DescriptionThe ignition and recharging circuit comprisesthe battery, starter motor and alternator.The starter motor consists of a direct currentmotor supplied by the battery and an excitation solenoid. When theignition key is turned to the extreme position (AVV), the starter motorwindings are supplied, producing electro-magnetic forces which rotatethe motor pinion. At the same time, the solenoid is energized andoperates the mechanism for engaging the pinion in the flywheel ringgear, thus turning over the engine.The alternator recharges the battery duringnormal engine rotation. The alterantor shaft (rotor) is turned bythe crankshaft by means of a belt. When supplied with an excitation current,the rotor sets up a magnetic field that induces an alternating currentin the fixed coil (stator). A diode rectifying bridge located onthe back of the alterator transforms the alternating current intoa direct current, which is sent to recharge the battery.A voltage regulator, also built into thealternator, maintains a constant voltage supply (about 14V) throughoutthe load and engine speed ranges.The efficiency of the recharging systemis controlled by the Body Computer, which measures the D+ signalcoming from the alternator with the engine running (rpm over 700).If a fault is detected, the relevant warninglight on the instrument panel is switched on.The Body Computer also acquires the batteryvoltage value in the 6-18V field. The information is then supplied to theCAN network for the controls unit node on the door which excludessome services in the case of a voltage drop (for example 2427936SeeE2510COURTESY LIGHTS ).
Functional description When the ignition key in the switch H1 isturned to the extreme position (START) - pin 50 - the winding ofthe solenoid - pin 50 - of the starter motor A20 is supplied. This supply comes directly from the batteryvia the line for the fuse F3 in the engine compartment junctionunit B1 . Pin 30 of A20 , the actual startermotor, receives the voltage coming directly from the battery A1 . The direct current generated by the alternator A10 (pin B+) is sent to the battery A1 , passing throughthe motor A20 . When the alternator does not turn, and sodoes not recharge the battery, an earth signal is sent from pinD+ to the Body Computer M1 - pin 19 of connector A: thisis connected via the CAN line to the instrument panel E50 andmanages, as described above, the switching on of the rechargingwarning light on the instrument panel.
0Removing201Refitting21Ensure that the ignition key is in theOFF position, then loosen the bolt and disconnect the battery negative(-) terminal.Undo the bolt and disconnect the batteryterminal (+).Undo the battery belt nut.Remove the battery.
5530B22
0Removing201Refitting212429398-5530B10battery - r+r2429401-5530B52Battery DRIP TRAY/SUPPORT - R.R.Open the bonnet lid.1. Disconnect the electrical connection (1a) from the negative batteryterminal (1b).2. Disconnect the electrical connection from the bodyshell.3. Disconnect the electrical connection from the gearbox casing.4. Keep the battery earth lead.2052930
5530B36
0Removing201Refitting21Place the vehicle on a lift.Raise the car.1. Undo the nut (1a) and disconnect the electrical connections (1b,1c) from the starter motor.2052931
5530B52
0Removing201Refitting21 Proceed with removal 2429398-5530B10battery - r+r . 1. Remove drip tray.2. Undo the fixing bolts (2a) and remove the battery cradle (2b)after releasing the electrical wiring from the bands on the cradle.2045035
0Removing201Refitting21Place the vehicle on a lift.2429398-5530B10battery - r+r1. Working through the battery compartment, undo the top startermotor bolt.2045023
0Removing201Refitting212429579-7040A30Left instrument panellower TRIM - R.R.1. Disconnect the electrical connections (1a, 1b, 1c, 1d, 1e, 1f).2. Undo the left-threaded bolt securing the facia trim mount beam.3. Undo the bolts securing the body computer/junction unit.4. Move facia trim (4a) slightly and move body computer/junctionunit (4b) downwards.5. Disconnect the electrical connections (5a, 5b, 5c).6. Recover the body computer/junction unit.2045005
0Removing201Refitting211. Disconnect electronic control unit electrical connections (1a),(1b), (1c).2. Undo the bolts.3. Recover the control unit2045007
0Removing201Refitting211. Disconnect electronic control unit electrical connections (1a),(1b), (1c).2. Undo the bolts.3. Recover the control unit2045008
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