DescriptionThe antilock braking and anti-slip regulation systems (BOSCH 5.7 ABS with ASR) modulate brake pressure sent to the wheels to prevent loss of grip under all tyre and road surface conditions by cutting in automatically whenever one or both drive wheels begin to slip.The ASR system increases vehicle stability and active safety by controlling drive wheel slip. If slip is caused by excessive power transmission, it cuts in to reduce engine power through communication with the engine management control unit. if slip is detected at a single wheel, the system cuts in to brake the slipping wheel by acting on the modulation solenoid.ASR comes on automatically whenever the engine is started. The system can be deactivated by operating a button on the central console. When the system is off, a led on the button comes on at the same time as a warning light on the control panel.The warning light flashes when the system cuts in to notifiy the driver that the ASR system has cut in due to road surface grip conditions.The warning light comes in in fixed mode when the control unit detects an error in the ASR function. As far as the ABS function is concerned, 3361125SeeE7020ABS . From 06/03, the ASR function will be supplied only in conjunction with the ESP function 3361137SeeE7023ESP .
Functional description The ABS electronic control unit M50 is supplied (at pin 2 and 6) directly by the battery via a line protected by maxifuse F1, housed in the engine compartment junction unit B1. The ignition-operated supply (INT/A) reaches pin 23 from the line protected by the fuse F42 of under facia control unit B2 . The control unit is earthed via pins 1 and 5. The four sensors K70, K71, K75, K76 send wheel speed signals to pins 28-12, 15-16, 13-14 and 30-31 of M50 respectively. Brake pedal switch I30 sends an enablement signal to pin 14 of control unit M50 : the ABS cannot intervene unless the brake pedal is pressed. The switch I30 is supplied when the ignition is switched on (INT) from fuse F37 of junction unit B2 . The 'ASR OFF' control button on panel H35 sends a deactivation signal to pin 27 of M50 , while pin 18 viene relays a signal that turns on a led on panel H35 when the system is off. ; The switch H35 is supplied when the ignition is switched on (INT) from fuse F49 of junction unit B2. Pin 37 of M50 emits a discrete speed signal for transmission to Body Computer M1 ; the same signal is also copied to the CAN network. Pins 24 and 40 of ABS control unit M50 connect to engine control unit M10, Body Computer M1 and and instrument panel E50 to control the ABS warning light and - if the problem lies in the EBD function - the low brake fluid level and handbrake warning lights. The ASR function manages the relevant warning light as described previously. Self-diagnostic data can be read by connecting to connector C of Body Computer M1- pin 1: it receives signals from pin 11 of the control unit M50 via the special diagnostic line. 3361166SeeE8010DIAGNOSTIC MULTIPLE CONNECTOR
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Disconnect the negative battery terminal.1. Remove the junction unit protective cover.192009560
5505A35
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213363098-5530B56BATTERY DRIP TRAY COVER- R.R.Disconnect the battery negative terminal.3363361-7040A44facia lh side cover - r r1. Disconnect the front electrical connectors of the junction unitcomplete with body computer.2. Unscrew the retaining bolts.3. Remove from its seating the junction unit complete with bodycomputer.4. Disconnect the rear electrical connectors of the junction unitcomplete with body computer.2027438
5505A36
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Separate the junction unit (1a) from the body computer (1b),by releasing the retaining lugs (1c).2027440
5505A41
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213363098-5530B56BATTERY DRIP TRAY COVER- R.R.Disconnect the battery negative terminal.3363151-5580C18air bag module - r+r . 769- 4110A16 steering wheel - r r for replacement or checks forversions with airbag and manual gearbox with hydraulic selection . 1. Disconnect the electrical connectors (1a) and remove the controlunit (1b) from its seating.2027441
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Disconnect the electrical connectors (1a) and (1b).2. Undo the fixing bolts (2a) and remove the door node (2b).2027444
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213363098-5530B56BATTERY DRIP TRAY COVER- R.R.1. Release the clips and remove the protective cover for the uniton the battery.2. Undo the bolts (2a) and remove the battery fixing bracket (2b).3. Slacken the nut and disconnect the battery's negative terminal.2027495
5530B52
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Op. 5530B56 BATTERY DRIP TRAY COVER - R.R.3363098Op. 5530B10 BATTERY - R+R3363096- Disconnect the engine management unit electrical connections.Release the wiring from the retaining bands.1. Undo the rear fixing bolt (1a), release the front fastenings (1b) and place the engine compartment junction unit (1c) at the side.192008351
5530B56
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Undo the fixing bolts (1a) and remove the battery cover (1b).2027502
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213363098-5530B56BATTERY DRIP TRAY COVER- R.R.Disconnect the battery negative terminal.3363357-7040A26steering column trim - r+r1. Undo the bolts fixing the analogue instrument panel trim.2. Remove the trim under the instrument panel.3. Undo the upper bolts fixing the instrument panel to the dashboard;then partly release the panel.2027547
767 It is not possible toorder a single lock barrel or to order barrels using a single partcode. When ordering barrels, observe the special procedure illustrated 3363161See assembly5580E anti-theft device .
5520A18
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213363098-5530B56BATTERY DRIP TRAY COVER- R.R.Disconnect the battery negative terminal.3363357-7040A26steering column trim - r+r1. Disconnect the electrical connectors of the ignition block (1a)and Cruise Control (1b).2. Release the retaining clips on the ignition switch contact block.2027470
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Op. 5530B56 BATTERY DRIP TRAY COVER - R.R.3363098Disconnect the negative battery terminal.- Disconnect the negative battery terminal.1. Undo the nut (1a), loosen the bolt (1b) and place the Selespeed fluid reservoir (1c) at the side.192008257
3340A13
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Op. 5530B56 BATTERY DRIP TRAY COVER - R.R.3363098Disconnect the negative battery terminal.1. Undo the nut (1a), loosen the bolt (1b) and place the Selespeed fluid reservoir (1c) at the side.192008263
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Position the vehicle on theramp.3363098-5530B56BATTERY DRIP TRAY COVER - R.R.Disconnect the battery negative terminal.1. Disconnect the rpm sensor electrical connection.2027134
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