Fiat STILO 1.9 JTD 8v Fino a 04/2005 – CAN CONNECTION LINES – – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION

Wiring diagram - CAN CONNECTION LINES - Fiat STILO 1.9 JTD 8v Fino a 04/2005

CAN CONNECTION LINES - WIRING DIAGRAM Fiat STILO 1.9 JTD 8v Fino a 04/2005

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Components - CAN CONNECTION LINES - Fiat STILO 1.9 JTD 8v Fino a 04/2005

Component code	Name	Assembly reference
B2	Junction unit under dashboard
C15	Facia earth, driver''s side	-
D4	Front/engine connection	-
D4	Front/engine coupling	-
D8	Front coupling / air conditioner - with heating	-
D8	Front/air conditioning - heater coupling	-
D30	Rear coupling for /front door. driver''s side	-
D31	/Front passenger door. rear coupling	-
D31	Front passenger door/ rear coupling.	-
D47	Clock spring coupling
H1	Ignition switch
M10	Engine management ECU
M10	Engine management control unit	-
M10	Engine management control unit
M50	ABS control unit
M54	''Selespeed transmission control unit''
M64	Passive entry control unt	-
M66	Driver''s door control unit
M70	Climate control system control unit
M84	Parking sensor control unit	-
M86	Electric steering control unit
P20	Radio	5570T 3363142

Location of components - CAN CONNECTION LINES - Fiat STILO 1.9 JTD 8v Fino a 04/2005

CAN CONNECTION LINES - LOCATION OF COMPONENTS Fiat STILO 1.9 JTD 8v Fino a 04/2005

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Components - CAN CONNECTION LINES - Fiat STILO 1.9 JTD 8v Fino a 04/2005

Component code	Name	Assembly reference
B2	Junction unit under dashboard
C15	Facia earth, driver''s side	-
D4	Front/engine connection	-
D4	Front/engine coupling	-
D8	Front coupling / air conditioner - with heating	-
D8	Front/air conditioning - heater coupling	-
D30	Rear coupling for /front door. driver''s side	-
D31	/Front passenger door. rear coupling	-
D31	Front passenger door/ rear coupling.	-
D47	Clock spring coupling
H1	Ignition switch
M10	Engine management ECU
M10	Engine management control unit	-
M10	Engine management control unit
M50	ABS control unit
M54	''Selespeed transmission control unit''
M64	Passive entry control unt	-
M66	Driver''s door control unit
M70	Climate control system control unit
M84	Parking sensor control unit	-
M86	Electric steering control unit
P20	Radio	5570T 3363142

Description - CAN CONNECTION LINES - Fiat STILO 1.9 JTD 8v Fino a 04/2005

This 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 integration 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 Bus 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 the instrument panel).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 various signals coming from their sensors both for their own management and for the other control units, to which they are sent via the CANThe 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;te 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 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.The system also uses additionional ''traditional'' serial lines for the various connections; for example, in the connection between the Body Computer and the alarm / volumetric sensors.

Functional description - CAN CONNECTION LINES - Fiat STILO 1.9 JTD 8v Fino a 04/2005

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''.The pins 9 and 8 of connector M1 are earthed.The nodes connected to the Body Computer M1 via the C-CAN high-speed link are:electric steering control unit M86 ;engine management control unit M10 ;ABS control unit M50 ;Adaptive Cruise Control ECU M87 ;''SELESPEED'' gearbox control unit M54 ;steering sensor unit K58 .The following nodes are connected to the Body Computer M1 via the B-CAN low speed network:underfacia control unit B2 ;instrument panel E50 ;driver door control unit M66 , passenger door M67 ;boot control unit M63 ;Passive Entry control unit M64 ;steering lock control unit M89 ;radio controls on the steering wheel D47 ;built-in radio-phone-navigation unitparking sensor control unit M84 ;climate control system control unit M70 , (or additional heater control unit M75 );driver'' seat H66 and passenger seat H67 control units.