2009 RENAULT TWINGO RS fuel

13A-7
FUEL SUPPLY
Electric diesel fuel heater: Removal - Refitting
C44, and K9K
13A
REMOVAL
I - OPERATION FOR REMOVAL OF PART
CONCERNED
aPosition the vehicle on a two-post lift ( (see Vehicle:
Towing and lifting) ).
II - OPERATION FOR REMOVAL OF PART
CONCERNED
aDisconnect the electric diesel fuel heater electrical
connector (1) .
aRemove the nut (2) from the electric diesel fuel heat-
er mounting on the body.
aDisconnect the inlet and outlet fuel supply pipes (3)
from the electric diesel fuel heater.
aRemove the electric diesel fuel heater and its mount-
ing from the vehicle.
aSeparate the electric diesel fuel heater from its
mounting, letting it flow.
REFITTING
I - REFITTING OPERATION FOR PART
CONCERNED
aFit then lock the electric diesel fuel heater to its
mounting.
aFit the electric diesel fuel heater and its mounting to
the vehicle.
aConnect the electric diesel fuel heater inlet and out-
let fuel supply pipes.
aRefit the electric diesel fuel heater mounting nut on
the body.
aTighten the diesel heater mounting nut on the body.
aConnect the electric diesel fuel heater electrical con-
nector.
aPrime the diesel circuit using the manual priming
pump (4) .
aStart the engine then let it run for a few minutes to
check that it starts properly and to check that there
are no leaks.
II - FINAL OPERATION.
aDeal with possible fuel leaks.
120049
Note:
Make preparations for fuel outfl ow.
120045

13A-8
FUEL SUPPLY
Fuel circuit: Operating diagram
D4F or D7F or K4M
13A
Operating diagram of the fuel supply circuit ( « pump - sender - fuel filter » assembly)
The fuel supply circuit does not have a return.
The fuel pressure does not vary with engine load.
The circuit comprises:
-a rail (1) without a return pipe union and without a
supply pressure regulator,
-a single pipe (2) coming from the tank,
-a « pump - sender - fuel filter » supply assembly fitted
with a pressure regulator (3) , fuel pump (4) and fuel
filter (5) (all located in the tank),
-a fuel vapour recirculation tank (6) .
109471

13A-9
FUEL SUPPLY
Fuel pressure: Check
D4F or D7F
13A
CHECK
aI - PREPARATION OPERATION FOR CHECK
aEnsure you have a checking tool (Mot. 1311-01) and
a “T” union (Mot. 1311-08).
aRemove the oil filler neck.
II - TEST OPERATION
aDisconnect the petrol inlet pipe from the injector rail. Special tooling required
Mot. 1311-01Pressure gauges and petrol
pressure measur ing unions.
Mot. 1311-08Union for taking fuel pres-
sure measurements .
IMPORTANT
During this operation, be sure to:
-refrain from smoking or bringing red hot objects
close to the working area,
-be careful of fuel splashes when disconnecting
the union.
IMPORTANT
Wear goggles with side protectors for this opera-
tion.
IMPORTANT
Wear leaktight gloves (Nitrile type) for this opera-
tion.
WARNING
To avoid any corrosion or damage, protect the
areas on which fuel is likely to run.
116887
D4F

13A-10
FUEL SUPPLY
Fuel pressure: Check
D4F or D7F
13A
aConnect:
-the pipe fitted with a pressure checking gauge with
the “T” union of the tool (Mot. 1311-08),
-the “T” union to the rail,
-the petrol inlet duct to the “T” union.
aRefit the oil filler neck.aConnect:
-the pipe fitted with a pressure checking gauge with
the “T” union of the tool (Mot. 1311-08),
-the “T” union to the rail,
-the petrol inlet duct to the “T” union.
aRefit the oil filler neck. D4F, and 772
121821
D4F, and 780 or 782
121728

13A-11
FUEL SUPPLY
Fuel pressure: Check
D4F or D7F
13A
aConnect:
-the pipe fitted with a pressure checking gauge with
the “T” union of the tool (Mot. 1311-08),
-the “T” union to the rail,
-the petrol inlet duct to the “T” union.
aStart the engine.
aDetermine the pressure:
-the pressure must be a constant 3.5 bar,
-It may take a few seconds to obtain a correct injec-
tor rail pressure reading.
aSwitch off the engine.
III - FINAL OPERATION
aRemove the “T” union (Mot. 1311-08).
aRemove:
-the oil filler neck,-the “T” union (Mot. 1311-08).
aConnect the fuel supply union.
aRefit the oil filler neck. D7F
121822
D7F
D4F
D4F

13A-12
FUEL SUPPLY
Fuel pressure: Check
K4M
13A
CHECK
aI - PREPARATION OPERATION FOR CHECK
aEnsure you have a checking tool (Mot. 1311-01) and
a “T” union (Mot. 1311-08).
II - TEST OPERATION
aDisconnect the fuel supply union from the injector
rail.
aConnect:
-the pipe fitted with a test pressure gauge (Mot.
1311-01) with the "T" union (Mot. 1311-08),
-the "T" union (Mot. 1311-08) on the injector rail, Special tooling required
Mot. 1311-01Pressure gauges and petrol
pressure measur ing unions.
Mot. 1311-08Union for taking fuel pres-
sure measurements .
IMPORTANT
During this operation, be sure to:
-refrain from smoking or bringing red hot objects
close to the working area,
-be careful of fuel splashes when disconnecting
the union.
IMPORTANT
Wear goggles with side protectors for this opera-
tion.
IMPORTANT
Wear leaktight gloves (Nitrile type) for this opera-
tion.
WARNING
To avoid any corrosion or damage, protect the
areas on which fuel is likely to run.
116887
132333

13A-13
FUEL SUPPLY
Fuel pressure: Check
K4M
13A
-the injector rail fuel supply union to the "T" union
(Mot. 1311-08).
aStart the engine.
aRecord the pressure; this should be constant at 3.5
bar.
aSwitch off the engine.
III - FINAL OPERATION
aDisconnect the "T" union (Mot. 1311-08) from the in-
jector rail.
aConnect the fuel supply pipe union on the injector
rail.Note:
It may take a few seconds to obtain a correct
injector rail pressure reading.

13A-14
FUEL SUPPLY
Fuel flow: Check
D4F or D7F
13A
CHECK
a
I - PREPARATION OPERATION FOR CHECK
aRemove the oil filler neck.
aDisconnect the fuel supply union.aFit a “T” union to the fuel supply union (Mot. 1311-
08).
aFit a pipe which is long enough to drain the pump
into a container to the “T” outlet union. Special tooling required
Mot. 1311-08Union for taking fuel pres-
sure measurements .
Equipment required
graduated measuring cylinder
IMPORTANT
During this operation, be sure to:
-refrain from smoking or bringing red hot objects
close to the working area,
-be careful of fuel splashes when disconnecting
the union.
IMPORTANT
Wear goggles with side protectors for this opera-
tion.
IMPORTANT
Wear leaktight gloves (Nitrile type) for this opera-
tion.
WARNING
To avoid any corrosion or damage, protect the
areas on which fuel is likely to run.
D4F
D4F, and 772
121778