GUIDE DEVICE	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the condition of the guide device.	Move on to Step 4	Device on sliding guide broken/distorted.	Replace the sliding guides Op. 7045A66 SLIDING GUIDE (ONE),LEFT OR RIGHT FOR FRONT SEAT - R.R.
4	CHECK FOR PRESENCE OF FOREIGN BODIES BETWEEN GUIDE PROFILES	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that there are no foreign bodies between the guide profiles and/or in the guide control mechanism.	Move on to Step 5	Presence of foreign bodies that adversely affect the operation of the system.	Remove the foreign bodies from the system.
5	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present	End of diagnosis	The fault persists	Replace the sliding guides Op. 7045A66 SLIDING GUIDE (ONE),LEFT OR RIGHT FOR FRONT SEAT - R.R.

‹ Prev Parking device not working Next › Front seat backrest angle adjustment not working

Parts & tools for this job Staging For 2005 Alfa Romeo 159

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