fuel pump RENAULT SCENIC 2000 J64 / 1.G Technical Note 3426A User Guide

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Checking diesel pressure and flow
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Checking diesel pressure and flow
It is possible to check the pressure and flow in the low pressure fuel circuit.
The low pressure is delivered by the supercharging pump (electric pump located under the diesel filter designed to
feed the high pressure pump).
SPECIAL TOOLING REQUIRED
Mot. 1311-01
Pressure gauge or
Mot. 1328
Mot. 1311-08 Pressure measuring connector
ESSENTIAL SPECIAL TOOLING
Graduated 2000 ml test tube
CHECK LOW PRESSURE
(SUPERCHARGING PUMP)
Place a "T" connector Mot. 1311-08, to position the
pressure gauge Mot. 1311-01 or Mot. 1328 at the
outlet (S) of the fuel filter or at the HP pump inlet.
Turn the fuel pump using the diagnostic tool or by
directly feeding the pump (each time the ignition is
switched on the low pressure pump is supplied for
30 seconds).
Measure the pressure which should be between
2.5 and 4 bars.CHECK THE FLOW (SUPERCHARGING PUMP)
Make the pump flow into a 2000 ml graduated test
tube. Turn on the ignition to run the pump. The pump is
supplied for 30 seconds if the engine is not started.
The flow read should be 80 to 100 litres/hour
minimum.
IMPORTANT: it is forbidden to measure the
pressure and the flow of the high pressure pump.
15773R1

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Pressure regulator
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Pressure regulator
TIGHTENING TORQUES (In daN.m or/and °)
Regulator bolt 0.9 ± 0.1
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.
PRESSURE REGULATOR (2)
REMOVAL
Disconnect the battery.
Remove the regulator connector.
Remove the retaining bracket for the diesel
temperature sensor.
Unscrew the regulator mounting bolts.
Remove the regulator by turning in an anticlockwise
direction (do not use any tools as a lever when
removing the pump regulator).REFITTING
Change the seals.
Dampen the seals with clean diesel.
Replace the regulator in the pump by turning it in an
anticlockwise direction (do not use any tools as a lever
when replacing the pump regulator).
Fit the mounting bolts then tighten to torque.
Connect the connector. YOU SHOULD FOLLOW THE CLEANNESS
INSTRUCTIONS CLOSELY.
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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Computer
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Connector C
A4
A3
A2
A1
B4
B3
C1
E4
J4
K4
L4
L3
L2
L1
M4
M3
M2
M1---
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→
→
→
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→
→
←
→
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→
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→TURBOCHARGER PRESSURE SENSOR EARTH
FLOW METER EARTH
LOW SPEED FAN RELAY CONTROL OUTPUT
ELECTRIC FUEL PUMP CONTROL OUTPUT
HIGH SPEED FAN RELAY CONTROL OUTPUT
DIESEL PRESSURE SENSOR EARTH
CAMSHAFT POSITION SENSOR EARTH
ADDITIONAL HEATING CONTROL OUTPUT
ADDITIONAL HEATING CONTROL OUTPUT
CAMSHAFT POSITION SIGNAL SENSOR
INJECTOR 2 CONTROL
INJECTOR 2 SUPPLY
INJECTOR 3 SUPPLY
INJECTOR 4 CONTROL
INJECTOR 4 SUPPLY
INJECTOR 1 SUPPLY
INJECTOR 3 CONTROL
INJECTOR 1 CONTROL