Alfa Romeo 159 1.9 JTD 8V Da 01/06 — STARTING AND RECHARING — — WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION — WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION

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WIRING DIAGRAM - STARTING AND RECHARING - Alfa Romeo 159 1.9 JTD 8V Da 01/06

STARTING AND RECHARGING - WIRING DIAGRAM Alfa Romeo 159 1.9 JTD 8V Da 01/06

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COMPONENTS - STARTING AND RECHARING - Alfa Romeo 159 1.9 JTD 8V Da 01/06

Component code	Description	Reference to the operation
A001	BATTERY
A010	ALTERNATOR
A020	STARTER MOTOR
B001	JUNCTION UNIT
B002	JUNCTION UNIT UNDER DASHBOARD
B099	MAXIFUSE BOX ON BATTERY
C010	LEFT FRONT EARTH	-
C015	DASHBOARD EARTH, DRIVER'S SIDE	-
C020	PASSENGER SIDE DASHBOARD EARTH	-
D001	FRONT/DASHBOARD COUPLING	-
D004	FRONT/ENGINE COUPLING	-
D006	FRONT/REAR COUPLING	-
D029	ENGINE CABLES/ENGINE SERVICES CABLE COUPLING	-
E050	INSTRUMENT PANEL
H002	STARTING PUSH BUTTON
H003	IGNITION DEVICE
I030	BRAKE PEDAL SWITCH
I031	CLUTCH PEDAL SWITCH
I050	INERTIA SWITCH
M001	BODY COMPUTER
M055	AUTOMATIC TRANSMISSION CONTROL UNIT	-
M089	STEERING LOCK CONTROL UNIT (NBS)

COMPONENT LOCATION - STARTING AND RECHARING - Alfa Romeo 159 1.9 JTD 8V Da 01/06

STARTING AND RECHARGING - COMPONENT LOCATION Alfa Romeo 159 1.9 JTD 8V Da 01/06

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Component code	Description	Reference to the operation
A001	BATTERY
A010	ALTERNATOR
A020	STARTER MOTOR
B001	JUNCTION UNIT
B002	JUNCTION UNIT UNDER DASHBOARD
B099	MAXIFUSE BOX ON BATTERY
C010	LEFT FRONT EARTH	-
C015	DASHBOARD EARTH, DRIVER'S SIDE	-
C020	PASSENGER SIDE DASHBOARD EARTH	-
D001	FRONT/DASHBOARD COUPLING	-
D004	FRONT/ENGINE COUPLING	-
D006	FRONT/REAR COUPLING	-
D029	ENGINE CABLES/ENGINE SERVICES CABLE COUPLING	-
E050	INSTRUMENT PANEL
H002	STARTING PUSH BUTTON
H003	IGNITION DEVICE
I030	BRAKE PEDAL SWITCH
I031	CLUTCH PEDAL SWITCH
I050	INERTIA SWITCH
M001	BODY COMPUTER
M055	AUTOMATIC TRANSMISSION CONTROL UNIT	-
M089	STEERING LOCK CONTROL UNIT (NBS)

DESCRIPTION - STARTING AND RECHARING - Alfa Romeo 159 1.9 JTD 8V Da 01/06

The ignition and recharging circuit comprises the battery, starter motor and alternator.The starter motor consists of a d.c. motor supplied by the battery and an excitation electromagnet.769This vehicle is equipped with a starting system known as Smart-Key, whereby the traditional ignition key has been replaced with an electronic key "T.E.G.", (Transmitter for Entry and Go), combined with an electronic key reader and TEG-Reader radio frequency receiver.The vehicle is not started by inserting the key and turning it in the ignition switch (which is not present), but by inserting the TEG in the TEG Reader and operating the START/STOP button.Pressing the START button supplies the motor windings producing electromagnetic forces that rotate the actual motor pinion. This simultaneously activates the electromagnet that operates the mechanism that causes the pinion to mesh with the flywheel ring gear and thus turn the crankshaft.The alternator recharges the battery during normal engine rotation. The alternator shaft (rotor) is turned by the crankshaft via a belt. When supplied by an excitation current, the rotor generates a magnetic field that sets up an alternating current in the fixed winding (stator). A diode rectifier bridge at the back of the alternator allows the alternating current to be transformed into a direct current that is sent to recharge the battery.A voltage governor, also built into the alternator, maintains the power supply at a constant voltage (14 V) throughout all load variation and engine speed ranges.The efficiency of the recharging system is controlled by the Body Computer which measures the D+ signal coming from the alternator with the engine moving (revs above 700 rpm).If the voltage measured is insufficient, the warning light in the instrument panel is switched on as well as the display of a message.The fuse box on the battery includes an automatic battery disconnection device that, in emergencies, cuts off the supply to the engine starting/recharging lead.This interruption is controlled by the inertia switch in the same way as for the fuel pump.

FUNCTIONAL DESCRIPTION - STARTING AND RECHARING - Alfa Romeo 159 1.9 JTD 8V Da 01/06

The START/STOP button H2 receives a power supply - pins 3 and 5 - from the steering lock control unit M89, which "relays" the direct power supply coming - at pin C1 of M89 - from the line protected by fuse F3 of the engine compartment junction unit B1.The lighting for the button is guaranteed by the ignition-controlled line (INT) protected by fuse F49 of the junction unit under the dashboard B2.When the button is pressed, "AVV" signals are sent from pins 4 and 6 of H2 to M89 - pins B6 and B7; tha latter supplies the electromagnet winding - from pin B8 - pin 50 of the starter motor A20 - connector B.767The supply and control signals for button H2 are "redundant" (two identical duplicate signals) for safety reasons, the wish of the user is recognized by means of the presence of only one of the two signals.The steering lock control unit M89 provides this power supply after a series of controls and checks.In particular, the TEG inserted status is sent by the TEG Reader H3 via the CAN - pins 3 and 8.The same signal is sent in a redundant manner to the steering lock node M89, form pin 2, and the latter, in turn, forwards it via the CAN.The starting go ahead only takes place if the clutch or the brake pedal is pressed: the control unit M89 receives the signal coming from the clutch switch I31 at pin A5 and the two brake pedal signals I30; the N.A. contact (pedal pressed) at pin C4 of M89 and the N.C. contact (pedal released) at pin C7 of M89.On versions with automatic transmission, when the gearbox is not in Park or Neutral, the starting of the vehicle is inhibited: a signal is sent from pin 5 of connector A of the automatic transmission control unit M55 to pin B4 of the steering lock control unit M89.Pin 30 of A20 - connector A - i.e. the actual motor, receives a power supply with the voltage coming directly from the battery A1.The continuous current produced by the alternator A10 (pin B+) - connector B - is sent to the battery A1, passing through the motor A20.These two lines are always supplied and not protected by fuses; they are however controlled by the automatic "battery disconnection" device located in the fuse box on the battery B99: if the inertia switch I50 intervenes, a signal is sent to connector F of B99 which "opens" the device, thereby removing the power supply from the motor A20 and the alternator A10.When the alternator does not turn and therefore does not recharge the battery, an earth signal is sent from pin D+ - connector A - of A10 to the Body Computer M1 - pin 19 of connector A: this is connected via the CAN line to the instrument panel E50 and manages the switching on of the recharging warning light in the instrument panel as described above.