2018 RENAULT MASTER cooling

5.22
Cornering lights(depending on the vehicle)
Remove cover D and turn bulb holder 5
a quarter turn.
Bulb type: H7.
Note: once the bulb has been replaced,
ensure the cover is refitted correctly.Dipped beam headlights
Remove cover E and turn bulb holder 6
a quarter turn.
Bulb type: H7LL.
Do not touch the bulb glass. Hold it
by its base.
Note: once the bulb has been replaced,
ensure the cover is refitted correctly.
Main beam headlights
Remove cover C.
Unclip the springs 4 and remove the
bulb holder 3.
Bulb type: H1.
Note: once the bulb has been replaced,
ensure the cover is refitted correctly.
The bulbs are under pres-
sure and can break when
replaced.
Risk of injury.
To comply with current legislation,
or as a precaution, you can obtain
an emergency kit from an approved
dealer containing a set of spare
bulbs and fuses.
HEADLIGHTS: changing bulbs (2/2)
C
D
E
3
5
6
4
Please note when work-
ing close to the engine that
it may be hot. In addition,
the engine cooling fan may
start at any moment. The

warning light in the engine compart-
ment reminds you of this.
Risk of injury.Before performing any
action in the engine com-
partment, the ignition must
be switched off (please see
the information on “Starting, stop-
ping the engine” in Section 2).

5.30
Fuses in the engine
compartment
Removing fuse box C
Remove screw 2 and remove coolant
reservoir 3. Unscrew the four screws
4.Turn unit 5 over to access the fuses in
the engine compartment.
To identify the fuses, refer to the fuse
allocation label (see the next page for
details), located on unit 5.
FUSES (3/5)
2
3
C4
4
5
No operations should be
carried out on the cooling
circuit when the engine is
hot.
Risk of burns.
Check that no water or dust enters
unit 5 when it is being removed/re-
fitted.
Deactivate the Stop and
Start function for any opera-
tion performed in the engine
compartment.
Please note when work-
ing close to the engine that
it may be hot. The engine
cooling fan may also start
at any moment. The
 warning
light in the engine compartment re-
minds you of this.
Risk of injury.

5.33
Connecting a battery charger
The battery charger must be com-
patible with a battery with nominal
voltage of 12 volts.
Do not disconnect the battery when the
engine is running. Follow the instruc-
tions given by the manufacturer of
the battery charger you are using.
When many accessories are fitted to
the vehicle, have them connected to
the + after ignition feed .
BATTERY: troubleshooting (1/2)
To avoid all risk of sparks:
– Ensure that any consumers (cour-
tesy lights, etc.) are switched off
before disconnecting or reconnect-
ing the battery;
– when charging, stop the charger before connecting or disconnecting
the battery;
– to avoid creating a short circuit be- tween the terminals, do not place
metal objects on the battery;
– always wait at least one minute after the engine has been switched off
before disconnecting a battery;
– make sure that you reconnect the battery terminals after refitting.
Special procedures may be
required to charge some
batteries. Contact your ap-
proved dealer.
Avoid all risk of sparks which may
cause an immediate explosion, and
charge the battery in a well venti-
lated area. Risk of serious injury.
Handle the battery with care
as it contains sulphuric acid,
which must not come into
contact with 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.
Please note when working close to
the engine that it may be hot. In ad-
dition, the engine cooling fan may
start at any moment. The

warning light in the engine compart-
ment reminds you of this.
Risk of injury.

5.43
On the roadPOSSIBLE CAUSESWHAT TO DO
Vibrations. Tyres not inflated to the correct pres-
sure, incorrectly balanced or dam-
aged. Check the tyre pressures: if this is not the
problem, have them checked by an ap-
proved dealer.
Coolant boiling in the coolant reservoir. Mechanical fault: damaged cylinder
head gasket.Stop the engine.
Contact an approved Dealer.
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.
White smoke from the exhaust. This is not necessarily a fault. Smoke
may be caused by regeneration of
the particle filter. Refer to the information on “Special fea-
tures of diesel versions” in Section 2.
OPERATING FAULTS (2/5)

5.44
On the roadPOSSIBLE CAUSESWHAT TO DO
Steering becomes heavy. Assistance overheating.
Fault with the electric assistance
motor.
Fault in the assistance system. Drive carefully at reduced speed, be aware
of the level of force in the steering wheel
needed to turn the wheels. Consult an ap-
proved dealer
The engine is overheating. The cool-
ant temperature warning light and the
STOP warning light come 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.
OPERATING FAULTS (3/5)
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 drain\
-
ing of the cooling system, it must be refilled with a new mixture prepar\
ed
in the correct proportions. Reminder: only products approved by our Technical
Department may be used for this purpose.