AUTOMOTIVE ELECTRICIANS
WIRING-DIAGRAMS

Alfa Romeo 166 2.4 JTD 20v da 03/02 a 09/03 – AIRBAG – – Euro 3 – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION

    HomeWiring Diagrams alfaAlfa Romeo 166Alfa Romeo 166 EnglishAlfa Romeo 166 2.4 JTD 20v da 03/02 a 09/03 All WIRING DIAGRAMS (English)
Download PDF file
Get access to all wiring diagrams of the carDownload PDF file
Wiring diagram
AIRBAG - Wiring diagram Alfa Romeo 166 2.4 JTD 20v da 03/02 a 09/03Get access to all wiring diagrams of the carDownload PDF file

Components
Component codeNameAssembly reference
B1Junction unit5505A
B2Dashboard junction unit (CPL)-
B2Junction unit-
B2Junction unit5505A
B99Battery fuses junction unit (CBA)5530B
C10Front left earth-
C15Facia earth, driver's side-
C21Dashboard earth on Air Bag bracket-
C21Passenger side dashboard earth-
C50Air Bag earth-
C50Side Bag earth-
D6Rear - front coupling-
D19Dashboard / battery coupling-
D60Air Bag connection-
D83CAE-i.e coupling.-
E50Instrument panel-
E50Instrument panel5560B
H1Ignition switch5520A
H75Passenger's Air Bag disablement switch5580C
K65Sensor in seat for disabling passenger Air Bag5580C
K66Sensor for driver's Side Bag5580C
K67Sensor for passenger, Side Bag5580C
M60AIR BAG control unit5580C
Q9Driver's Air Bag5580C
Q10Driver's Air Bag5580C
Q11Air Bag in dashboard (passenger side)5580C
Q20Driver's seat belt pre-tensioner7065A
Q20Driver's seat, belt pretensioner7065A
Q21Front passenger seat belt pre-tensioner7065A
Q21Front passenger, seat belt pretensioner7065A
Q21Passenger side front seat belt pretensioner7065A
Q30Driver's Side Bag-
Q31Passenger Side Bag-
Q40Driver's front window bag5580C
Q41Passenger side front window bag5580C
R10Multiple tester connection-
Location of components
AIRBAG - Location of components Alfa Romeo 166 2.4 JTD 20v da 03/02 a 09/03Get access to all wiring diagrams of the carDownload PDF file

Components
Component codeNameAssembly reference
B1Junction unit5505A
B2Dashboard junction unit (CPL)-
B2Junction unit-
B2Junction unit5505A
B99Battery fuses junction unit (CBA)5530B
C10Front left earth-
C15Facia earth, driver's side-
C21Dashboard earth on Air Bag bracket-
C21Passenger side dashboard earth-
C50Air Bag earth-
C50Side Bag earth-
D6Rear - front coupling-
D19Dashboard / battery coupling-
D60Air Bag connection-
D83CAE-i.e coupling.-
E50Instrument panel-
E50Instrument panel5560B
H1Ignition switch5520A
H75Passenger's Air Bag disablement switch5580C
K65Sensor in seat for disabling passenger Air Bag5580C
K66Sensor for driver's Side Bag5580C
K67Sensor for passenger, Side Bag5580C
M60AIR BAG control unit5580C
Q9Driver's Air Bag5580C
Q10Driver's Air Bag5580C
Q11Air Bag in dashboard (passenger side)5580C
Q20Driver's seat belt pre-tensioner7065A
Q20Driver's seat, belt pretensioner7065A
Q21Front passenger seat belt pre-tensioner7065A
Q21Front passenger, seat belt pretensioner7065A
Q21Passenger side front seat belt pretensioner7065A
Q30Driver's Side Bag-
Q31Passenger Side Bag-
Q40Driver's front window bag5580C
Q41Passenger side front window bag5580C
R10Multiple tester connection-
DescriptionThe car may be fitted with an electronically-controlled safety system that sets off the front seat belt pretensioners and the driver's air bag, passenger air bag and sidebags in the case of frontal and/or side impact of a certain severity.An electronic control unit manages the entire system by controlling all the components and activating the restraint systems (pretensioners and airbags) as necessary.The control unit has two different intervention levels:at the first level only the pretensioners are activatedthe second level the system operates both airbags and pretensioners.The control unit is located under the centre console of the vehicle and is fixed securely to the bodyshell. in this way, the deceleration sensors located inside the unit are close to the centre of gravity and measure whole car deceleration accurately.The driver's Air Bag module is located at the centre of the steering wheel; it is fitted on a tilting plate which enables the horn to be operated. The plate houses a metal container which holds the folded air bag and a gas generator that inflates the bag. A clock spring device allows the air bag module connection leads to turn with the steering wheel without the risk of breakage. The passenger Air Bag module is located in the dashboard, above the glove compartment and is fixed directly to the vehicle crossmember by means of a special bracket.The passenger Air Bag can be deactivated manually by means of a specific switch.The switch, which is ignition-activated, is located at the end of the facia on the passenger side and is accessible only with the door open. When the key is turned to OFF, the control unit also controls the activation of a passenger air bag disablement warning light on the instrument panel.The pretensioner is a device built into the front seat belt reel.They intervene, in the case of an impact of a certain magnitude, to recover the inevitable extension of the belts due to the action of the body weight, keeping the body close to the seat backrest.The control unit is self-diagnostic:it detects and memorizes any faultsit recognizes the various components and the type of faultit signals the onset of these faults via the special warning light.System activations following a particularly serious impact are memorized by the control unit.For further details, see DESCRIPTION AND OPERATION 5580E.The system control unit supply line is protected by a fuse located in the junction unit.768

AIRBAG - Description Alfa Romeo 166 2.4 JTD 20v da 03/02 a 09/03Get access to all wiring diagrams of the carDownload PDF file

767carefully observe the safety regulations when working on the airbag system. For further details see PROCEDURES 5580C'
Functional description The airbag system control unit M60 is supplied with power when the ignition switch is turned on (INT/A) at pin 5 by a line protected by fuse F2 in junction unit B1 . Pin 14 is connected to the specific earth C50 . When an impact of a set severity (determined by the control software) is detected, the control unit sends control signals to set off the modules:to driver's Air Bag Q9 , via the steering wheel clockspring Q10 (from pins 1 and 2):to passenger airbag Q11 (from pins 3 and 4);to pretensioners - left-hand Q20 (from pins 10 and 11) and right-hand Q21 (from pins 6 and 7). Pins 5 and 24 are connected to the passenger Air Bag disabling switch H75 . When the system self-diagnostic function detects a fault or an impact is detected, control unit M60 sends a signal -from pin 13 to pin 9 connector C of instrument panel E50. - to the airbag anomaly warning light. Pin 20 of M60 sends a signal to the passenger airbag disablement warning light at pin 16, connector C of instrument panel E50. These are earth signals and make the warning lights come on because the instrument panel E50 supply is controlled by the ignition (INT/A) from the line protected by fuse F1 of the junction unit B1.The red warning light is a 'smart' light; in other words, an inner control circuit causes the warning light to light up even if the connection is broken or if the circuit connecting warning light and control unit is short-circuited to earth. Pin 9 of control unit M60 is connected to pin 3 of multiple diagnosis connector R10.

Junction unit



B1A



B1A



B1A



B1A



B1A



B1A



B1A



B1A



B1A



B1A



B1A



B1B



B1B



B1B



B1B



B1B



B1B



B1B



B1B



B1B



B1C



B1C



B1C



B1C



B1C



B1C



B1C



B1C



B1C



B1C



B1C



B1D



B1D



B1D



B1G



B1E



B1E



B1E



B1E



B1E



B1E



B1E



B1E



B1F



B1F



B1F



B1F



B1F



B1F



B1F



B1F



B1F



B1F



B1F



B1H



B1H



B1H



B1H



B1H



B1I



B1I



B1I



B1I



B1I



B1I



B1I



B1I



B1I



B1I



B1I



B1X



B1A



B1A



B1A



B1A



B1A



B1A



B1A



B1A



B1A



B1A



B1A



B1B



B1B



B1B



B1B



B1B



B1B



B1B



B1B



B1B



B1C



B1C



B1C



B1C



B1C



B1C



B1C



B1C



B1C



B1C



B1C



B1D



B1D



B1D



B1G



B1E



B1E



B1E



B1E



B1E



B1E



B1E



B1E



B1F



B1F



B1F



B1F



B1F



B1F



B1F



B1F



B1F



B1F



B1F



B1H



B1H



B1H



B1H



B1H



B1I



B1I



B1I



B1I



B1I



B1I



B1I



B1I



B1I



B1I



B1I



B1X



multi-function components



5505A10


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213314824-5505A18multi-function controlunit - r r . 1. Undo the bolt (1a) and push back the junction unit as far asnecessary to disconnect the electrical connections (1b).767For precise identification ofthe electrical connections, see Wiring Diagrams Section.2. Remove the junction unit.2010592

5505A13


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21 Make sure that the ignitionis off (STOP position), then disconnect the negative battery terminal(refer to op. 33148615530B10battery - r+r ). 3315196-7040D12engine front side cover (one) lh or rh - r r (left). 3315197-7040D14engine bay rear side cover (one) lh or rh - r r (left).

5505A18


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21 Make sure that the ignitionis off (STOP position), then disconnect the negative battery terminal(refer to op. 33148615530B10battery - r+r ). 1. Unscrew bolt (1a) and open fuse access cover (1b).2. Undo the bolt (2a) and remove the integrated multiservices unit(2b) after having disconnected the electrical connections (2c),(2d), (2e), (2f) and (2g).2010595

5505A29


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Open the bonnet lid.1. Release the retainers (1a) and remove the cover (1b) for theadditional junction unit.2071293

Dashboard junction unit (CPL)



B2



B2A



B2B



B2C



B2E



B2F



B2G



B2G



B2H



B2I



B2I



B2I



B2I



B2I



B2I



B2



B2A



B2B



B2C



B2E



B2F



B2G



B2G



B2H



B2I



B2I



B2I



B2I



B2I



B2I



Battery fuses junction unit (CBA)



B99A



B99C



B99D



B99E



B99G



B99A



B99C



B99D



B99E



B99G



battery and leads



5530B10


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213314864-5530B54battery cover - r+r . Make sure that the ignition key is in theOFF position.1. Disconnect the battery negative and positive terminals.2. Undo the bolt (2a) fixing the battery retaining bracket (2b).3. Remove the battery.2010647

5530B40


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213314864-5530B54battery cover - r+r1. Press and release the retainers (1a), then remove the cover (1b)for the supply box on the battery. 2071303

5530B52


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213314864-5530B54battery cover - r+r . 3314861-5530B10battery - r+r . 1. Remove the battery fluid collection reservoir.2010648

5530B54


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Working in the luggage compartment, undo the knob for the batterycover.2. Remove the battery cover.2010650

Front left earth



C10A



C10A



C10A



C10A



C10A



C10A



C10A



C10A



C10A



C10B



C10A



C10A



C10A



C10A



C10A



C10A



C10A



C10A



C10A



C10B



Dashboard earth on Air Bag bracket



C21



C21



C21



C21



C21



C21



C21



C21



Air Bag earth



C50



C50



C50



C50



C50



C50



C50



C50



Rear - front coupling



D6C



D6C



D6C



D6C



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6B



D6B



D6C



D6C



D6C



D6C



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6B



D6B



Dashboard / battery coupling



D19



D19



D19



D19



CAE-front coupling



D83



D83



D83



D83



D83



D83



D83



D83



D83



D83



D83



D83



D83



D83



D83



D83



Instrument panel



E50A



E50A



E50A



E50A



E50A



E50A



E50A



E50A



E50A



E50A



E50A



E50A



E50B



E50B



E50B



E50B



E50B



E50B



E50C



E50C



E50C



E50C



E50C



E50C



E50C



E50C



E50C



E50C



E50D



E50D



E50A



E50A



E50A



E50A



E50A



E50A



E50A



E50A



E50A



E50A



E50A



E50A



E50B



E50B



E50B



E50B



E50B



E50B



E50C



E50C



E50C



E50C



E50C



E50C



E50C



E50C



E50C



E50C



E50D



E50D



analogue control panel



5560B06


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213314917-5560B11analogue control panel- r+r or replace . 1. At the bench, remove the bulbs from the panel using suitablepliers.2010702

5560B11


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21 Make sure that the ignitionis off (STOP position), then disconnect the negative battery terminal(refer to op. 33148615530B10battery - r+r ). Lower the steering wheel and move it back.1. Undo the bolts (1a) and remove the upper half casing for thesteering column (1b).2010703

5560B12


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21 Make sure that the ignitionis off (STOP position), then disconnect the negative battery terminal(refer to op. 33148615530B10battery - r+r ). Open the fuse carrier compartment flap.1. Using the tool (1a) and pushing the fuse carrier compartment,remove the surround (1b) complete with switches.2. Disconnect the elelectrical connections (2a), (2b) and (2c) andremove the surround complete with switches.2010706

Ignition switch



H1A



H1A



H1A



H1A



H1A



H1A



H1B



H1B



H1B



H1A



H1A



H1A



H1A



H1A



H1A



H1B



H1B



H1B



ignition switch



5520A12


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21 Make sure that the ignitionis off (STOP position), then disconnect the negative battery terminal(refer to op. 33148615530B10battery - r+r ). 3314931-5580C18air bag module - r+r . 7693315174-7040A26steering column trim - r+r . 3314624-4110A11steering wheel - r+r for replacement or check forversions with air bag . 3314902-5550A12complete stalk unit - r+r for versions with air bag . 1. Release the aerial for the electronic key from the ignition switch.2. Release the electrical wiring from the fixing band and disconnectthe electrical connection for the ignition switch.2010621

5520A14


768

Passenger's Air Bag disablement switch



H75



H75



H75



H75



H75



H75



H75



H75



H75



H75



air bag system



5580C12


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Place the steering wheel inthe centred position with the wheels straight.3314931-5580C18air bag module - r+r . 7693315174-7040A26steering column trim - r+r3314624-4110A11steering wheel - r+r for replacement or check forversions with air bag . 1. Disconnect the electrical connection for the horn.2. Remove the protection, slipping it out of its housing.3. Undo the bolts (3a) and remove the clock spring for the Air Bagsystem (3b).7682010715

5580C14


769769

5580C18


769769

5580C22


769769

5580C26


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21 Make sure that the ignitionis off (STOP position), then disconnect the negative battery terminal(refer to op. 33148615530B10battery - r+r ). 3315182-7040A45facia rh side cover - r r . 1. Remove the switch for deactivating the passenger Air Bag (1a)using the tool (1b) after having disconnected the electrical connection(1c).2010723

5580C28


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213315264-7045M10front seat heating system switch - r+r

5580C44


769769

5580C40


768

5580C50


768768

5580C52


768768

5580C81


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21 Refer to 33151727040A10instrument facia trim - r+r- 7045A10 l/h or r/h front seat (one) - r+r . 3315271-7050A20one-piece rear seat cushion - r r . 3315224-7040L40front compartment scuff strip - r r . 3315271-7050A20one-piece rear seat cushion - r r . 3315225-7040L44rear compartment scuff strip - r r . 3315216-7040H36central trim lower element - r r . 3315223-7040L20tunnel trim - r r . 3314258-1056B79injection/ignition contro unit guard - r r . 3315226-7040L50driver side foot rest - r r . 3315184-7040A65passenger compartment box lock , one , r r . 3315222-7040L10cabin floor carpet - r r . 3315217-7040H38central pillar upper element - r r . 3314930-5580C14air bag ecu - r+r . 3314940-5580C83airbag and pretensioner system wiring harness - rr or replace with facia removed .

5580C83


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21- 7045A10 l/h or r/h front seat(one) - r+r . 3315271-7050A20one-piece rear seat cushion - r r . 3315224-7040L40front compartment scuff strip - r r . 3315271-7050A20one-piece rear seat cushion - r r . 3315225-7040L44rear compartment scuff strip - r r . 3315216-7040H36central trim lower element - r r . 3315223-7040L20tunnel trim - r r . 3314258-1056B79injection/ignition contro unit guard - r r . 3315226-7040L50driver side foot rest - r r . 3315184-7040A65passenger compartment box lock , one , r r . 3315222-7040L10cabin floor carpet - r r . 3315217-7040H38central pillar upper element - r r . 3314930-5580C14air bag ecu - r+r . 1. Disconnect the electrical connections from the front seat beltpre-tensioners..2. Release the cable loom for the Air Bag system and pre-tensionersfrom the fixings, then remove it.2010730

5580C86


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21- 7045A10 l/h or r/h front seat (one) - r+r - 7045A98 front seat rear pouch panel, lh or rh - r r 3315250-7045B10l/h or r/h front seat head restraint - r+r- 7045A84 Front set BACKREST COVER - R.R. with seat removed - 7045A88 Front seat BACKREST UPHOLSTERY, left or right - R.R.with seat removed 7691. Disconnect the electrical connection for the sidebag. Take careto remove without damaging it. 2. Undo bolt (2a) and disconnect the sidebag earth cable (2b) 3. Cut the collars securing the wiring to the chassis.4. Release the sidebag module and wiring from the protective casing.5. Remove the wiring by withdrawing from its seat.2010731

Sensor in seat for disabling passenger Air Bag



K65



K65



K65



K65



K65



K65



Sensor for driver's Side Bag



K66



K66



K66



K66



K66



K66



Sensor for passenger, Side Bag



K67



K67



K67



K67



AIR BAG control unit



M60



M60



M60



M60A



M60A



M60B



M60B



M60



M60



M60



M60A



M60A



M60B



M60B



Driver's Air Bag



Q9



Q9



Q9



Q9



Q9



Q9



Q9



Q9



Driver's Air Bag



Q10



Q10



Air Bag in dashboard (passenger side)



Q11



Q11



Q11



Q11



Q11



Q11



Q11



Q11



Q11



Q11



FRONT SEAT BELTS



7065A12


WARNING: before removingand refitting pretensioners the following operations must be carriedout:Turn the key to STOP and remove.Disconnect the battery leads and insulate.Wait for 10 minutes before continuing.OBSERVE ALL SPECIFIED SAFETY RULES (see 7065A - Precautions)

7065A14


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21- 7045A10 l/h or r/h front seat(one) - r+r 1. Remove the protective cap.2. Unscrew bolt (2a) retaining the link to the seat.Cut the collars retaining the seat beltunfastened warning light wiring.Carry out this operation only on thedriver's seat.3. Remove the seat belt anchorage link.2011108

7065A18


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213315216-7040H36central trim lower element- r r3315217-7040H38central pillar upper element - r r3315215-7040H34central pillar trim - r r1. Unscrew the upper nut retaining the seat belt to the height adjustmentdevice.2. Move the belt to one side.2011109

Driver's Side Bag



Q30



Q30



Q30



Q30



Q30



Q30



Passenger Side Bag



Q31



Q31



Q31



Q31



Q31



Q31



Driver's front window bag



Q40



Q40



Passenger side front window bag



Q41



Q41



Multiple tester connection



R10



R10



R10



R10



R10



R10



R10



R10



R10



R10



R10



R10



R10



R10



R10



R10



R10



R10



R10



R10



R10



R10


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