DescriptionThis vehicle features a CAN network (Controller Area Network) system of electrical connections: it involves a software and hardware solution which is designed to manage the resources on the vehicle in an increasingly efficient way, allowing:data to be shared between the various electronic units;the integrattion of several electronic units in one network;a high data exchange speed in the network;ensure cost-effective solutions, since the number of wiring harnesses and connectors are considerably reduced in the vehicle;a higher standard in terms of quality and reliability.The advantage of using a CAN system stems from the fact that the communication involves numerous control units and consequently the number of signals managed is very high.For this reason the signals 'travel' on CAN type (double) serial Bus, where one wire is associated with the high level (H) and the other the low level (L); These CAN Buse signals are differential, i.e. the value assigned to each bit is represented by the different voltge of CAN-H and CAN-L.The various electronic units which make up the system, known as network 'Nodes', are connected to the CAN by means of communication interfaces known as transreceivers; These connection interfaces, integrated in the actual electronic units, form the gates for sending/reading information at the CAN or at the serial lines.A 'transmission protocol', i.e. the set of rules allowing the communication between two or more ECUs (called Nodes) by means of data or data package exchanges, is required for CAN serial line data circulation.The main element in the network is the Body Computer. The Body Computer node 'wakes the system up' when the ignition key is turned to the ON position (if there is a Body Computer failure, the task of waking the system up is entrusted to other nodes 3022517Characteristic of working principle5505ELECTRICAL CIRCUIT FOR INSTRUMENTS/INDICATORS . The Body Computer also carries out the functions of controlling the network, which makes it possible to supply information on:the network activity status;the functional failure status of the individual electronic units (nodes);the possible CAN failure.The various electronic units process the signals coming from the respective sensors either for their own management or for the other control units, which arrive via the CAN network.The specific structure adopted on this vehicle consists of two CANs which connect nodes belonging to two different areas:C-CAN for 'dynamic control' of the vehicle (high speed): bus CAN-H and CAN-L;B-CAN for the management of 'bodywork functions' (low speed): bus CAN-A and CAN-B; the two CAN communication networks are connected to one another by means of a gateway for transferring joint information, located in the Body Computer Node.The following nodes are connected to the Body Computer via the C-CAN:engine management control unit;ABS control unit;'SELESPEED' gearbox control unit;steering sensor unit for VDC.The following nodes are connected to the Body Computer via the B-CAN:climate control system control unit;instrument panel;radio or radio phone-navigatorcontrol unit in driver's doorelectric rear window unit The diagnosis of the nodes connected to the bodywork network is achieved via the CAN, whilst the vehicle dynamic control network is diagnosed using the special K lines 3023651SeeE8010DIAGNOSTIC MULTIPLE CONNECTOR . The system also uses additional 'traditional' serial lines for the various connections; for example, in the connection between the Body Computer and the alarm / volumetric sensors 3023578SeeE7015ALARM . The distribution of power takes place via the junction units and/or fuse boxes, connected to the control elements (relays and static actuators) in order to ensure the maximum level of electrical protection and the minimum degree of wiring complexity 3023142SeeE1010SUPPLY .
Functional description The Body Computer M1 is supplied directly by the battery from the line protected by the maxifuse CPL ( B99 , connector B) at pin 18 of connector F of the interface with the underdashboard control unit B2 . The Body Computer M1 receives a supply controlled by the ignition (INT) at pin 9 of connector F of the interface with the underdashboard control unit B2 : this signal is designed to 'wake up the network'. Pin 10 of connector C and pin 8 of connector D M1 are earthed. The nodes connected to the Body Computer M1 via the C-CAN are:engine management control unit M10 ;ABS control unit M50 (which is not connected directly, but via M10 )'SELESPEED' gearbox control unit M54 ;steering sensor unit for VDC K58 .The following nodes are connected to the Body Computer M1 via B-CAN:climate control system control unit M70 ;instrument panel E50 ;radio or radio-phone-navigator P20 ;driver's door control unit H44 .electric rear windows unit M82 .
0Removing201Refitting213025802-7040A37fuse box cover - r r1. Disconnect the electrical connections at the front (1a, 1b, 1c,1d, 1e, 1f).2. Undo the bolts fixing the control unit.3. Undo the bolts shown fixing the dashboard cover.2004865
0Removing201Refitting211. Ensure that the ignition key is in the OFF position, then disconnectthe negative battery terminal (-).2. Open the maxi fuse box cover.3. Undo the bolts securing the 'maxi-fuse' box to the battery.4. Loosen the bolt fixing the battery terminal (+).5. Release the maxi fuse box from the battery and move it to theside.2004975
5530B14
Follow these precautions: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 further details, see DESCRIPTION ANDOPERATION - 5580.768Proceed 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 (see op.). 5530B10).If the voltage without load is over 12.10V but less than 12.50 V, recharge the battery (see op. 5530B14).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
0Removing201Refitting21Place the vehicle on a lift.Open the bonnet lid.1. Release the retainers (1a) and remove the cover (1b).2004980
5530B40
0Removing201Refitting21Open the bonnet lid.1. Release the retainers (1a) and remove the cover (1b).2004986
5530B52
0Removing201Refitting21Proceed with removal 3025534-5530B10battery - r+r .1. Remove the relay/fuse box cover.2. Undo the nut (2a) and disconnect the earth lead (2b) from therelay-fuse box.2004990
5530B60
0Removing201Refitting213025534-5530B10battery - r+r1. Remove the battery drip tray.2. Unscrew bolts (2a) and loosen bolt (2b) securing the batterycradle.3. Move the battery cradle aside.4. Release the belt retaining stud.5. Remove the belt.2005002
0Removing201Refitting211. Release the retainers for the switch panel from the dashboardtrim.2. Disconnect the electrical connections.3. Recover the switch panel.2005045
0Removing201Refitting213025620-5580E08aerial for alpha code- r r1. Disconnect the electrical connections (1a, 1b) from the ignitionswitch.2. Use a drift and undo the headless bolts (2a); remove the ignitionswitch (2b).7682004913
5520A14
769
5520A16
769
5520A18
0Removing201Refitting211. If necessary, regulate the steering wheel height adjustment lever.2. Undo the bolts fixing the lower trim.3. Remove the lower trim, releasing it from the inner retainersand the steering wheel.2004920
0Removing201Refitting211. Release and gently extract the switch unit.2. Disconnect the electrical connections.3. Recover the switch unit.2005147
7005M14
0Removing201Refitting211. Unscrew the bolt.2. Gently extract the switch unit and control unit.3. Disconnect the electrical connections (3a, 3b).4. Recover the switch unit and control unit.2005148
0Removing201Refitting21Ensure that the ignition keyis in the OFF position, then disconnect the negative battery terminal(-). Proceed with removal 3025803-7040A65passenger compartmentbox lock , one , r r .1. Undo the nuts (1a) and remove the lateral acceleration and slewsensor (1b) after disconnecting the electrical connection (1c). 2068325
0Removing201Refitting21Ensure that the ignition key is in theOFF postition, then disconnect the battery negative terminal.1. Disconnect the electrical connection from the air flow meter.2. Loosen collars (2a) and remove air flow meter (2b) after disconnectingit from the air intake sleeves.2001588
1Refitting210Removing20Refit the variable valve timing electro-magnet and secure by tightening the bolts to the recommended torque.Connect the electrical connection to thevariable valve timing electro-magnet.Proceed with the refitting 3024766-1016A40ignition coil coveron cylinder head- r+r .Connect the battery terminal (-).
1056B50
0Removing201Refitting21Ensure that the ignition key is in theOFF postition, then disconnect the battery negative terminal.1. Disconnect the electrical connection from the air flow meter.Disconnect the electrical wiring for theflow meter from the fastening on the air intake sleeve.2. Disconnect the oil vapour recirculation pipe from the air intakeduct.3. Undo the bolts (3a) and remove the air intakehouse (3b) completewith air flow meter (3c).2002026
0Removing201Refitting21Ensure that the ignition key is in theOFF postition, then disconnect the battery negative terminal.Proceed with the removal 3024766-1016A40ignition coil coveron cylinder head- r+r . Discharge the fuel supply pressure withthe tool connected to the specific valve located on the side ofthe fuel manifold pipe.1. Disconnect the electrical connections from the injectors.2. Disconnect the rapid attachment of the fuel supply front pipe,fuel manifold pipe side.3. Release the front fuel delivery pipe from the fastening on theair chamber.2001601
1056B68
0Removing201Refitting211. Remove the clips (1a) and remove the injectors (1b) from thesingle fuel manifold pipe.2. Remove the seals from the injectors.2001605
1056B70
0Removing201Refitting211. Remove the clips (1a) and remove the injectors (1b) from thesingle fuel manifold pipe.2. Remove the seals from the injector2001606
1056B78
0Removing201Refitting21Ensure that the ignition key is in theOFF postition, then disconnect the battery negative terminal.1. Disconnect the electrical connection from the switch on the clutchpedal.2. Turn the switch clockwise through 90 degrees and remove.2001607
1056B81
Make sure that the ignition key is in theOFF position.Check that the air conditioner is off andthat the accelerator pedal is never pressed.Connect the tool to the diagnostic socketand place the knob in position 3.Connect the Examiner diagnostic equipment.Place the ignition key in the ON position.Using the Examiner, enter the 'ControlUnit Test' ambient.Using the Examiner, enter the 'Active Diagnosis' ambient,then select 'Reset self-adjustment parameters' and 'Idle actuator'.Using the Examiner, press 'Carry out activediagnosis'.Place the ignition key in the OFF positionand wait for 30 seconds.Place the ignition key in the ON positionand wait for 30 seconds.Using the Examiner, re-establish the dialoguewith the engine control system.Using the Examiner, enter the 'Parameters'ambient and select the following tests from the menu - 'Idle recognitiontest - carried out' and 'Idle recognition signals - synchronized'.767If at least one of the parametersdoes not conform, place the ignition key in the OFF position andrepeat the procedure. If this non conformity persists, check thatthe diagnostic cable is correctly connected and check the operationof the instrument.Place the ignition key in the OFF positionand wait for 30 seconds.Start up the engine without acting on theaccelerator pedal.Disconnect the diagnostic equipment.Test the vehicle by driving for severalkilometres then, with the engine warmed up, check that it is idlingcorrectly.
1056B82
0Removing201Refitting21Ensure that the ignition key is in theOFF postition, then disconnect the battery negative terminal.1. Disconnect electrical connections (1a) and (1b) from the injection-ignitioncontrol unit.2. Release the electrical wiring from the fastening on the ignition/injectionsystem control unit mount.2001608
1056B87
0Removing201Refitting21Ensure that the ignition key is in theOFF postition, then disconnect the battery negative terminal.1. Disconnect electrical connections (1a) and (1b) from the injection-ignitioncontrol unit.2. Release the electrical wiring from the fastening on the ignition/injectionsystem control unit mount.2001610
1056B90
0Removing201Refitting21Position the vehicle on the ramp.Ensure that the ignition key is in theOFF postition, then disconnect the battery negative terminal.1. Disconnect the fuel vapour recirculation pipe from the air inakesleeve.2. Disconnect the intake hose from the throttle body integratedwith D.V.L. and move to one side.2001616
1056B10
0Removing201Refitting21Ensure that the ignition key is in theOFF position, then disconnect the negative battery terminal (-). Proceed with removal 3024825-1048A28vacuum air circuit resonatorpipe - r+r . 1. Disconnect the electrical connection from the air flow meter. 2. Undo the nuts (2s) and remove the brackets (2b) securing theair flow meter to the aiar filter cover.3. Remove the air flow meter (3a), complete with hose (3b).2067872
1056B62
0Removing201Refitting21Ensure that the ignition key is in theOFF position, then disconnect the negative battery terminal (-).Proceed with removal 3024979-1072B42left hand or right handinlet manifold (one) - r+r .Discharge the fuel system pressure withthe tool connected to the bleed valves on the fuel pipe.1. Disconnect the quick-release connector for the front fuel supplypipe, fuel pipe side.2. Disconnect the electrical connections from the injectors.3. Undo the bolts (3a) and remove the fuel pipe (3b) complete withinjectors (3c).769Avoid working with the engine hot underall circumstances;Never use tools such as pliers, screwdrivers,etc. under any circumstances;If it is released, rotate the rapid connectorcover before acting on the release buttons;Check its condition (deformation/breakageof retaining lugs, release buttons) before reconnecting it;After re-engageing the rapid connector,check that it is correctly attached by pulling it;At the end of fitting, check that thereare no fuel leaks by starting up the engine again;If there is damage to the rapid connector,replace the complete right pipe.2067877
1056B66
0Removing201Refitting21Ensure that the ignition key is in theOFF position, then disconnect the negative battery terminal (-).Discharge the fuel system pressure withthe tool connected to the bleed valve on the left fuel pipe.1. Disconnect the electrical connections from the left injectors.2. Disconnect the quick-release connector for the front fuel supplypipe, fuel pipe side.3. Disconnect the rapid connector from the right fuel manifold pipeto the left one.769Avoid working with the engine hot underall circumstances;Never use tools such as pliers, screwdrivers,etc. under any circumstances;If it is released, rotate the rapid connectorcover before acting on the release buttons;Check its condition (deformation/breakageof retaining lugs, release buttons) before reconnecting it;After re-engageing the rapid connector,check that it is correctly attached by pulling it;At the end of fitting, check that thereare no fuel leaks by starting up the engine again;If there is damage to the rapid connector,replace the complete right pipe.4. Undo the bolts (4a) and remove the left fuel manifold pipe (4b)complete with injectors (4c).2067878
1056B67
0Removing201Refitting21Ensure that the ignition key is in theOFF position, then disconnect the negative battery terminal (-).Proceed with removal 3024979-1072B42left hand or right handinlet manifold (one) - r+r .Discharge the fuel system pressure withthe tool connected to the bleed valve on the right fuel pipe.1. Disconnect the electrical connections from the right injectors.2. Disconnect the rapid connector connecting the right fuel manifoldpipe to the left one.769Avoid working with the engine hot underall circumstances;Never use tools such as pliers, screwdrivers,etc. under any circumstances;If it is released, rotate the rapid connectorcover before acting on the release buttons;Check its condition (deformation/breakageof retaining lugs, release buttons) before reconnecting it;After re-engageing the rapid connector,check that it is correctly attached by pulling it;At the end of fitting, check that thereare no fuel leaks by starting up the engine again;If there is damage to the rapid connector,replace the complete right pipe.3. Undo the bolts (3a) and remove the right fuel manifold pipe (3b)complete with injectors (3c).2067879
pressure pump electric control
1060G10
0Removing201Refitting213025534-5530B10battery - r+r1. Undo collar (1a) and remove the sleeve (1b) from air cleanerto flow meter.2. Disconnect the air flow meter from the underlying sleeve.3. Disconnect the electrical connection from the air flow meter.4. Remove the air flow meter.2002316
1060G14
0Removing201Refitting213025534-5530B10battery - r+rDisconnect the battery negative terminal. 1. Disconnect the water temperature sensor electrical connection.2. Undo the thermostat water temperatur sensor and remove.2002317
1060G16
0Removing201Refitting21Disconnect the battery negative (-) terminal.3025001-1016A10sound-proofing cover - r + r1. Disconnect the electrical connection from the excess pressuresensor.2. Withdraw the retaining bolt.3. Remove the excess pressure sensor2002318
1060G18
0Removing201Refitting21Disconnect the battery negative terminal.1. Disconnect the electrical connection from the fuel temperaturesensor.2. Undo and remove the fuel temperature sensor.2002319
1060G20
0Removing201Refitting21Place the car on a ramp.Disconnect the battery negative terminal.3025915-7055B54under-engine guard - r r1. Disconnect the electrical connection for the rpm sensor.2. Undo bolts (2a) and remove rpm and timing sensor (2b).2002320
0Removing201Refitting21Ensure that the ignition key is in theOFF position, then disconnect the negative battery terminal (-). Proceed with removal 3025001-1016A10sound-proofing cover- r + r . 1. Disconnect the electrical connection from the fuel pressure sensoron the fuel manifold.2. Undo and remove the fuel pressure sensor on the fuel manifold.2068090
0Removing201Refitting21Disconnect the battery negative terminal.1. Disconnect the electrical connection from the switch on the clutchpedal.2. Turn the switch clockwise through 90 degrees and remove.2002322
0Removing201Refitting21Disconnect the battery negative terminal.1. Disconnect the electrical connection from the injection electroniccontrol unit.2. Undo the retaining nuts.3. Remove the engine control unit from its seat on the strut.2002332
0Removing201Refitting21Position the vehicle on the ramp.Proceed with removal 3025534-5530B10battery - r+r .Proceed with removal 3025540-5530B52Battery DRIP TRAY/SUPPORT- R.R. .Proceed with removal 3025363-4450B10Front WHEEL (one) -R.R. .Remove the protective cap on the brakecaliper bleed valve. Connect the collection system (pipe andreservoir) to the bleed valve on the brake caliper. Operate the brake pedal until the brake-clutchfluid reservoir is empty. 1. Disconnect the electrical connection from the air flow meter. 2. Disconnect the oil vapour recovery pipe from the air intake hose.3. Slacken the bands (3a) and remove the duct from the filter tothe throttle body with integrated D.V.L. (3b) complete with airflow meter (3c).2004274
0Removing201Refitting21Proceed with the removal 3025534-5530B10battery - r+r . Proceed with the removal 3025540-5530B52Battery DRIP TRAY/SUPPORT- R.R. . 1. Disconnect the electrical connection from the A.B.S. hydraulicand electronic control unit.2. Undo the bolts (2a) and remove the ABS electronic control unit(2b).2004288
0Removing201Refitting21Ensure that the ignition key is in theOFF postition, then disconnect the battery negative terminal.1. Remove the trim, complete with CITY function selector buttonand A.S.R. off switch, from the housing in the centre console.2. Disconnect the electrical connection for the CITY function selectorbutton.Remove the trim, complete with CITY function selectorbutton and A.S.R. off switch.2003846
2127E08
Connect the Examiner diagnostic equipment.Select 'Alfa Selespeed' on the Examiner.Select 'Control Unit Test' on the Examinerand select the 'Marelli Selespeed Automatic Transmission'.Press 'Active Diagnosis' on the Examinerand select 'Service/end of line self-calibration'.Continue with the procedure on the Examiner.
2127E10
0Removing201Refitting21Ensure that the ignition key is in theOFF position, then disconnect the negative battery terminal (-). 1. Undo the nuts (1a) and remove the cover under the dashboard onthe passenger side (1b).2068266
0Removing201Refitting21Proceed with removal 3025534-5530B10battery - r+r . Proceed with removal 3025540-5530B52Battery DRIP TRAY/SUPPORT- R.R. . 1. Undo the bolts and move the clutch position sensor as necessary.2. Disconnect the electrical connection from the clutch positionsensor.3. Remove the electro-hydraulic selection gearbox position sensor.2068274
2127E50
0Removing201Refitting21Position the vehicle on the rampConnect the Examiner diagnostic equipment.Select 'Alfa 147 speed' on the Examiner.Select 'Control Unit Test' on the Examinerand select the 'Marelli Selespeed Automatic Transmission'.Press 'Active Diagnosis' on the Examinerand select 'Accumulator depressurizing'.Continue with the procedure on the Examiner.Ensure that the ignition key is in theOFF position, then disconnect the negative battery terminal (-). Proceed with removal. 3025915-7055B54under-engine guard -r r1. Disconnect the electrical connection from the electro-hydraulicgear selection hydraulic circuit pressure sensor.2. Undo and remove the electro-hydrauilc gear selection hydrauliccircuit pressure sensor.2068275
0Removing201Refitting211. Unscrew the motor retaining bolt.2. Disconnect the motor electrical connection.3. Remove the motor (3a) releasing the toothed wheel (3b) from thecam rack.2004835
0Removing201Refitting211. Unscrew the motor retaining bolt.2. Disconnect the electrical connections for the motor (2a, 2b,2c, 2d).3. Remove the motor (3a) releasing its connection (3b).2004840
0Removing201Refitting211. Release the switch unit (1a) from the retainers (1b) and extractit gently.2. Disconnect the electrical connections.3. Recover the switch unit.2005184
0Removing201Refitting213025595-5570T61multi-function aerial- r r1. Disconnect the electrical connections.2. Disconnect the aerial lead connection.3. Undo the special nut.4. Remove the aerial mount with leads.2005046
5570T61
0Removing201Refitting211. Unscrew the aerial.2005048
5570T66
0Removing201Refitting213025611-5580C18air bag module - r+r7681. Disconnect the electrical connections.2. Remove switch panel (2a) by undoing retainers (2b).2005049
5570T80
0Removing201Refitting21Use the radio removal toolssupplied.1. Fit both tools into the slots on the front of the radio and pushin until the mechanism holding the radio in place clicks open. 2005050
5570T85
0Removing201Refitting21Open the tailgate.1. Unscrew the audio CD player bolts.2005053
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