battery RENAULT TWINGO RS 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

16A-4
MR-413-X44-16A000$375.mif
V2
16A
STARTING-CHARGING
Fault finding – Operating diagram
STARTING - CHARGING FLOWCHART:
1Battery (107)
2Starter (163)
3Alternator (103)
4UCH (645)
ASupply and voltage measurement
BBSS connection (serial connection for communication between the alternator and the UCH)
CStarter control line
New Twingo
MR-413-X44-16A000$375.mif

16A-5
MR-413-X44-16A000$500.mif
V2
16A
STARTING-CHARGING
Fault finding – Features
The function of the charging circuit is to:
●Ensure electrical energy is supplied to the vehicle whilst respecting the dynamic performance constraints
of the engine and transmission assembly: the alternator resisting torques and the torque gradients
measured must be managed.
●To control alternator loading and load shedding during engine management authorisation or variation of
the electrical load.
●To ensure the quality of the on board network voltage in terms of the voltage level and variation
(voltage gradient management).
●To optimise the battery charge by applying a voltage to its terminals correlating to its initial charge status
(in sleep mode) and to its internal temperature.
●To inform the engine management about the mechanical power taken from the accessories pulley,
the alternator charge rate and the rotor excitation current value.
●To run fault finding on the charging circuit: “Battery” warning light display.
The function of the starting circuit is to:
●Start the vehicle during a starting request with the ignition key if necessary. New Twingo
MR-413-X44-16A000$500.mif

16A-7V2 MR-413-X44-16A000$750.mif
16A
New Twingo
ALP1 The starter does not work
NOTESTest the condition of the battery (see 80A, Battery).
Test the condition of the power fuse (see TEST 2).
Check that fuse F9 on component 1016 is in good condition.
Check that the engine is not jammed.
Check that the following terminals are
correctly tightened:
⇒ the battery
⇒ starter
⇒ engine earth
⇒ bodywork earth
Retighten the terminals (see MR 411, 80A,
Battery, Battery: Removal - Refitting).
Are the terminals correctly tightened?
Check that the following wires are in good
condition:
⇒ the wire connecting the battery +,
component 107, to terminal B+ of the
starter, component 163,
⇒ the wire connecting the battery - to
the bodywork earth,
⇒ the wire connecting the engine to
the bodywork earth.Repair the damaged wires and terminals. If the
connection is faulty and if there is a repair
procedure (see Technical Note 6015A, repairing
electrical wiring, wiring: Precautions for
repair), repair the wiring otherwise change the
wiring. Are the wires in good condition?
Try starting.
If the starter still does not turn, can a clicking
noise be heard when the starter is
activated?
NO
YES
NO
YES
NO
A
YES
B
STARTING-CHARGING
Fault finding – Fault finding charts

16A-8V2 MR-413-X44-16A000$750.mif
STARTING-CHARGING
Fault finding – Fault finding charts16A
New Twingo
ALP1
CONTINUED 1
With the ignition switched off, measure the voltage between the battery earth and the starter control terminal.
Voltage value?
While activating the starter, measure the
voltage between the battery earth and the
starter control terminal.Disconnect the starter control terminal wire
and measure the voltage on the wire of
connection 1A again.
Voltage value? Voltage value?
Replace the starter
(see MR 411, 16A,
Starting - Charging,
Starter: Removal -
Refitting).Replace the starter
(see MR 411, 16A,
Starting - Charging,
Starter: Removal -
Refitting).
Disconnect relay 232 on component 597 and measure the voltage
on connection 1A.
Voltage value?
Insulation fault on connection 1A between
components 232 and 163. If there is a
repair method (see Technical Note
6015A, Repairing electrical wiring,
Wiring: Precautions for repair) repair the
wiring, otherwise replace it.
A
< 1 VBetween 1 V
and 10 V≥ 10 V
≥ 10 V< 10 V
C
≥ 10 V< 10 V
< 10 V
C
≥ 10 V

16A-9V2 MR-413-X44-16A000$750.mif
STARTING-CHARGING
Fault finding – Fault finding charts16A
New Twingo
ALP1
CONTINUED 2
Measure the voltage on connection BPDA between the earth taken on one of the starter mounting points and its
B+ terminal while activating the starter.
Voltage value?
Measure the drop in voltage on connection
BPDA between the battery + terminal and
the starter B+ terminal while activating the
starter.
Replace the wire connecting the
battery + terminal to the starter.
Voltage value?
Measure the drop in voltage between the
battery - terminal and the earth on one of
the starter mounting points while activating
the starter.
Replace the earth wire(s) connecting
the engine to the battery.
Voltage value?
Replace the starter (see MR 411, 16A, Starting - Charging, Starter: Removal - Refitting).
B
> 10 VBetween 0 V and 10 V
≥ 1 V
< 1 V
≥ 1 V
< 1 V

16A-12V2 MR-413-X44-16A000$750.mif
STARTING-CHARGING
Fault finding – Fault finding charts16A
New Twingo
ALP2 The starter turns but does not engage
NOTESSpecial notes:
Disconnect the battery earth before handling.
Remove the starter (see MR 411 Mechanical, 16A, Starter: Removal - Refitting).
Check that the ring gear of the flywheel is in good condition.
Are the ring gear teeth damaged?
Replace the flywheel (see MR 411, Mechanical, 10A,
Flywheel: Removal - Refitting).
Check the condition of the starter (broken teeth or
worn gears).
Is the starter in good condition?
Replace the starter (see MR 411
Mechanical, 16A, Starter: Removal -
Refitting).
Refit the starter (see MR 411 Mechanical, 16A,
Starter: Removal - Refitting).
YESNO
NO
YES

16A-13V2 MR-413-X44-16A000$750.mif
STARTING-CHARGING
Fault finding – Fault finding charts16A
New Twingo
ALP3 The starter is noisy when starting
NOTESTest the condition of the battery (see MR 413, 80A, Battery).
Check that the noise is actually coming from the starter.
Try to start the engine.
At what point is the noise heard?
Starting phase Just after the engine has started
Check if the starter is
insufficiently secured
Is the starter correctly secured?Tighten the starter mountings (see MR 411, 16A,
Starter: Removal - Refitting).
Remove the starter and check that the centring
pin is present. Check the condition of the pinion
and check the entire ring gearInhibit the engine injection (see 13B or 17B,
Interpretation of commands), activate the
starter for 2 seconds and release the key.
Is a fault noticed?Does the starter continue to run after the key is
released?
NO
YES
YES
A
NO
B
YES
C
NO
D

16A-15V2 MR-413-X44-16A000$750.mif
STARTING-CHARGING
Fault finding – Fault finding charts16A
New Twingo
ALP4The starter rotates slowly from the outset.
The rotation speed of the starter decreases rapidly.
The starter causes the warning lights on the instrument panel to
become very dim
Applicability: All types
NOTESTest the wiring (TEST3).
Test the status of the battery (see 80A, Battery).
If the fault is still present, replace the starter (see MR 411, 16A, Starting - Charging, Starter: Removal -
Refitting).

16A-17V2 MR-413-X44-16A000$875.mif
STARTING-CHARGING
Fault finding – Tests16A
New Twingo
TEST1 Alternator supply test
NOTESTest the condition of the battery (see 80A, Battery).
Measure the voltage at the battery terminals with the engine warm and running at idle speed for 2 minutes and with
all consumers switched off.
Voltage value?
Replace the alternator (see MR 411, 16A, Starting - Charging,
Alternator: Removal - Refitting).
Visually inspect the consequences (battery condition, corrosion, etc.).
With the engine at idle speed, connect a current clamp to the alternator B+ wire, connection BPDA, with all
consumers switched off.
Current < 5 ACurrent between 5 A
and 35 ACurrent > 35A
Replace the alternator
(see MR 411, 16A, Starting -
Charging, Alternator:
Removal - Refitting).Keep the engine speed at
3000 rpm and still with no
consumers switched on.Check that there are no
electrical components
consuming an abnormal
amount of current.
Disconnect the fuses one by
one to identify the consumer.
To be examined Value of measured current?
(i 1)
< 14.8V> 14.8V
A