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WIRING-DIAGRAMS

Alfa Romeo 156 2.4 JTD 20v da 04/98 a 02/99 – CENTRAL LOCKING – – Right hand drive – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION

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Alfa Romeo 156 2.4 JTD 20v da 04/98 a 02/99 – CENTRAL LOCKING – – Right hand drive – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION Download PDF file
Wiring diagram
CENTRAL LOCKING - Wiring diagram Alfa Romeo 156 2.4 JTD 20v da 04/98 a 02/99Get access to all wiring diagrams of the carDownload PDF file

-------------- solo versioni con telecomandoComponents
Component codeNameAssembly reference
B1Junction unit5505A
B5MAXI FUSE box-1-
B5MAXI FUSE-1 box-
B5MAXIFUSE box-1-
B99Maxifuse box on battery-
B99Maxifuse box on battery5530B
C20Passenger side dashboard earth5505A
C31Rear right earth5505A
D20/Rear dashboard coupling-
D20Dashboard/rear connection-
D30Rear / front door connection left-
D30Rear / front door coupling left-
D31Coupling for rear/right front door-
D31Rear coupling / front right. door-
D31Right front door rear coupling/.-
D35Rear / rear door coupling left-
D35Rear/right door connection left-
D36Rear/right door connection door-
D36Rear/right door coupling right-
H1Ignition switch5520A
I50Inertia switch1040A
I50Inertial switch1040A
M35Alarm remote control receiver5580E
M40Integrated services control unit5505A
N50Front door lock gear motor left7005N
N50Right front door lock left7005N
N51Right front door lock geared motor7005N
N51Right front door lock motor7005N
N55Left rear. door lock geared motor7010N
N55Rear door lock geared motor left7010N
N56Rear door lock geared motor right7010N
Location of components
CENTRAL LOCKING - Location of components Alfa Romeo 156 2.4 JTD 20v da 04/98 a 02/99Get access to all wiring diagrams of the carDownload PDF file

Components
Component codeNameAssembly reference
B1Junction unit5505A
B5MAXI FUSE box-1-
B5MAXI FUSE-1 box-
B5MAXIFUSE box-1-
B99Maxifuse box on battery-
B99Maxifuse box on battery5530B
C20Passenger side dashboard earth5505A
C31Rear right earth5505A
D20/Rear dashboard coupling-
D20Dashboard/rear connection-
D30Rear / front door connection left-
D30Rear / front door coupling left-
D31Coupling for rear/right front door-
D31Rear coupling / front right. door-
D31Right front door rear coupling/.-
D35Rear / rear door coupling left-
D35Rear/right door connection left-
D36Rear/right door connection door-
D36Rear/right door coupling right-
H1Ignition switch5520A
I50Inertia switch1040A
I50Inertial switch1040A
M35Alarm remote control receiver5580E
M40Integrated services control unit5505A
N50Front door lock gear motor left7005N
N50Right front door lock left7005N
N51Right front door lock geared motor7005N
N51Right front door lock motor7005N
N55Left rear. door lock geared motor7010N
N55Rear door lock geared motor left7010N
N56Rear door lock geared motor right7010N
DescriptionThe simultaneous operation of thefour lock motors takes place upon a command:from the keyfrom the front door switches (knobs);from the remote controlLock operation is controlled by the integratedservices control unit, located on the left under the dashboard.The control unit monitors lock status bymeans of signals received from switches located on the four locks(these signals are also used to time the lighting). A lock commandis issued only when all doors are properly closed and the frontlocks are released. Conversely, a release command is issued only whenthe front catches are locked. Conversely, a release command is issued onlywhen the front catches are locked. The control unit also runs a seriesof safety checks:switch position is checked at the end of each operation.If this position does not agree with the action carried out (e.g.if a door is open), a repulsion command is issued, i.e. the oppositemanoeuvre is carried out to realign all the locks.if the control unit detects too many complete, consecutivelock/release manoeuvres - at least 8 within 20 seconds - the systemcuts in to limit the manoeuvres: the system is inhibited in releaseposition for 30 seconds.if battery voltage drops below 9 V during a lock/releaseoperation, the system suspends the operation. If battery voltageis lower than 9 V at the outset, no command is issued.The door lock circuit is protected by aspecial fuse located in the junction unit.The remote control receiver has supplies(direct and controlled by the ignition) protected by two fuses locatedin the junction unit.
Functional description The integrated services control unit M40 whichmanages the operation of the central locking. The direct supply for the control unit M40 (pin8 of connector B) arrives directly from the battery via the lineprotect by maxifuse J/B2 (of B5 up to 2/99 or B99 from2/99) and fuse F8 of the junction unit B1 .; pin 13of connector B provides the reference earth. The receiver of the remote control M35 receivesa supply controlled by the ignition (INT) from the line for fuse F1 ofthe junction unit B1 and directly from the battery via theline of the maxifuse J/B1 (of B5 up to 2/99 or B99 from2/99) and fuse F10 of the junction unit B1 . The control unit M40 receives thefollowing inputs:commands coming from the front locks N50 and N51 forlocking (pin 15 of connector B) or for unlocking (pin 16 of connectorB) the doors;signals on the state of the door locks coming from thefour geared motors N50 , N51 , N55 and N56 ,respectively at pins 3 and 2 of connector B and 3 and 7 of connectorC. (3233915SeeE2510COURTESY LIGHTS).(only with remote control) the signals from the remotecontrol M35 receiver for locking (pin 6 of connector C) orfor unlocking (pin 15 of connector C); In accordance with the logic described above,the control unit M40 controls the locks: the signals forthe motors of the front doors ( N50 and N51 ) and rear doors( N55 ed N 56 ) come from pins 4 and 5 of connector B.

Junction unit



B1A



B1A



B1B



B1B



B1B



B1C



B1C



B1C



B1C



B1C



B1C



B1C



B1C



B1C



B1C



B1C



B1D



B1D



B1D



B1D



B1D



B1D



B1D



B1D



B1D



B1D



B1D



B1D



B1D



B1D



B1D



B1E



B1E



B1E



B1F



B1F



B1G



B1G



B1G



B1G



B1H



B1H



B1I



B1I



B1I



B1I



B1I



B1I



B1I



B1J



B1J



B1J



B1J



B1J



multi-function components



5505A10


769

5505A16


769

5505A18


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213238830-7040G24switch for facia compartmentlight - r+r3238829-7040G20facia compartment light bulb holder - r+r3238795-7040A31flap assembly - r r1. Undo the bolts.2. Move the integrated service control unit slightly.3. Disconnect the electrical connections (3a, 3b, 3c).2018617

5505A30


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Remove components obstractingaccess to earth carrier node.1. Unscrew screw.2. Disjoin earth carrier node.2018618

5505A38



MAXI FUSE box-1



B5A



B5B



B5B



B5B



B5B



Maxifuse box on battery



B99A



B99A



B99A



B99A



B99B



B99B



B99B



B99B



B99B



B99B



B99C



B99C



B99C



B99C



B99C



B99C



B99C



B99C



B99D



B99D



B99D



B99D



B99D



B99D



B99D



battery and leads



5530B10


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Place the car on a ramp.Undo the bolt securing the bracket on thebattery mount.Release the battery from the anchoragebracket complete with strap and remove.

5530B14


769768768

5530B18


Follow these precautions.769On batteries with an opticam hydrometer,electrolyte level and battery charge status can be monitored qualitativelyby examining the indicator colour:a light, bright colour indicates low electrolytelevel: top up with distilled water;a dark colour without a green area in thecentre indicates that the electrolyte level is correct but chargeis low: recharge the battery;a dark colour with a green area in themiddle indicates that both electrolyte level and charge status arecorrect: no action is necessary. For more details 3238420See subassembly5530 CURRENT GENERATOR . 768Proceed as follows.Check the battery voltage without loadusing the test device recommended by the Service outlets (e.g. 'MICRO360').Depending on the voltage values measured,which define the state of charge of the battery, proceed as follows: If the voltage without load is less than12.10 V, replace the battery ( 32384295530B10battery - r+r ). If the voltage without load is over 12.10V but less than 12.50 V, recharge the battery ( 32384305530B14battery - recharge ). If the voltage without load is over 12.50V, the battery is efficient.If necessary, top up the electrolyte asfollows.Carefully remove the cap strip.Top up with distilled and deionized water,taking care not to allow electrolyte to splash out.768

5530B22


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Place the car on the liftingbridge.1. Open engine compartment cap and disconnect battery negative terminal.2. Disconnect mass terminal on side member.3. Lift the car and disconnect mass terminal on gearbox.4. Lower the car again and remove battery earth lead.2018767

5030B26



5030B40


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Disconnect the battery negative terminal.1. Open the protective cover2. Loosen the nut and disconnect the ABS supply lead3. Loosen the nut and disconnect the starter motor supply lead4. Undo the clip and undo the box retaining bolts.5. Loosen the battery positive terminal nut.2018769

5530B52


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213238429-5530B10battery - r+rRelease the air duct hose from the mountingbracket on the drip tray. Remove the relay shield.1. Release the relays from the battery drip tray and remove them.2. Undo the nut fixing the air filter mounting bracket to the batterydrip tray.3. Undo the two fixing nuts (3a) and move the connections/electricalwiring mounting bracket (3b) aside.4. Release the accelerator cable from the fastening on the bracket.2018771

Passenger side dashboard earth



C20A



C20A



C20B



C20B



C20B



C20B



Rear right earth



C31



C31



C31



C31



C31



C31



C31



Front left door connection



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



Coupling for rear/right front door



D31



D31



D31



D31



D31



D31



D31



D31



D31



D31



D31



D31



D31



D31



D31



D31



Rear / rear door coupling left



D35



D35



D35



D35



D35



D35



D35



D35



Rear right door connection



D36



D36



D36



D36



D36



D36



D36



D36



Ignition switch



H1A



H1A



H1A



H1A



H1A



H1A



H1A



H1A



H1A



H1A



H1A



H1A



H1A



H1A



H1A



H1A



H1A



H1A



H1A



H1A



H1B



H1B



H1B



H1B



H1B



H1B



ignition switch



5520A12


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213238121-4110A11steering wheel - r+rfor replacement or check for versions with air bag3238793-7040A26steering column trim - r+r3238476-5550A12complete stalk unit - r+r for versions with air bag1. Disconnect electric connection from ignition switch.2. Unscrew screws (2a) and remove starter switch (2b). 2018661

5520A14


769

5520A16


769

5520A18


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Unloose fixing screws and removesteering column guide.1. Detach down-lead cable.2018668

Inertia switch



I50



I50



fuel tank and components



1040A10


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Position the vehicle on the ramp.3238808-7040B10load platform (luggage platform) trim - r+r . 3238939-7050B18rear seat arm rest - r+r . 3237518-1040A70submerged pump assembly complete with level guagecontrol - r + r . Drain the fuel from the tank using suitableequipment.Remove the handbrake bush.1. Lift up the handbrake lever (1a), loosen the adjustment nut (1b),then lower the lever.2013502

1040A14


1. Disconnect the handbrake cables (1a) from the mounting bracket(1b) and from the fastenings on the fuel tank (1c).2014028

1040A30


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Place the car on the lifting bridge.3237518-1040A70submerged pump assembly complete with level guagecontrol - r + rIntake fuel out of tank by ad-hoc tools.1. Remove plug for fuel filler pipe.2. Unscrew screws (2a) of fuel filler pipe (2b) to body.2014034

1040A40


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Open the access flap to the fuel fillerpipe cap.Undo and remove the fuel filler pipe cap.

1040A66


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21 Proceed with removal 3238808-7040B10load platform (luggageplatform) trim - r+r Proceed with removal 3238939-7050B18rear seat arm rest - r+r Proceed with removal 3238915-7050A20one-piece rear seat cushion- r r Proceed with removal 3238936-7050B10l/h or r/h head restraint(one) of rear seat - r+r Proceed with removal 3238914-7050A19rear seat squab - rr Proceed with removal 3237518-1040A70submerged pump assemblycomplete with level guage control - r + rRemove the submerged fuel pump assemblyfuel level gauge control.

1040A70


769

1040A74


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Disconnect the battery negative (-) terminal.1. Undo the bolts (1a) and remove the protection for the inertiaswitch (1b).2. Undo the bolts (2a) and move the inertia switch (2b) forwards,then remove it after having disconnected the electrical connection(2c).2013536

Alarm remote control receiver



M35



M35



M35



M35



anti-theft device



5580E08


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213238793-7040A26steering column trim- r+r3238799-7040A37fuse box cover - r r1. Disconnect the antenna connection from the power unit.2. Remove the antenna from the starting block.3. Free the cable from the check clamps.4. Remove the antenna unit.2018926

5580E12


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213238799-7040A37fuse box cover - r r1. Unscrew the shunt power unit screws .2. Remove the shunt power unit.3. Disconnect the anti-theft device power unit.4. Remove the anti-theft device power unit.5. Disconnect the electric connection.6. Disconnect thel'antenna connection.2018927

5580E18


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213238343-5040D22control (one) of airconditioner control support - arrange3238986-7065C42ashtray (one) r+r3238514-5570T80car radio unit - r+r3237934-2125C24gear lever knob - r + r3238802-7040A60under facia trim - r+r3238501-5560C51combined analogue control panel - r+r or replace1. Working from inside the facia, prise the led out of its seat.2. Disconnect the electrical connection and recover the led.2018928

5580E22


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213238843-7040H38central pillar upperelement - r r1. Prise the volumetric sensor from its seat in the pillar trim.2018930

5580E24


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213238799-7040A37fuse box cover - r r1. Disconnect electrical connections (1a), (1b).2. Undo the nut.3. Remove the switch and bridge.2018931

5580E26



5580E28



5580E30


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Open the bonnet lid and remove the buttons retaining the uppertrim using the special tool.2. Lower the upper trim and disconnect the electrical connectionfor the receiver.3. Unscrew the nuts.4. Remove the receiver.2018932

5580E34


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213238853-7040L40front compartment scuff strip - r r (right side). 3238841-7040H36central trim lower element - r r (right side). 1. Lift up the carpet slightly in the area of the tilt sensor.2. Unscrew the bolts3. Move the tilt sensor slightly and disconnect the electrical connection.2018934

5580E46


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213238964-7055B42Additional FRONT WHEELARCH (one), left or right - R.R.1. Unscrew the control unit bracket retaining nuts.2. Move control unit bracket (2a) and disconnect electrical connections(2b, 2c).3. Unscrew the nuts retaining the control unit to the bracket.4. Recover the control unit by taking off its bracket.2018935

Integrated services control unit



M40A



M40A



M40A



M40A



M40A



M40A



M40B



M40B



M40B



M40B



M40B



M40B



M40B



M40C



M40C



M40C



M40C



Front door lock gear motor left



N50A



N50A



N50B



N50B



N50C



N50C



front door central locking system



7005N20


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213238558-7005A04front side door waterguard protection - r r or replace with door panel removed3238582-7005C54front side door internal opening return mechanism(with handle) - r r for repair or replace with different version3238596-7005D24front door window rear guide - r r1. Disconnect, from the lock side, the linkage connecting to theouter handle.2. Undo the bolts.3. Move the lock over slightly.4. Disconnect the electrical connections (4a, 4b, 4c) then extractthe loc,2018988

7005N21



7005N40



7005N62



Right front door lock geared motor



N51A



N51A



N51B



N51B



N51C



N51C



Left rear. door lock geared motor



N55A



N55A



N55B



rear side door central locking system



7010N20


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213238633-7010A04rear side door waterguard protection - r r or arrange with door panel removed1. Disconnect, from the lock side, the linkage connecting to theouter handle.2. Release the rod guide springs from the door frame.3. Disconnect the rod (3a) from the idler (3b).4. Undo the bolts fixing the inner handle.5. Unscrew the catch retaining bolts. 6. Move the lock over slightly.7. Disconnect the electrical connections (7a, 7b), then extractthe lock.8. If necessary, separate the two rods from the lock.2019053

7010N21



7010N40



7010N62



7010N63



7010N68



Rear door lock geared motor right



N56A



N56A



N56B


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