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ELECTRIC STEERING - DESCRIPTION

The EPS (Electrical Power Steering) is a power assisted steering device designed to reduce the effort required for steering the vehicle by using the torque from an electric motor.

An electronic control unit manages and controls the system: by processing the input information and using a pre-programmed operating logic, the control unit determines the direction of rotation and the supply current for the electric motor, producing the desired servo-assistance effect.

It is possible to alter the level of power assistance for the electric steering through the ALFA dan system settings.

See E7074 ALFA DNA SYSTEM

An electric power steering failure warning light is present on the instrument panel.

For more details

See descriptions 4110 STEERING CONTROL AND LINKAGE

The control unit supply lines are protected by two dedicated fuses in the engine compartment junction unit.

ELECTRIC STEERING - FUNCTIONAL DESCRIPTION

The electric power assisted steering control unit M086 controls and regulates the electrically operated steering system.

The direct power supply for the control unit arrives from the battery, via the line for fuse F5 of the engine compartment junction unit B001, at pin A of connector A of M86. Pin B of connector A of M086 is earthed.

The ignition-controlled supply (15/54) protected by fuse F24 of B001 reaches pin 1 of connector B of M086.

The Body Computer M001 - connector A - receives a direct powr supply from the battery through the line protected by maxi fuse F01 of the engine compartment junction unit B001.

The Body Computer M001 receives an ignition-controlled power supply (INT) at pin 11 of connector E.

Pin 9 of connector E of M001 provides the Body Computer with a reference earth.

Control unit M086 is connected, via the CAN, pins 7 and 8 of connector B, to the other nodes, in particular the Body Computer M001 and the instrument panel E050, to which it sends the signals for the electric steering failure warning light.

The signals from the dna system selector H139 reach pin 56 of connector D of M001 and are sent, via the CAN, to control unit M086 for the adjustment of the steering.

See E7074 ALFA DNA SYSTEM

ELECTRIC STEERING - WIRING DIAGRAM

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The original SVG asset is absent from this archive. The captured text and component links below remain available.

Component code	Description	Reference to the assembly
A001	BATTERY	Op. 5530B10 BATTERY - R+R
B001	JUNCTION UNIT	Op. 5505A28 CONTAINER FOR ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R.
C001		-
C015	DASHBOARD EARTH, DRIVER'S SIDE	-
D001	FRONT/DASHBOARD COUPLING	-
E050	INSTRUMENT PANEL	Op. 5560B10 CONTROL PANEL - R+R
H001	IGNITION SWITCH	Op. 5520A18 IGNITION SWITCH CONTACT CARRIER LOCK BARREL - R.R.
M001	BODY COMPUTER	Op. 5505A35 MAIN BODY COMPUTER/JUNCTION UNIT - R.R.
M086	ELECTRIC STEERING CONTROL UNIT	Op. 4110D20 STEERING ELECTRICAL CONTROL DEVICE - R R

ELECTRIC STEERING - COMPONENT LOCATION

Diagram not captured
../955011471.image
The original SVG asset is absent from this archive. The captured text and component links below remain available.

Component code	Description	Reference to the assembly
A001	BATTERY	Op. 5530B10 BATTERY - R+R
B001	JUNCTION UNIT	Op. 5505A28 CONTAINER FOR ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R.
C001		-
C015	DASHBOARD EARTH, DRIVER'S SIDE	-
D001	FRONT/DASHBOARD COUPLING	-
E050	INSTRUMENT PANEL	Op. 5560B10 CONTROL PANEL - R+R
H001	IGNITION SWITCH	Op. 5520A18 IGNITION SWITCH CONTACT CARRIER LOCK BARREL - R.R.
M001	BODY COMPUTER	Op. 5505A35 MAIN BODY COMPUTER/JUNCTION UNIT - R.R.
M086	ELECTRIC STEERING CONTROL UNIT	Op. 4110D20 STEERING ELECTRICAL CONTROL DEVICE - R R