6014A.pdf

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

EDITION ANGLAISE

"The repair procedures given by the Manufacturer in this document are based on the

technical specifications current when it was prepared.

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.

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."

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

116A

Checking the charging circuit: Description of the charging circuit 16A

STARTING - CHARGING

Checking the charging circuit: Description of the charging circuit

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:

Some vehicles are fitted with a power-fuse. This high-

power 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.

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.

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:

A battery must always be fully charged, even

when stored.

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

Checking the charging circuit: Use of measuring instruments 16A

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

Checking the charging circuit: Information about batteries 16A

STARTING - CHARGING

Checking the charging circuit: Information about batteries

Visual inspection:

NOTE

Simultaneous recharging of several batteries in

series or in parallel is forbidden.

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.

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).

The site at which the charger is used should be

taken into consideration to this end (ventilation).

of the terminals: check that the connectors are

pushed well down and securely attached to the

battery terminals.

Battery storage:

Even when stored off the vehicle, a battery gradually

discharges, and more rapidly if the ambient

temperature is high.

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.

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.

NOTE

All vehicles are equipped with low water

consumption batteries. Opening the battery and

topping up the electrolyte are FORBIDDEN.

A battery that has been stored for more than a year

must not be fitted to a vehicle.

Batteries contain sulphuric acid, which is a

hazardous chemical.

Replacing a battery:

Battery charging produces hydrogen and oxygen,

which are very flammable gases and thus there is

a risk of explosion.

Always replace a battery with one that has the same

electrical and dimensional specifications.

Any batteries with filling plugs must not be opened

under any circumstances but replaced

immediately with Renault approved batteries.

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 + 12 V code

B electrical capacity

C position of terminals, size of tray, quality,

performance level (if shown)

D Current rating for cold starting

(e.g. 042 means 420 A)

E size code (LB = low height)

16A-3

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