RENAULT SCENIC 2000 J64 / 1.G Technical Note 3426A Manual PDF

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Thermal plunger
13
13-20
If the battery voltage is > 13.5 volts
if not then
Thermal plungers
not suppliedOne thermal plunger
supplied
If after 20 seconds the battery
voltage is
> 13.5 volts
if not then
Thermal plungers
not suppliedTwo thermal plungers
supplied
If after 20 seconds
the battery voltage is
> 13.5 volts
if not then
Thermal plungers
not suppliedThree thermal plungers
supplied if the battery
voltage is
> 13.5 volts and if the
conditions mentioned above
are fulfilled

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Low pressure pump (supercharging pump)
13
13-21
Low pressure pump (supercharging pump)
The supercharging pump is an electric pump located in
the engine compartment.
REMOVAL
IMPORTANT: take note of the quantity of diesel and
the residual pressure in the pipes.IMPORTANT:
A fuel cock (R) is fitted to the fuel filter at the level of
the return pipe leading to the tank.
It should be in open position for normal operation.
To reprime the circuit after an intervention, a filter
change or a fuel fault you should:
– close the fuel cock (R),
– start the low pressure pump by switching on the
ignition several times,
– start the engine,
– OPEN THE FUEL COCK (the valve is open when the
two coloured lines are aligned).
NOTE: certain vehicles are not fitted with a fuel cock.
In this case, ignore this operation. YOU SHOULD FOLLOW THE CLEANNESS
INSTRUCTIONS CLOSELY.
16776S
16870R3

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Fuel filter
13
13-22
Fuel filter
The fuel filter is located in the engine compartment. It is contained in an unremovable cartridge. This cartridge
contains a regulating valve which limits the flow of diesel circulating to the engine.
To replace the filter it is therefore necessary to replace the whole unit.
REMOVAL
IMPORTANT: take note of the quantity of diesel and
the residual pressure in the pipes.
Disconnect the pipes on the filter which:
– feed the engine (1),
– come from the fuel tank (2) (low pressure pump),
– return to the tank (3) via the fuel cock (depending on
version),
– return from the engine (4),
– which return to the tank via the temperature
exchanger (5).
NOTE: certain vehicles are not fitted with a fuel cock.
In this case, ignore the repriming procedure.REFITTING
It is vital that you respect the position of the
connections to the filter.
Be careful not to squeeze or damage the pipes.
IMPORTANT:
A fuel cock (R) is fitted to the fuel filter at the level of the
diesel return pipe to the tank.
It should be in open position for normal operation.
To reprime the circuit after an intervention, a filter
change or a fuel fault you should:
– close the fuel cock (R),
– start the low pressure pump by switching on the
ignition several times,
– start the engine,
– OPEN THE FUEL COCK (the valve is open when the
two coloured lines are aligned).
It is necessary to periodically bleed the water trapped
in the diesel filter via the bleed plug (6). YOU SHOULD FOLLOW THE CLEANNESS
ADVICE CLOSELY.
15773R
16870R3

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High pressure pump
13
13-23
High pressure pump
IT IS PROHIBITED TO REMOVE THE INTERIOR OF
THE PUMP.
IMPORTANT: before any intervention, connect the
after-sales diagnostic tool, query the injection
computer and check that the injection rail is not under
pressure.
Take note of the fuel temperature.SPECIAL TOOLING REQUIRED
Mot. 1054 TDC setting pin
Mot. 1200-01 Pump-pulley retaining tool
Mot. 1383 Tool for removing high pressure
pipes
Mot. 1525 Pulley extractor
Mot. 1525-01 Extractor adaptor for F9Q
ESSENTIAL SPECIAL TOOLING
"Low torque" torque wrench
TIGHTENING TORQUES (in daN.m)
High pressure pipe 2.5±0.2
High pressure pump mounting 3.2± 0.3
High pressure pump pulley nut 5 ± 0.5
Suspended mounting cover bolt 6.2 ± 1
Torque reaction arm bolt 15

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High pressure pump
13
13-24
REMOVAL
Disconnect the battery.
Set the engine to top dead centre using the pin
Mot. 1054.
Release from the fuel filter from its support.
Remove:
– the injection computer mounting,
– the high pressure pulley cover,
– the pump outlet/injection rail inlet pipe using
Mot.1383.
Insert the blanking plugs.
Disconnect the fuel return pipe from the pump and
insert the plugs to maintain cleanness.
Fit tool Mot. 1200-01 on the pulley.Remove the nut from the high pressure pump pulley.
Fit the extractor Mot. 1525 fitted with the adaptor
Mot. 1525-01 on the pulley pump then disassemble
the unit.
Remove the mounting nuts by holding the bolts (1). YOU SHOULD FOLLOW THE CLEANNESS
INSTRUCTIONS CLOSELY
16870S
15872R1
16183R

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High pressure pump
13
13-25
REFITTING
Refitting is the reverse of removal.
NOTE: be careful not to place the high pressure pipe under stress. Undo the
high pressure rail.
Offer up the high pressure pipe nuts on the pump and rail side.
Tighten the high pressure rail.
Tighten the high pressure pipe connections to torque (high pressure pump
side first).
You must replace the diesel return pipe after each removal.
16192-1S

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High pressure pump
13
13-26
Reprime the circuit:
– close the fuel cock (R),
– start the low pressure pump while switching on the
ignition several times,
– start the engine,
– OPEN THE FUEL COCK (R) (the valve is open
when the two coloured lines are aligned).
NOTE: certain vehicles are not fitted with a fuel cock.
In this case, ignore the repriming procedure.
16870R3
After any intervention, check that there are no
leaks in the diesel circuit. Start the engine at idling
speed until the fan starts up, then accelerate several
times under no load.

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Injector rail
13
13-27
Injector rail
IMPORTANT: before any intervention, connect the
after-sales diagnostic tool, query the injection
computer and check that the injection rail is not under
pressure.
Take note of the fuel temperature.SPECIAL TOOLING REQUIRED
Mot. 1294 -01 Tool for removing windscreen
wiper arms
Mot. 1383 Tool for removing high pressure
pipes
ESSENTIAL SPECIAL TOOLING
"Low torque" torque wrench
TIGHTENING TORQUES (in daN.m)
High pressure pipe nut 2.5±0.2
Injection rail mounting bolt 2.2±0.2
REMOVAL
Remove (for the Scénic):
– the windscreen wiper arms using tool Elé. 1294-01,
– the scuttle panel,– the bulkhead panel.
Disconnect the flow meter and remove the air unit.
11020R
11036R2

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Injector rail
13
13-28
REMOVAL
Disconnect:
– the battery,
– the pressure sensor (1),
– the injectors,
– the cylinder marking sensor.
Undo and remove the diesel HP pipes.
Insert the plugs to maintain cleanness.
Gently remove the injection rail.YOU SHOULD FOLLOW THE CLEANNESS INSTRUCTIONS CLOSELY
16192-2R

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Injector rail
13
13-29
REFITTING
Position the injection rail and finger-tighten the mounting bolts (the rail should
be floating).
Position all the HP pipes and finger-tighten them.
Tighten:
– all the HP injection pipe connections (on the injector side (1) then on the
injection rail side (2).
– the rail bolts (3).
– the HP pump/rail pipe (4).
16192R1