2009 RENAULT TWINGO charging

1Engine and peripherals
V2 MR-413-X44-16A000$TOC.mif
V2
16A
"The repair procedures given by the manufacturer in this document are based on the
technical specifications current when it was prepared.
The procedures may be modified as a result of changes introduced by the
manufacturer in the production of the various component units and accessories from
which his vehicles are constructed."
V2
All rights reserved by Renault s.a.s.
Edition Anglaise
Copying or translating, in part or in full, of this document or use of the service part
reference numbering system is forbidden without the prior written authority of
Renault s.a.s.
© Renault s.a.s. 2008
STARTING-CHARGING
New Twingo
Fault finding – List and location of components 16A - 2
Fault finding – Role of components 16A - 3
Fault finding – Operating diagram 16A - 4
Fault finding – Features 16A - 5
Fault finding – Customer complaints 16A - 6
Fault finding – Fault finding charts 16A - 7
Fault finding – Tests 16A - 16

16A-2
MR-413-X44-16A000$125.mif
V2
16A
STARTING-CHARGING
Fault finding – List and location of components
1Starter motor
2Alternator 3Passenger compartment unit UCH
1
2
New Twingo
3
MR-413-X44-16A000$125.mif

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-6
MR-413-X44-16A000$625.mif
V2
16A
STARTING-CHARGING
Fault finding – Customer complaints
STARTING
THE STARTER DOES NOT WORKALP1
THE STARTER TURNS BUT DOES NOT
ENGAGEALP2
STARTER NOISYALP3
LOW STARTER SPEEDALP4
New Twingo
MR-413-X44-16A000$625.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