Fiat ULYSSE 2.2 16V JTD fino a 04/03 – ESP – – MY 2005 – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION

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ESP WIRING DIAGRAM Fiat ULYSSE 2.2 16V JTD fino a 04/03

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Components - ESP - Fiat ULYSSE 2.2 16V JTD fino a 04/03

Component code	Description	Reference to the assembly
A001	BATTERY	-
B001	ENGINE COMPARTMENT JUNCTION UNIT
B005	MAXI FUSE BOX	-
B098	ADDITIONAL FUSE BOX	-
C010	LEFT FRONT EARTH	-
C011	RIGHT FRONT EARTH	-
C012	ABS FRONT EARTH	-
C020	PASSENGER SIDE DASHBOARD EARTH	-
D001	FRONT/DASHBOARD COUPLING	-
D006	FRONT/REAR COUPLING	-
E050	INSTRUMENT PANEL
H001	Ignition switch
I030	BRAKE PEDAL SWITCH
I031	CLUTCH PEDAL SWITCH	-
I035	Safety switch on brake pedal for cruise control	-
I115	STABILITY CONTROL SYSTEM SWITCH	-
K020	LEFT BRAKE PAD WEAR SENSOR (SWITCH)
K021	RIGHT BRAKE PAD WEAR SENSOR (SWITCH)
K025	BRAKE FLUID LEVEL SENSOR (SWITCH)	-
K070	LEFT FRONT WHEEL SENSOR FOR ABS
K071	RIGHT FRONT WHEEL SENSOR FOR ABS
K075	LEFT REAR WHEEL SENSOR FOR ABS
K076	RIGHT REAR WHEEL SENSOR FOR ABS
M001	BODY COMPUTER
M010	ENGINE MANAGEMENT CONTROL UNIT
M050	ABS CONTROL UNIT
M80	CENTRAL DOOR LOCKING CONTROL UNIT	-
M091	SLEWING CONTROL UNIT	-
M093	STEERING WHEEL NODE CONTROL UNIT (NVO)
M140	WARNING LIGHTS AND MILOMETER CONTROL UNIT (NSO)	-
R010	MULTIPLE DIAGNOSTIC COUPLING	-

ESP COMPONENT LOCATION Fiat ULYSSE 2.2 16V JTD fino a 04/03

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Component code	Description	Reference to the assembly
A001	BATTERY	-
B001	ENGINE COMPARTMENT JUNCTION UNIT
B005	MAXI FUSE BOX	-
B098	ADDITIONAL FUSE BOX	-
C010	LEFT FRONT EARTH	-
C011	RIGHT FRONT EARTH	-
C012	ABS FRONT EARTH	-
C020	PASSENGER SIDE DASHBOARD EARTH	-
D001	FRONT/DASHBOARD COUPLING	-
D006	FRONT/REAR COUPLING	-
E050	INSTRUMENT PANEL
H001	Ignition switch
I030	BRAKE PEDAL SWITCH
I031	CLUTCH PEDAL SWITCH	-
I035	Safety switch on brake pedal for cruise control	-
I115	STABILITY CONTROL SYSTEM SWITCH	-
K020	LEFT BRAKE PAD WEAR SENSOR (SWITCH)
K021	RIGHT BRAKE PAD WEAR SENSOR (SWITCH)
K025	BRAKE FLUID LEVEL SENSOR (SWITCH)	-
K070	LEFT FRONT WHEEL SENSOR FOR ABS
K071	RIGHT FRONT WHEEL SENSOR FOR ABS
K075	LEFT REAR WHEEL SENSOR FOR ABS
K076	RIGHT REAR WHEEL SENSOR FOR ABS
M001	BODY COMPUTER
M010	ENGINE MANAGEMENT CONTROL UNIT
M050	ABS CONTROL UNIT
M80	CENTRAL DOOR LOCKING CONTROL UNIT	-
M091	SLEWING CONTROL UNIT	-
M093	STEERING WHEEL NODE CONTROL UNIT (NVO)
M140	WARNING LIGHTS AND MILOMETER CONTROL UNIT (NSO)	-
R010	MULTIPLE DIAGNOSTIC COUPLING	-

The vehicle is fitted with an ABS braking system which prevents the wheels from locking during braking, makes the best possible use of the grip conditions available and keeps the vehicle as easy as possible to control during emergency braking.The ABS is an additional part of the basic braking system; it is disabled if there is a problem, with the braking system working the same way as for a vehicle without ABS.The advantage of ABS over conventional systems is that it makes it possible to maintain maximum manoeuvrability even when braking hard in poor grip conditions, preventing the wheels from locking.The system is completed by the EBD system (Electronic Brake Distributor) which distributes the brake force by means of the ABS sensors and control unit.The "ABS failure" warning light and the "minimum brake fluid level" warning light coming on simultaneously with the engine running means that there is a problem with the EBD system; in this case, the wheels could lock during sharp braking.The "ABS failure" warning light coming on by itself with the engine running usually means that there is a problem with the ABS only.In this case, the braking system will work properly, just without the anti-lock function.The operation of the EBD system may also be affected under these circumstances.If the "minimum brake fluid level" warning light only comes on, this means that the hydraulic system fluid level is too low.On this version, the system also includes the ESP function.ESP (Electronic Stability Program) is an electronic system that controls the stability of the vehicle, intervening on the engine torque and introducing differentiated braking for the wheels in the case of a loss of grip restoring the vehicle to the correct path.Whilst driving the vehicle is subject to lateral and longitudinal forces which can be controlled by the driver as long as the tyres hold the road sufficiently well; when this is no longer the case, the vehicle starts to drift from the desired path. Especially when driving on uneve road surfaces (such as cobblestones or where there is water, ice or soil), changes in speed (during acceleration or braking) and/or trajectory (bends or the need to avoid obstacles) can cause a loss in grip for the tyres.When the sensors detect conditions that could lead to the vehicle slipping, the ESP system intervenes on the engine and the brakes producing a stabilizing torque.The ESP system switches on automatically each time the engine is started up; it can be switched off and switched back on again manually by pressing the button on the left side of the dashboard.The basic ESP system components are:the electronic control unit;the angular sensor detecting the position of the steering;four sensors which detect the rotation speed of each wheel (ABS sensors);the braking system pressure sensor;the slewing sensor which detects the rotation of the vehicle around the vertical axis;the sensor which detects lateral acceleration (centrifugal force).Depending on the version, the system also includes other auxiliary functions:TC (Traction Control) and ASR (Anti Slip Regulation) incorporated in the ESP system, control the vehicle traction and intervene automatically each time either one or both of the drive wheels are slipping, respectively.Depending on the slipping conditions, two different control systems can be activated:if the slipping involves both drive wheels, caused by the excessive force transmitted, the ASR function intervenes, reducing the power transmitted by the engine;if the slipping only involves one of the drive wheels, the TC function intervenes, automatically braking the wheel that is slipping, with a similar effect to that of a self-locking (limited-slip) differential.The MBA (Mechanic Brake Assistance) and HBA (Hydraulic Brake Assistance) functions are systems that provide an automatic increase in the braking pressure in emergency braking conditions. In effect, in critical situations, when the driver operates the brake pedal decisively, the system intervenes on the braking circuit, increasing braking pressure to ensure that the vehicle stops as quickly as possbile.The two systems behave in the same way, the only difference being that the pressure increase setting in one case is regulated by the ABS - ESP system control unit and in the other case in a mechanical fashion.The MSR function (Motor Schleppmoment Regelung) completes the system. This function automatically regulates the engine braking torque whilst changing down; if there is a sudden gear change down, it intervenes, supplying torque to the engine to prevent excessive drive at the drive wheels which, especially in poor grip conditions, could lead to a loss in stability of the vehicle.

The ESP function is managed by ABS/ESP control unit M050.Control unit M050 is supplied at connector A from engine compartment control unit B001:- at pin 2, by a line protected by fuse MF2 from pin 2 of connector D;- at pin 28, by a line protected by fuse F07 from pin 3 of connector F;Control unit M050 communicates via the CAN line (pins 25 and 45, 14 and 25 connector A) with the body computer node M001) (pins 2 and 4, 25 and 27 connector E, pins 8 and 10 connector D), with engine control unit M010 (pins A3 and A4 connector A), with steering wheel node control unit M093 (pins 1 and 2), with yaw control unit M091 (pins 2 and 3), with instrument panel E050 (pins 6 and 12), with warning light and odometer control unit M140 (pins 2 and 5) and with engine compartment control unit B001 (pins 11 and 12 connector F).Control unit M050 (pins 26-5, 9-10, 6-27, 8-29 connector A respectively) controls the speed of each wheel via left front wheel sensor K070 (pin 1 and 2), right front wheel sensor K071 (pins 1 and 2), left rear wheel sensor K075 (pins 1 and 2) and right rear wheel sensor K076 (pins 1 and 2).Pin 33 of connector A of control unit M050 is connected to pin 14 of door lock control unit M080.The yaw sensor is built into control unit M050, which activates the stability control system when a vehicle stability situation is detected (understeer or oversteer).Left brake wear sensor K020 and right brake wear sensor K021 (pin 1 connector A) send an earth signal to control unit M050 (pin 31 connector A).Brake fluid level signal sensor K02 (pin 1) is connected to M050 (pin 17 connector A), which sends signals (via the CAN line) to control units E050 and M140.Instrument panel E050 (pin 13) and warning light and odometer control unit M140 (pin 4) are supplied by body computer node M001 (pin 6 connector D) via a line protected by fuse F14.The ESP system may be cut out by pressing switch I115:- the power (pin 4) is supplied by body computer node M001 (pin 7 connector D).- the cut-out signal (pin ) reaches instrument panel E050 (pin 4).767There is a second "redundant" switch on the brake pedal used, in particular, by the engine management control unit and the ABS control unit. The "basic" switch (I030) is the "normally open" type (when the pedal is pressed, the switch closes), whilst the "redundant" switch (I035) is the "normally closed" type (when the pedal is pressed, the switch contact opens): the system checks the consistency of the "pedal pressed" information in this way.The brake pedal pressed signal reaches brake pedal switch I030:- pin 1 is connected via a line protected by fuse F31 to pin G31 of connector G of supplementary fuse box B098;- pin 2 is connected to pin 4 of connector B of body computer node M001 and with pin 30 of connector A of control unitM050.Pin 1 of redundant switch I035 is connected to pin 20 of connector F of engine compartment junction unit B001 via a line protected by fuse F06, while pin 2 is connected to pin E4 of connector A of control unitM010.Pin 2 of clutch pedal switch I031 is connected to pin E3 of connector A of control unit M010 and pin 1 is connected to pin 9 of connector B of M001. Body computer M001 is connected via the latter pin also to pin 4 of M091.Lastly, pin 1 of connector G of M001 is connected to pin 4 of connector D of M093.Control unit M050 (pin 11 connector A) is equipped with a self-diagnostic function: The control unit autodiagnostic data can be read by connecting to connector R010 (pin 12).