DescriptionThe antilock braking and anti-slip regulationsystems (BOSCH 5.7 ABS with ASR) modulate brake pressure sent tothe wheels to prevent loss of grip under all tyre and road surfaceconditions by cutting in automatically whenever one or both drivewheels begin to slip.The ASR system increases vehicle stabilityand active safety by controlling drive wheel slip. If slip is causedby excessive power transmission, it cuts in to reduce engine powerthrough communication with the engine management control unit. ifslip is detected at a single wheel, the system cuts in to brakethe slipping wheel by acting on the modulation solenoid.ASR comes on automatically whenever theengine is started. The system can be deactivated by operating abutton on the central console. When the system is off, an LED onthe button comes on at the same time as a warning light on the controlpanel (speedometer module).The warning light flashes when the systemcuts in to notifiy the driver that the ASR system has cut in dueto road surface grip conditions.The warning light comes in in fixed modewhen the control unit detects an error in the ASR function. For more details 3232922Characteristic of working principle3340A(B.S. ANTI-LOCK BRAKINGSYSTEM .) . The supply lines to the control unit andthe various system components (sensors and actuators) are protectedby a specific maxifuse and by a fuse located in the additional fusebox.
Functional description ABS electronic control unit M50 issupplied (at pins 2 and 6) directly by the battery via a line protectedby the ABS maxifuse, located directly on the battery A1 -connector C. The supply controlled by the ignition (15/54)reaches pin 23 from the line protected by fuse F6 of theadditional fuse box B98 A . The control unit is earthed via pins 1 and5. The four sensors K70, K71, K75, K76 sendwheel speed signals to pins 12-28, 16-15, 14-13 and 30-31 of M50 respectively. Brake pedal switch I30 sends a 'pedaldepressed' enablement signal to pin 32 of control unit M50 :the ABS cannot intervene unless the brake pedal is pressed. The control unit M50 receives a 'pedal released'signal, always double switch, at pin 20. The 'ASR OFF' control button on panel H35 sendsa deactivation signal to pin 28 of M50 , while pin 27 relaysa signal that turns on an LED on panel H35 when the systemis off. If the control unit M50 detects problemsrelating to the ABS function, it sends the speedometer instrument E10 asignal from pin 22, which lights up the 'ABS failure' warning light;the lighting up of the 'ASR' warning light is also managed via thesame line; if the problems concern the EBD function, the handbrake warninglight is lit up from pin 38 of M50 .; these are earth signals,and they cause the warning lights to come on because the instrument E10 supplyis controlled by the ignition (INT) from the line protected by fuseF4 of the additional fuse box B99B . Pin 37 of M50 produces a speedometersignal (average speed of all four wheels) which is sent to the instrument panel E103234310SeeE4021SPEEDOMETER . The autodiagnostic data can be read by connectingto connector R10 : it receives signals from pin 11 of thecontrol unit M50 via the special diagnostic line. The CAN line that connects M50 (frompins 24 and 40) to M10 allows the ASR function to notifythe engine management control unit of excessive engine power; thisline is not direct, but passes through the steering sensor K583234515SeeE5030PETROL ENGINE ELECTRONIC MANAGEMENT , 3234559SeeE5050DIESEL ENGINES ELECTRONIC MANAGEMENT .
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Unscrew the screw.2. Remove the frame (2a) and take it off the check clamps (2b).3. Unscrew the screws.4. Remove the speedometer/odometer (4a) from from support and moveit.5. Disconnect the electric connections (5a, 5b).2018847
5560B03
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Unscrew the screw.2. Remove the frame (2a) and take it off the check clamps (2b).3. Unscrew the screws.4. Extract the speedometer (4a) from the support (4b) e move it.5. Disconnect the electric connections (5a, 5b).2018848
5560B06
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21For the replacement of lampsof the speedometer/odometer proceed as follows.3238496-5560B02kilometre/mileometer - r r1. Turn and remove the lamp holder of the instrument lamp (1a) orthe lamp holder of the display lamp (1b).2. Remove the lamp from lamp holder. Pressure joint.2018849
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Unscrew the clamping screws of the collar badge.2. Take the collar badge off.3. Unscrew the clamping screws of the fog lamp.4. Extract the fog lamp (4a) and disconnect the electrical connection(4).2018822
5540D14
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Place the car on the auto lift.1. Turn anticlockwisely the lid and move it lightly.2. Take the check tong off.3. Extract the light.7694. Disconnect the light(4a) from the electrical connection (4b).2018823
5540D18
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213238851-7040L28tunnel switch panel- r r1. Unscrew the bolts2. Remove the switch2018825
5540D38
Prearrange the carcomplete of spare wheel, tools, supply liquids, stock fuel.Check that the tire pressure is correct.Set the switch of the command for the headlightposition on "O". Lay the car on a flat ground, orientedperpendicularly to a screen or opaque surface, at the distance of10 metres, on which there is a line that corresponds to the heightfrom the ground (A) of the centre of the fog lamps.1. Switch on the fog lamps and operate on the adjustment screw sothat the boundary line between the dark area and the area lightedby the beam is situated at the height B = (2/3 A-11) cm.2018827
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Disconnect the electrical connection.2. Turn IU+2019 switch (2a) anticlockwisely of about 60° and extractit.To make the opening easier operate by a wrench on the exagonalsection (2b) of the IU+2019 switch. 2018839
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Open the boot lid, turn and undo the lower studs securing theupper trim.2. Lower upper trim (2a) and unscrew knob (2b) securing the thirdbrake light.3. Prise out the brake light and remove.4. Prise electrical connection (4a) out of support (4b) and disconnect.Recover the light cluster.2018841
5550D17
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213238489-5550D16third stop light - r+r1. Unscrew the bolts and remove the mount from the light.2. Undo the bolts.3. Remove the bulb holder.4. Remove the bulbs (press-fit type)2018843
5550D18
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213238117-3380A44handbrake/linkage protection- r+r1. Unscrew the screw.2. Move IU+2019switch.3. Disconnect the electrical connection and recover IU+2019switch.2018844
5550D22
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Place the car on an auto lift.1. Lift the car and disconnect the electrical connection of thereserving light switch.2. Unscrew and take the reserve light switch off.2018845
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Ensure that the ignition key is in theOFF postition, then disconnect the battery negative terminal.1. Release the buttons (1a) and remove the right console closingdevice (1b).2017928
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213238429-5530B10battery - r+r1. Drain the brake-clutch fluid from the reservoir using a suitablesyringe.2. Disconnect the air inlet pipe from the inlet manifold.2017884
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Disconnect the battery negative(-) terminal. 1. Disconnect the electrical connection for one of the front wheelrpm sensors.2. Undo the bolt (2a) and remove one of the the front wheel rpmsensors (2b) complete with electrical wiring.2017900
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Disconnect the battery negative(-) terminal. 1. Disconnect the electrical connection for one of the rear wheelrpm sensors.2. Undo the bolt (2a) and remove the rpm sensor for one of the rearwheels (2b) complete with electrical wiring.2017901
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