alarm RENAULT TWINGO 2009 2.G Engine Starting Charging Workshop Manual

16A-3
MR-413-X44-16A000$250.mif
V2
16A
STARTING-CHARGING
Fault finding – Role of components
●Battery
The principal purpose of the battery is to provide the powerful current briefly required by the starter motor to start the
engine. For optimum starting, the current supplied by the battery must be sent to the starter motor with minimum
loss. To achieve this, the electrical connections (wires, terminals, connectors, etc.) must be in good condition.
When the engine is not running, the battery must feed the accessories that operate constantly, even with the ignition
switched off, such as the alarm, radio codes, computers, etc.
●Alternator
The alternator only operates when the engine is running. Its function is to recharge the battery, and at the same time
to supply the electrical power required to operate all the electrical accessories on the vehicle.
The alternator fitted to the New Twingo is a controlled alternator. The UCH controls the regulation by means of a
serial connection (BSS).
●UCH
The UCH is linked to the alternator by a serial connection (BSS connection). The UCH and the alternator
communicate via this connection.
The UCH intelligently manages the alternator regulation voltage according to the engine phase, battery charge and
temperature.
●Starter
This turns the engine over to make it start, and requires a very powerful electric current, which the battery must be
able to supply.New Twingo
MR-413-X44-16A000$250.mif