6014A_2005.pdf

Megane II phII 1.4 16V - Zbyt wysokie napięcie ładowania

Mam jeszcze jedną prośbę do was. Proszę o wyrozumiałość bo moja wiedza jest raczej przeciętna w tej dziedzinie. Nota z 2005 ostatnia strona, bo nie wiem czy dobrze rozumiem, mam mierzyć natężenie w przewodzie łączącym aku z altkiem? Znowu w nocie z 2007 strona 16A-31 do 32 są trochę inne wartości i pomiar też na pracującym silniku, piszą "connect a current clamp to the alternator B+ wire" chodzi o to samo co wyżej? Muszę mieć miernik cęgowy czy zwykłym mogę to zmierzyć? Z tym że jest on chyba do 20A.


Technical Note 6014A
XXXX

CHECKING THE CHARGING CIRCUIT

Information to assist you in locating faults or malfunctions in one or more
components of the charging system.
Comments and special notes on battery maintenance and protection.

77 11 332 282

Edition 3 - OCTOBER 2005

" 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. "

EDITION ANGLAISE

All rights reserved by RENAULT s.a.s.
Copying or translating, in part or in full, of this document or use of the service part
reference numbering system is prohibited without the prior written authority of
RENAULT s.a.s.

(C) Renault s.a.s. 2005

Contents
Page

16A STARTING - CHARGING
Checking the charging circuit
Description of the charging circuit
16A-1
Use of measuring instruments
16A-2
Information about batteries
16A-3
Information about alternators and starters 16A-4
Charging circuit wiring diagrams
16A-5
Customer complaints
16A-7
Fault finding chart
16A-8
Tests
16A-17

STARTING 116A
STARTING - CHARGING
Checking the charging circuit: Description of the charging circuit

16A

Purpose and components:

Wiring and connections:

The main function of the charging circuit is to produce
and distribute the electrical energy required to operate
the various electrical consumers on the vehicle
(computers, lights, etc.). It is also used to start the
engine.

In view of the currents involved, the electrical
connections must be of very high quality. The slightest
fault (connection or terminal loose or dirty, old wire,
etc.) creates electrical resistance that is not only
detrimental to the correct operation of the charging
circuit, but may also cause overheating and a fire
hazard.

The main components are a battery, an alternator and
a starter.

Power-fuse:
Battery:
The principal purpose of the battery is to provide the
powerful current briefly required by the starter to start
the engine. For optimum starting, the current supplied
by the battery must be sent to the starter with minimum
loss. To achieve this, the electrical connections (wires,
terminals, connectors, etc.) must be in good condition.

Some vehicles are fitted with a power-fuse. This highpower fuse is positioned directly after the battery to
protect all the vehicle's electrical components, even
the most powerful ones (such as the alternator or the
starter).
The power-fuse is positioned either on the positive
terminal of the battery, or in the wiring to which it is
connected.

When the engine is not running, the battery must feed
the accessories that operate permanently, even with
the ignition switched off, such as the alarm, radio
codes, computers, etc.
Note:
q A battery must always be fully charged, even
when stored.
q Always check the condition of the battery with the
Midtronics before handing back the vehicle.
Recharge the battery if necessary.

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.
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.

16A-1

STARTING - CHARGING
Checking the charging circuit: Use of measuring instruments
Voltage measurement:
Do not use needle voltmeters as they are not accurate
enough.
Preferably use instruments with a digital display which
are more accurate and better protected against
connection errors.
Use tools approved by RENAULT.

Current measurement:
It is best to use a current clamp as it does not require
the disconnection of electrical components on the
vehicle.

Test equipment:
To check the condition of the battery, use the
Midtronics R330 (ELE: 1593). Respect the conditions
of use for this tool.

16A-2

16A

STARTING - CHARGING
Checking the charging circuit: Information about batteries
Visual inspection:
q

q

q

of the mounting: the battery should be mounted
correctly (tightening torque shown in the Repair
Manual). Excessive tightening is pointless and
dangerous because it causes deformation and can
even break the battery. Conversely, insufficient
tightening gives too much play, which can cause
wear on the battery due to friction, and breakage in
an impact.
of the terminals: check that the connectors are
pushed well down and securely attached to the
battery terminals.
of the battery: check there are no cracks or breakage,
traces of acid, or sulphation of the terminals. If any of
these are present, replace the battery and clean the
surrounding area. Check that the degassing pipe
(depending on version) is correctly connected to the
battery vent.

NOTE
q All vehicles are equipped with low water
consumption batteries. Opening the battery and
topping up the electrolyte are FORBIDDEN.
q Batteries contain sulphuric acid, which is a
hazardous chemical.
q Battery charging produces hydrogen and oxygen,
which are very flammable gases and thus there is
a risk of explosion.
q Any batteries with filling plugs must not be opened
under any circumstances but replaced
immediately with Renault approved batteries.

16A

NOTE
q Simultaneous recharging of several batteries in
series or in parallel is forbidden.
q It is imperative to disconnect the battery from the
vehicle when recharging (the charging voltage can
rise to 16.5 V, which can " cook " computers).
q The site at which the charger is used should be
taken into consideration to this end (ventilation).

Battery storage:
Even when stored off the vehicle, a battery gradually
discharges, and more rapidly if the ambient
temperature is high.
For a battery to remain operational for a long time, it
must be stored at a temperature close to 15 °C and
protected from moisture. To keep the battery correctly
charged, it should be completely recharged after a
6 month period of storage.
A battery that has been stored for more than a year
must not be fitted to a vehicle.
Replacing a battery:
Always replace a battery with one that has the same
electrical and dimensional specifications.

Battery recharging:
When parked, vehicles consume power through their
permanent consumers and through any accessories
fitted as After-Sales options. To keep battery
discharging to a minimum, limit the number of times
the vehicle is started, periods with the ignition on,
doors open, etc., as much as possible.
A discharged battery must be recharged using a
Renault approved charger.
Recharging can take up to 24 hours depending on the
state of discharge of the battery.

A
B
C
D
E

16A-3

+ 12 V code
electrical capacity
position of terminals, size of tray, quality,
performance level (if shown)
Current rating for cold starting
(e.g. 042 means 420 A)
size code (LB = low height)

STARTING - CHARGING
Checking the charge circuit: Information about alternators and starters

Types of alternator:
q

q

q

16A

Information about starters:

Non-electronically-managed alternators: these are
conventional alternators which only have battery
feed and fault warning light outputs.
Non-electronically-managed alternators with DF
output (standard function on Vel Satis, Laguna,
Espace 4, Mégane, and present on some older
applications): they have one more output than
conventional non-electronically-managed
alternators. This output informs the computers about
the alternator's present charging rate.
Electronically-managed alternators (function
available from the Modus onwards): they have no
fault warning light output, or DF output, but they have
a multiplex network (BSS network) that carries the
signals relating to the operation of the alternator:
faults, charging rate, temperature, settings (output
voltage), type of alternator, etc. The output voltage
of these alternators is computer-managed via the
BSS network.

Output voltage:
For alternators which are not electrically-managed, the
alternator output voltage is 14.4 V ? 0.3 V at 20°C
(decreases with the temperature of the alternator by
approximately 10 mV/°C).
Some alternators have charging rate variation
management. When current is drawn suddenly (main
beam headlights, de-icing, etc. switched on), the
current supplied by the alternator does not change
immediately, but increases gradually. Thus, the
charging rate of these alternators can change from 0 to
100% in a few seconds (depending on the make and
the speed of rotation of the alternator). During this
transition period, the alternator's output voltage is not
stable.
Note:
Wait 20 seconds after switching any of the vehicle's
electrical consumers on or off before taking a
measurement.

16A-4

IMPORTANT
q Always disconnect the battery earth before
removing the starter.
q Do not operate the starter for a period of more than
20 seconds.
q After three attempts at starting, wait 10 minutes to
allow the starter to cool.

STARTING - CHARGING
Checking the charge circuit: Charge circuit wiring diagrams

Alternator with DF output (Mégane II):

Alternator with DF output (Espace IV P9X):

163: starter
107: battery
103: alternator
1337: USM = Protection and Switching Unit
419: climate control computer
120: injection computer
247: charging circuit fault warning light on the instrument panel

Alternator terminals:
- B +: alternator power output
- L: bulb output
- DF: output giving the alternator charge rate
- IGN: excitation control

16A-5

16A

STARTING - CHARGING
Checking the charge circuit: Charge circuit wiring diagrams

16A

Alternator with DF output (Espace IV except P9X, Vel Satis F4R and P9X, Laguna II ph2 F4R, K4M, G9T605,
G9T703, F9Q758):

Non-electronically-managed alternator (all other vehicles):

163: starter
107: battery
103: alternator
1: for Espace IV except P9X: climate control computer. For Vel Satis and Laguna II ph2: injection computer
247: charging circuit fault warning light on the instrument panel

Alternator terminals:
- B +: alternator power output
- L: bulb output
- DF: output giving the alternator charge rate

16A-6

STARTING - CHARGING
Checking the charging circuit: Customer complaints

16A

FAULT WARNING LIGHT FAULT
THE FAULT WARNING LIGHT DOES NOT COME ON WHEN THE IGNITION IS
SWITCHED ON WITH THE ENGINE OFF

ALP 1

THE FAULT WARNING LIGHT COMES ON OR THE MESSAGE 'CHARGING
CIRCUIT FAULT' APPEARS WHEN THE ENGINE IS RUNNING

ALP 2

FAULT WHEN THE STARTER IS OPERATING:
- THE SPEED OF ROTATION OF THE STARTER DROPS RAPIDLY
- THE STARTER ROTATES SLOWLY FROM THE OUTSET

ALP 3

- THE STARTER CAUSES THE WARNING LIGHTS ON THE INSTRUMENT
PANEL TO BECOME VERY DIM
THE STARTER DOES NOT RUN

ALP 4

THE STARTER TURNS BUT DOES NOT ENGAGE

ALP 5

DIFFICULT STARTING
- AFTER THE VEHICLE HAS BEEN IMMOBILE FOR SEVERAL DAYS
- AFTER FREQUENT SHORT JOURNEYS

ALP 6

- WHEN COLD

OTHER
THE ENGINE IDLE SPEED IS NOT STABLE, TENDENCY TO STALL

16A-7

ALP 7

STARTING - CHARGING
Checking the charging circuit: Fault finding charts (ALPs)

16A

The fault warning light does not come on when the ignition is
switched on with the engine off

ALP 1

Applicability: all vehicles except Laguna II and Vel Satis

Use a standard 12 V/1.2 W warning light test bulb (Important: risk of irreparable
damage to the alternator if a higher wattage bulb is used).

NOTES

Note:
On the Laguna II and Vel Satis, there is no fault warning light; it is therefore normal that it does not come on.

Switch on the + after ignition feed.
Do other warning lights come on?
yes

no

Disconnect the alternator light wire. Connect the
test bulb between this alternator terminal and the
battery + terminal.

Check that the supply fuses on the instrument panel
are in good condition.

Does the test bulb illuminate?

If the fault is still present, the charging circuit is not
the cause. Run fault finding on the instrument panel
(see the MR of the relevant vehicle, 83A,
Instrument panel ).

yes

no

Check that the alternator light
wire is in good condition.

Check that the alternator light
wire is in good condition.

Is the wire in good condition?

Is the wire in good condition?

yes

no

no

Repair the wire ( see
Technical Note 6015A).

yes

Repair the wire ( see
Technical Note 6015A).
Replace the alternator.

The charging circuit is not causing this fault. Run
fault finding on the instrument panel (see the MR of
the relevant vehicle, 83A, Instrument panel).

AFTER REPAIR

Check that the fault is no longer present.
Test the battery (T3).

16A-8

STARTING - CHARGING
Checking the charging circuit: Fault finding charts (ALPs)

16A

The fault warning light comes on or the message " Charging
circuit fault " appears when the engine is running

ALP 2

Applies to: All types

NOTES

Run a full check with the diagnostic tool before starting this test.
Check that the battery terminals are correctly tightened and in good condition (see the
MR of the relevant vehicle, 80A, Battery, Battery: Removal - refitting).
Use a standard 12 V/1.2 W warning light test bulb (Important: risk of irreparable
damage to the alternator if a higher wattage bulb is used).

Measure the voltage at the battery terminals with the engine running and all consumers switched off.
Voltage value?
& lt; 13.5 V

between 13.5 V and 14.8 V

& gt; 14.8 V
Replace the alternator.

Test the alternator
supply (T4).

Disconnect the alternator light wire.
Connect the test bulb between this alternator terminal and
the battery + terminal.
Does the test bulb illuminate?
yes
Replace the alternator.

no
Check the insulation against earth of the
alternator bulb wire (between the bulb
track with the connector disconnected
from the alternator and the chassis
earth).
If the fault is still present, test the
alternator supply (T4).

If this does not resolve the fault, run fault finding on
the instrument panel (see MR of the relevant vehicle, 83A,
Instrument panel ).

AFTER REPAIR

Check that the fault is no longer present.
Test the battery (T3).

16A-9

STARTING - CHARGING
Checking the charging circuit: Fault finding charts (ALPs)

ALP 3

- The speed of rotation of the starter drops rapidly
- The starter rotates slowly from the outset
- The starter causes the warning lights on the instrument panel
to become very dim

Applies to: All types

NOTES

Check the condition of the battery (T3).
Test the wiring (T2).

If the fault is still present, replace the starter.

AFTER REPAIR

16A

Check that the fault is no longer present.
Test the battery (T3).

16A-10

STARTING - CHARGING
Checking the charging circuit: Fault finding charts (ALPs)

ALP 4

16A

The starter does not turn

Applies to: All types

Test the condition of the battery (T3).
Check the immobiliser (see the MR of the relevant vehicle, 82 or 87).
Test the condition of the power-fuse (T1), if fitted to the vehicle.
Check that the engine is not jammed.

NOTES

Check that both the battery terminals and B + terminal
of the starter are correctly tightened.
Are the terminals correctly tightened?

no

Retighten the terminals (see the MR of the relevant
vehicle, 80A, Battery, Battery:
Removal - refitting).

no

Replace the wire connecting the + terminal
of the battery to the starter.

yes
Checkthe condition and continuity ofthe wire connecti g the
n
+ terminal of the batte
ryand the B + terminal of thestarter.
Is the wire in good condition?

yes
For the Modus, check that fuse F302 of
component 1337 is in good condition. For the
Mégane 2 or Scénic 2, check that fuse F3 of
component 1337 is in good condition.

Try starting.
If the starter still does not turn, can a clicking noise be
heard when the starter is activated?

no

AFTER REPAIR

yes

Using the diagnostic tool, check that no faults have appeared on the computers. Clear
the faults if necessary.
Check that the fault is no longer present.
Test the battery (T3).

16A-11

STARTING - CHARGING

16A

Checking the charging circuit: Fault finding charts (ALPs)

ALP 4
CONTINUED 1

- For the Modus, check that fuse F302 of component 1337 is in good condition.
- For the Mégane 2 and Scénic 2, check that fuse F3 of component 1337 is in good condition.
- For all other vehicles, check that it is only the starter which is not working. If not, check that the fuses of
component 645 are in good condition.

With the ignition off, measure the voltage between the battery earth and the DEM + terminal of the starter.
Voltage value?
<=1V

>= 10 V

Between 1 V and 10 V

Measure the voltage between the battery earth and
the DEM + termin al of the starter, when activating it.

Disconnect the DEM + wire from the starter and
measure the voltage on the wire again.

Voltage value?

Voltage value?

>= 10 V
Replace the
starter.

>= 10 V

&amp; lt; 10 V

Check that the DEM + wire is in good condition. Repair if
necessary (see Technical Note 6015A).

&amp; lt; 10 V
Replace the
starter.

If the fault is still present, check the starter
control circuit.

AFTER REPAIR

Using the diagnostic tool, check that no faults have appeared on the computers. Clear
the faults if necessary.
Check that the fault is no longer present.
Test the battery (T3).

16A-12

STARTING - CHARGING
Checking the charging circuit: Fault finding charts (ALPs)

16A

ALP 4
CONTINUED 2

Measure the voltage between the chassis earth of the starter and its B + terminal, when activating it.
Voltage value?
&amp; gt; 10 V

Between 1 V and 10 V

&amp; lt; 1V

Measurethevoltagebetweenthe+ terminalofthebatte
ry
andthe B + termina ofthe starter, whenactivatingit.
l

Replace the
wire connecting
the + terminal of
the battery to
the starter.

Voltage value?
Replace the
starter.

>=1 V

&amp; lt; 1V
Measurethevoltagebetw
eenthe-termi alofthebatte
n
ry
andthe chas s earthof the starter, whenacti atingit.
si
v

&amp; lt; 1V

AFTER REPAIR

Voltage value?

>=1V

Check the
earths of the
engine and
the battery.

Using the diagnostic tool, check that no faults have appeared on the computers. Clear
the faults if necessary.
Check that the fault is no longer present.
Test the battery (T3).

16A-13

STARTING - CHARGING
Checking the charging circuit: Fault finding charts (ALPs)

ALP 5

The starter turns but does not engage

Applies to: All types

NOTES

Disconnect the battery earth before handling.

Remove the starter (see the MR of the relevant
vehicle, 16A, Starting - charging:
Removal - refitting)

Check that the ring gear of the flywheel is in good condition.
Are the ring gear teeth damaged?
yes

no

Replace the flywheel
Check the condition of the starter
(broken teeth or worn gears).
Is the starter in good condition?
yes
Refit the starter

AFTER REPAIR

no
Replace the starter.

Check that the fault is no longer present.
Test the battery (T3).

16A-14

16A

STARTING - CHARGING
Checking the charging circuit: Fault finding charts (ALPs)

ALP 6

Difficult starting:
- After the vehicle has been immobile for several days
- After frequent short journeys
- When cold

Applies to: All types

NOTES

Check the condition of the battery (T3).

Test the alternator supply (T4).

If the fault is still present, check the wiring (T2).

If the fault is still present, the charging circuit is not
the cause. Check the ignition, preheating (diesel),
etc.

AFTER REPAIR

Check that the fault is no longer present.
Test the battery (T3).

16A-15

16A

STARTING - CHARGING

16A

Checking the charging circuit: Fault finding charts (ALPs)

ALP 7

The engine idle speed is not stable, tendency to stall

Applicability: Mégane II, Vel Satis F4R and P9X, Espace IV, Laguna II ph2 F4R, K4M, G9T605, G9T703,
F9Q758.

Check the condition of the battery (T3).
Check that the battery terminals are correctly tightened and in good condition (see the
MR of the relevant vehicle, 80A, Battery, Battery: Removal - refitting).

NOTES

Engine at idle speed, all consumers off, display the value of parameter Alternator charge signal
using the diagnostic tool.
Value of the parameter?
>= 98%

&amp; lt; 98%

Switch off the engine and connect a current clamp onto the
B + wire of the alternator. Switch on the engine again and
run it at idle speed, with all consumers switched off

The charging circuit is not causing
this fault. Check the injection, the
idle speed, etc.

Value of measured current?
>= 20 A

&amp; lt; 20 A

Check thatall the consumersaredefinitelyswitched
off.If thefault is still present, thenoneof the vehicle 's
electrical components has an abnormal
consumption. Disconnect the fuses one by one and
check the current drawn to identify which one.
Switch off the engineandcheck that the configuration of the
alternator in theProtection andSwitching Unit or the climate
control computer is correct, using the diagnostic tool.
Is the configuration correct?
yes

no

Replace
the alternator

Reconfigure the computer
correctly.

AFTER REPAIR

Using the diagnostic tool, check that no faults have appeared on the computers. Clear
the faults if necessary.
Check that the fault is no longer present.
Test the battery (T3).

16A-16

STARTING - CHARGING
Checking the charging circuit: Tests

TEST 1

16A

Test the condition of the power-fuse

Applicability: Vehicles fitted with a power-fuse

NOTES

None

With the ignition off, measure the voltage between the negative
terminal of the battery and the power-fuse output.
Voltage value?
>= 10 V

&amp; lt; 10 V
With the ignition off, measure the resistance between the
negative terminal of the battery and the power-fuse output.

The power-fuse is sound

Value of the resistance?
&amp; lt; 10 Ohm
Disconnect the B + terminal of the alternator, then measure
the resistance between the negative terminal of the battery
and the power-fuse output.

>= 10 Ohm
Replace the wiring connecting
the + terminal of the battery to
the starter.

Value of the resistance?
&amp; lt; 10 Ohm

>= 10 Ohm

Replace the
starter

Replace the
alternator
Replace the power-fuse or the wiring if integrated into it.
If the vehicle is a Modus, check that fuse F302
of component 1337 is in good condition. If the
vehicle is a Mégane 2 or a Scénic 2, check
that fuse F3 of component 1337 is in good
condition.

16A-17

STARTING - CHARGING
Checking the charging circuit: Tests

TEST 2

16A

Wiring test

Applicability: All types

NOTES

None

Check the condition of the battery terminals. Check there is no
oxidation on them. Check that the battery terminals are correctly
tightened (see the MR of the relevant vehicle, 80A, Battery, Battery:
Removal - refitting).
Are the connectors in good condition and not oxidised?

no

yes
check that there are no electrolyte leaks from the battery (cracks or
breakage). Check that the mechanical mounting of the battery is
sound (see the MR of the relevant vehicle, 80A, Battery, Battery:
Removal - refitting).
no

Is the battery in good condition?
yes

Replace the battery and
clean around where it is
located in the vehicle
(see 16A, Checking the
charging circuit,
Information on the
batteries ).

Check that all wires connecting the battery, alternator and starter are
in good condition, and that all their terminals are correctly tightened.
Are the connections in good condition?

no

yes
Check the starter or engine earths (tightness and condition of the
terminals, condition of the wires) (see Wiring Diagrams Technical
Note of the relevant vehicle)
Are the connections in good condition?
yes
Test OK

16A-18

no

Repairthedamagedwiresand
terminals (see Tech
nical
Note 6015A).

STARTING - CHARGING
Checking the charging circuit: Tests

TEST 3

16A

Battery condition test

Applicability: All types

NOTES

Switch off the ignition before carrying out this test

Find out whether the engine has run during the past hour or not.
Has the engine been running in the last hour?

no

yes

Stop the engine andswitch offtheignition.Switchonthemainbeam headlightsfor 2 minutes. Switch everything offandwaitfor 2 minut s.
e

Test the battery with the Midtronics (the information required by the Midtronics is given on the battery plate,
and see 16A, Checking the charging circuit, Information on batteries).
What message does the Midtronics display?

Battery OK + recharge, or
Charge + retest

Test the alternator supply
(T4).

Recharge the
battery (see 16A,
Checking
the charging circuit,
Information on batteries ).

Battery
good

Incorrect component or
Replace battery or
Disconnect battery

The battery is
sound.

Is this the first time this message has
appeared?

no

Was the test carried out with the battery disconnected?

yes

Replace the battery with another which has the same
electrical specifications and dimensions
(see 16A, Checking the charging circuit, Information
on batteries). Next, try starting.

no

Disconnect both terminals
of the battery.

Does the vehicle start?

yes

Test impossible

no

The battery is sound.

16A-19

yes

STARTING - CHARGING
Checking the charging circuit: Tests

TEST 4

16A

Test the alternator supply

Applicability: All types

NOTES

If the vehicle does not start, use a booster.

Engine running at idle speed, all consumers switched off.
Measure the voltage at the battery terminals.
Voltage value?

&amp; gt; 12.8 V

&amp; lt; 12.8 V

With the engine at 3000 rpm, switch on allelectrical consumers (main beam
headlights,de-icing, etc.)and measurethe voltage across the terminals of the battery.

With the engine at 3000 rpm, with all the consumers switched
off, measure the voltage across the terminals of the battery.

Voltage value?

Voltage value?

&amp; lt; 12.8 V

&amp; lt; 12.8 V

&amp; gt; 12.8 V

&amp; gt; 12.8 V

Switch off the engine and check the wiring (T2). Measure
the voltage across the battery terminals again with the
engine at idle speed, with all consumers switched off.

Switch off the engine and the electrical consumers.
Check the wiring (T2) Measure the voltage across
the battery terminals again at 3000 rpm,
with all consumers switched on.

Voltage value?
Voltage value?
&amp; gt; 12.8 V
&amp; lt; 12.8 V

&amp; lt; 12.8 V

&amp; gt; 12.8 V

The alternator is
charging the
battery correctly.

Test the alternator regulation (T5). Measure the
voltage across the battery terminals again, at idle
speed, with all consumers switched off.
Voltage value?

&amp; gt; 12.8 V

&amp; lt; 12.8 V

Check with the customer to see if electrical consumers have
been added to the vehicle.
Have electrical consumer been added?

no

Check that the alternator drive belt is in
good condition.
Is the belt in good condition?

yes
yes

Discuss the possibility of removing some
of the electrical consumers added to the
vehicle with the customer.

Replace the alte rnator andcheck that the wire for
its bulbis ingoodcondition, before reconnecting it.

16A-20

no

Replace the belt.

STARTING - CHARGING
Checking the charging circuit: Tests

TEST 5

16A

Test the alternator regulation

Applicability: All types

Carry out a battery test (T3) and leave the engine running for 10 minutes before
carrying out this test.

NOTES

Note:
Pay attention to the values of the voltages to be measured as they are not the same for the P9X.

Keep the engine speed at 3000 rpm for 1 minute, with no consumers.
Measure the voltage at the battery terminals after returning to idle speed.
Voltage value?
&amp; lt; 13.5 V

between 13.5 V and 14.8 V

&amp; gt; 14.8 V

Switch on the main beam headlights, the ventilation and the de-icing and maintain
the engine speed at 3000 rpm for 1 minute. After returning to idle speed, measure
the voltage across the terminals of the battery.
Voltage value?
&amp; lt; 13.5 V except P9X
&amp; lt; 13 V for P9X
Check that the alternator drive belt
is in good condition.
Is the belt in good condition?
no
Replace the
belt.

yes

Between 13.5 and 14.8 V except P9X
Between 13 and 14.8 V for P9X
With the ignition switched off, measure
the absolute value of the current
circulating in the wire connecting the
alternator to the + terminal of the
battery with the current clamp.
Current value?
&amp; gt; 0.5 A

<= 0.5 A
The regulator is sound

Replace the alternator.

16A-21

&amp; gt; 14.8 V


Download file - link to post