2012 RENAULT LAGUNA check engine

levels:coolant ............................................................. (current page)
tanks and reservoirs coolant ............................................................. (current page)
coolant ................................................................... (current page)
4.8
ENG_UD29070_5
Niveaux / filtres (X91 - B91 - K91 - Renault)
ENG_NU_936-5_BK91_Renault_4
Jaune NoirNoir texte
Levels:
engine coolant
LeVeLS (1/3)
Coolant
With the engine switched off and on
level ground, the level when cold
must be between the « MINI » A and
« MAXI » B marks on coolant reser -
voir 1.
Top this level up when cold before it
reaches the « MINI » mark. Checking intervals
Check the coolant level regularly
(very severe damage is likely to be
caused to the engine if it runs out of
coolant).
If the level needs to be topped up, only
use products approved by our Technical
Department which ensure:
–
protection against freezing;
– anticorrosion protection of the cool -
ing system.
No operations should be
carried out on the cooling
circuit when the engine is
hot.
Risk of burns.
Consult your approved dealer at
once if you notice an abnormal or
repeated drop in any of the fluid
levels.
1
Replacement intervals
Refer to the Maintenance Document for
your vehicle.
A
B
Deactivate the Stop and
Start function for any opera -
tion performed in the engine
compartment.

brake fluid .............................................................. (current page)
levels: brake fluid ........................................................ (current page)
tanks and reservoirs brake fluid ........................................................ (current page)
JauneNoirNoir texte
4.9
ENG_UD29070_5
Niveaux / filtres (X91 - B91 - K91 - Renault)
ENG_NU_936-5_BK91_Renault_4
brake fluid
LeVeLS (2/3)
Brake fluid level
The level should be read with the engine
switched off and on level ground. This
should be checked frequently, and any
time you notice even the slightest loss
in braking efficiency. Level 1
The level normally goes down at the
same time as the brake lining wear,
but it must never go below the « MINI »
warning level.
If you wish to check the disc and drum
wear yourself, you should obtain the
document explaining the checking pro-
cedure from our network or from the
manufacturer’s website.
t
opping up
After any operation on the hydraulic cir-
cuit, a specialist must replace the fluid.
Only use fluids approved by our
Technical Department (and taken from
a sealed container).
Replacement intervals
Refer to the Maintenance Document for
your vehicle.
1
The engine may be hot
when carrying out opera -
tions in close proximity. In
addition, the engine cooling
fan can come on at any moment.
Risk of injury.

battery................................................... (up to the end of the DU)
4.12
ENG_UD29071_2
Batterie (X91 - B91 - K91 - Renault)
ENG_NU_936-5_BK91_Renault_4
Jaune NoirNoir texte
Battery
BAtteR y (1/2)
The engine may be hot
during operations in close
proximity. In addition, the
engine cooling fan may
start at any moment.
Risk of injury.
Depending on the vehicle, the battery is
in the engine compartment or in the lug-
gage compartment.
It is always maintenance-free.
Depending on the vehicle, a system
continuously checks the battery charge
status. If the level drops, the message
“ Battery low start engine ” is displayed
on the instrument panel. In this case,
start the engine. Then the message
“ Battery charging ” appears on the in -
strument panel.
The charge status of your battery can
decrease especially if you use your ve-
hicle:
– for short journeys;
– for driving in town;
– when the temperature drops;
– when the radio is used for extended
periods with the engine switched off
etc.
Handle the battery with care
as it contains sulphuric acid
which must not come into
contact with the eyes or
skin. If it does, wash the affected
area with plenty of cold water. If
necessary, consult a doctor.
Ensure that naked flames, red hot
objects and sparks do not come into
contact with the battery as there is a
risk of explosion.
The battery is a specific
type , please ensure it is
replaced with the same
type. Consult an approved
dealer.
Label A
Observe the indications on the battery:
– 1 naked flames and smoking are for-
bidden;
– 2 eye protection required;
– 3 keep away from children;
– 4 explosive materials;
– 5 please consult the driver’s hand -
book;
– 6 corrosive substances.
A
123
456

JauneNoirNoir texte
5.27
ENG_UD29075_3
Batterie : dépannage (X91 - B91 - K91 - Renault)
ENG_NU_936-5_BK91_Renault_5
Battery in the engine compartment
Connect the positive cable A to the 5
support on the 1 (+) terminal, then to
the 2 (+) terminal of the battery supply -
ing the current.
Connect the negative cable B to the 6
support on the (–) terminal 3 of the
battery supplying the current and then
to the (–) terminal 4 of the discharged
battery.
BA tter Y: troubleshooting (2/2)
Starting the vehicle using the
battery from another vehicle
(continued)
Ensure that there is no risk of contact
between the two vehicles (risk of short
circuiting when the positive terminals
are connected) and that the discharged
battery is properly connected. Switch
off your vehicle ignition.
Start the engine of the vehicle supply -
ing the current and run it at an interme-
diate engine speed.
Start the engine. As soon as it is
running, disconnect leads A and B
in reverse order (5 - 4 - 3 - 2).
Check that there is no con-
tact between leads A and B
and that the positive lead A
is not touching any metal
parts on the vehicle supplying the
current.
Risk of injury or damage to the ve-
hicle.
Leads A and B must only be con-
nected to the terminals indicated.
56
14
AB
2
3

wiper blades ......................................... (up to the end of the DU)
wipers blades ............................................. (up to the end of the DU)
5.30
ENG_UD20530_1
Balais d’essuie-vitres (X91 - B91 - K91 - Renault)
ENG_NU_936-5_BK91_Renault_5
Wipers (replacing blades)
WInDScreen WIPer BLADeS
replacing windscreen wiper
blades 1
With the ignition on and engine
switched off, lower the windscreen
wiper stalk completely: they stop
slightly away from the bonnet.
Lift wiper arm 3 , pull tab 2 (move -
ment A) and push the blade upwards.
t o refit
Slide the blade along the arm until it
clips on. Make sure that the blade is
correctly locked in position. Return the
windscreen wiper stalk to the park po-
sition.– In frosty weather, make
sure that the wiper blades
are not stuck by ice (to
avoid the risk of the motor
overheating).
– Check the condition of the wiper
blades. Replace the wiper blades
as soon as they begin to lose ef-
ficiency (approximately once a
year).
Whilst changing the blade, take care
not to drop the arm onto the window
after it has been removed as this
may break the window.
Check the condition of the wiper
blades. You are responsible for their
service life:
– clean the blades, windscreen and
rear screen regularly with soapy
water;
– do not use them when the wind-
screen or rear screen are dry;
– free them from the windscreen or
rear screen when they have not
been used for a long time.
rear screen wiper blade 4
– Lift wiper arm 6;
– pivot blade 4 until some resistance is
met (movement C);
– depending on the vehicle, press
tab 5, then remove the blade by pull -
ing it (movement B).
t o refit
To refit the wiper blade, proceed in re-
verse order to removal. Make sure that
the blade is correctly locked in position.
A
1
2
3
B
4
c
5
6

JauneNoirNoir texte
5.35
ENG_UD28899_2
Anomalies de fonctionnement (X91 - B91 - K91 - D91 - X95 - B95 - D95 - \
K95 - J95 - R95 - X98 - Renault)
ENG_NU_936-5_BK91_Renault_5
OPerA tInG FAuL tS (3/5)
On the road POSSIBLe cAuSeSWHAt tO DO
Vibrations. Tyres not inflated to correct pres-
sures, incorrectly balanced or dam -
aged. Check the tyre pressures: if this is not the
problem, have them checked by an ap
-
proved Dealer.
White smoke from the exhaust. This is not necessarily a fault. Smoke
may be caused by regeneration of the
particle filter.Please refer to the information on “Special
features of diesel versions” in Section 2.
Smoke under the bonnet. Short-circuit or cooling system leak.Stop, switch off the ignition, stand away
from the vehicle and contact an approved
dealer.
The oil pressure warning light comes
on: while cornering or braking The level is too low. Top up the engine oil (refer to the informa-
tion on “Engine oil level – Topping up/refill-
ing” in Section 4).
is slow to go out or remains lit
under acceleration Loss of oil pressure.
Stop the vehicle and contact an approved
Dealer.

5.36
ENG_UD28899_2
Anomalies de fonctionnement (X91 - B91 - K91 - D91 - X95 - B95 - D95 - \
K95 - J95 - R95 - X98 - Renault)
ENG_NU_936-5_BK91_Renault_5
Jaune NoirNoir texte
OPerA tInG FAuL tS (4/5)
On the road POSSIBLe cAuSeSWHAt tO DO
Steering becomes heavy. Assistance overheating.Consult an approved dealer.
The engine is overheating. The cool-
ant temperature indicator is in the
warning zone and warning light
® comes on. Engine cooling fan not working.
Stop the vehicle, switch off the engine and
contact an approved dealer.
Coolant leaks. Check the coolant reservoir: it should con-
tain fluid. If there is no coolant, consult an
approved dealer as soon as possible.
Coolant boiling in the coolant reser -
voir. Mechanical fault: damaged cylinder
head gasket.Stop the engine.
Contact an approved dealer.
radiator:
If there is a significant lack of coolant, remember that it must never be topped up using cold coolant while
the engine is very warm. After any procedure on the vehicle which has involved even partial draining of the cooling
system, it must be refilled with a new mixture prepared in the correct proportions. Reminder: only products approved
by our Technical Department may be used for this purpose.

6.1
ENG_UD29780_15
Sommaire 6 (X91 - B91 - K91 - Renault)
ENG_NU_936-5_BK91_Renault_6
Section 6: Technical specifications
Vehicle identification plates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.2
Engine identification plates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.3
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.4
Engine specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.6
Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.7
Towing weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.7
Replacement parts and repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.8
Service sheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.9
Anti-corrosion check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.15