fuel pump RENAULT SCENIC 2011 J95 / 3.G Engine And Peripherals EDC16 Workshop Manual

13B-11
MR-372-J84-13B200$108.mif
V13
13B
DIESEL INJECTION
Fault finding – System operation
System outline
The high pressure injection system is designed to deliver a precise quantity of diesel fuel to the engine at a set
moment.
It is fitted with a 112-track BOSCH EDC16 C3 type computer.
The system comprises:
– a priming bulb on the low pressure circuit,
– a diesel filter,
– a high pressure pump with a built-in low pressure pump (transfer pump),
– a high pressure regulator mounted on the pump,
– an injector rail,
– a diesel fuel pressure sensor built into the rail,
– four solenoid injectors,
– a coolant temperature sensor,
– a cylinder reference sensor,
– an engine speed sensor,
– a turbocharger pressure sensor,
– an accelerator pedal potentiometer,
– an EGR solenoid valve,
– an atmospheric pressure sensor integrated into the injection computer,
– an air flowmeter with an air temperature sensor,
– a turbocharging pressure limitation solenoid valve,
– a motorised damper valve,
– a particle filter,
– a particle filter differential pressure sensor,
– a particle filter upstream temperature sensor,
– a particle filter downstream temperature sensor,
– a temperature sensor upstream of the turbine,
– four thermoplungers
The common rail direct high pressure injection system works sequentially (based on the petrol engine multipoint
injection).
This injection system reduces operating noise, reduces the volume of pollutant gases and particles and produces
high engine torque at low engine speeds thanks to a pre-injection procedure.
The high pressure pump generates the high pressure and transmits it to the injector rail. The actuator located on the
pump controls the quantity of diesel fuel supplied, according to the requirement determined by the computer. The rail
supplies each injector through a steel pipe.
MR-372-J84-13B200$108.mif
EDC16
Program No: C1
Vdiag No: 18, 1C, 20,
50, 58, 5C

13B-12
MR-372-J84-13B200$108.mif
V13
DIESEL INJECTION
Fault finding – System operation
EDC16
Program No: C1
Vdiag No: 18, 1C, 20,
50, 58, 5C
13B
a) The computer:
Determines the value of injection pressure necessary for the engine to operate correctly and then controls the
pressure regulator.
Checks that the pressure value is correct by analysing the value transmitted by the pressure sensor located on the
rail.
It determines the injection timing required to deliver the right quantity of diesel fuel and the moment when injection
should start. Controls each injector electrically and individually after determining these two values.
The flow injected into the engine is determined by:
– the duration of injector control,
– the rail pressure (regulated by the computer),
– the injector opening and closing speed,
– the needle stroke (determined by a constant for the type of injector),
– the nominal hydraulic flow of the injector (specific to each injector).
The computer manages:
– idling regulation,
– exhaust gas flow reinjection to the inlet (EGR),
– fuel supply check (advance, flow and rail pressure),
– the fan assembly control,
– the air conditioning (cold loop function),
– the cruise control/speed limiter function,
– pre-post heating control,
– indicator lights control via the multiplex network,
– the operation of the catalysed particle filter.
The high pressure pump is supplied at low pressure by an integrated low pressure pump (transfer pump).
It supplies the rail, the pressure of which is controlled by the fuel flow actuator (MPROP) for charging, and for
discharging by the injector valves. This compensates for pressure drops. The flow actuator allows the high pressure
pump to supply the exact quantity of diesel fuel required to maintain the pressure in the rail. This component
minimises the heat generated and improves engine output.
In order to discharge the rail using the injector valves, the valves are controlled by brief electrical pulses which are:
– short enough not to open the injector (passing through the feedback circuit from the injectors),
– long enough to open the valves and discharge the rail.

13B-13
MR-372-J84-13B200$108.mif
V13
DIESEL INJECTION
Fault finding – System operation
EDC16
Program No: C1
Vdiag No: 18, 1C, 20,
50, 58, 5C
13B
Some vehicles have adopted a sensor for detecting water in the diesel fuel, located in the filter. If there is water in
the diesel fuel, the orange "Injection and pre-post heating" warning light will come on.
The system can inject diesel fuel into the engine at a pressure of up to 1600 bar. Before each operation, check that
the injector rail is depressurised and that the fuel temperature is not too high.
You must respect the cleanliness guidelines and safety advice specified in this document for any work on the high
pressure injection system.
Do not remove the internal parts of the pump and injectors. Only the flow actuator, the diesel temperature sensor
and the Venturi tube can be replaced.
For safety reasons, do not loosen high pressure pipe unions when the engine is running.
It is not possible to remove the pressure sensor from the fuel rail because this may cause circuit contamination
faults. If the pressure sensor fails, the pressure sensor, the rail and the five high pressure pipes must be replaced.
Do not remove an injection pump pulley marked with the number 070 575. If the pump needs to be replaced, replace
the pulley.
Supplying any system component directly with +12V is prohibited.
Ultrasonic decoking and cleaning are prohibited.
Never start the engine unless the battery is connected correctly.
Disconnect the injection computer when carrying out any welding work on the vehicle.
b)The connections between the vehicle's various computers are multiplexed.
The electronic system fitted in this vehicle is multiplexed. This system enables dialogue between the various vehicle
computers. As a result:
– the activation of the fault warning lights on the instrument panel is performed by the multiplex network, with the
vehicle speed sensor on the gearbox deactivated,
– vehicle faults are displayed by the multiplex network,
– the vehicle speed sensor on the gearbox is not needed.
The vehicle speed signal on the instrument panel is transmitted by the ABS computer via a wire connection, then
sent out on the multiplex network by the instrument panel. The vehicle speed signal is used mainly by the injection
computer and the airbag computer.WARNING
The engine must not operate with:
– Diesel fuel containing more than 10% diester.
– petrol, even in tiny quantities.

13B-80
MR-372-J84-13B200$288.mif
V13
DIESEL INJECTION
Fault finding – Interpretation of faults
EDC16
Program No.: C1
Vdiag no.: 18, 1C, 20,
50, 58, 5C
13B
DF053
PRESENT
OR
STORED
RAIL PRESSURE REGULATION FUNCTION
CC.1: Short circuit to + 12 V
CC.0: Short circuit to earth
CO: Open circuit
1.DEF: Internal electronic fault
2.DEF: Pressure measured too low
3.DEF: Pressure measured too high
4.DEF: Insufficient pressure
5.DEF: Pressure < minimum
6.DEF: Pressure > maximum
7.DEF: Significant pump control
8.DEF: Above maximum threshold
NOTESConditions for applying the fault finding procedure to a stored fault:
The fault is declared present after:
– the engine is started,
– a road test,
– an actuator command AC011 Rail pressure regulator.
Special notes:
If the fault is present:
– it is not possible to start the engine,
– engine stops if already started,
–if 3.DEF is present, the level 1 warning light is lit,
– if one of the other faults is present, the level 2 warning light is lit.
Use bornier Elé.1681 or Elé.1590 for any operation on the injection computer
connectors.
CC.1
NOTESNone
Check the rail pressure regulator connectors.
Check the injection computer connections.
Check the low pressure circuit by running test 3 Low pressure circuit check.
Check the conformity of the fuel used by running test 11 Diesel fuel conformity check.
Check the overpressure valve, run test 12 Incorrect operation of the overpressure valve,
Check the operation of the injectors, run test 9 Incorrect injector operation.
Repair if necessary.
Measure the resistance of the rail pressure regulator between connections 3HI and 3FB (Mégane II and
Laguna II) or 3FB1 (Scénic II).
Replace the injection pump if its resistance is not 3 ohms ± 1 at 20°C.
AFTER REPAIRDeal with any faults.
Carry out a road test followed by another check with the diagnostic tool.
EDC16_V50_DF053/EDC16_V58_DF053/EDC16_V5C_DF053/EDC16_V18_DF053/EDC16_V1C_DF053/EDC16_V20_DF053

13B-81
MR-372-J84-13B200$288.mif
V13
DIESEL INJECTION
Fault finding – Interpretation of faults
EDC16
Program No.: C1
Vdiag no.: 18, 1C, 20,
50, 58, 5C
13B
DF053
CONTINUED 1
Check the continuity and insulation from + 12 V of connection 3HI between components 120 and 1105.
If the connection or connections are faulty and there is a repair method (see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check the rail pressure sensor using the interpretation of DF007 Rail pressure sensor circuit.
If the fault is still present, replace the injection pump.
CC.0
CO
NOTESNone
Check the rail pressure regulator connectors.
Check the injection computer connections.
Check the low pressure circuit by running test 3 Low pressure circuit check.
Check the conformity of the fuel used by running test 11 Diesel fuel conformity check.
Check the overpressure valve, run test 12 Incorrect operation of the overpressure valve,
Check the operation of the injectors, run test 9 Incorrect injector operation.
Repair if necessary.
Measure the resistance of the rail pressure regulator between connections 3HI and 3FB (Mégane II and
Laguna II) or 3FB1 (Scénic II).
Replace the injection pump if its resistance is not 3 ohms ± 1 Ω at 20°C.
Check the continuity and insulation to earth on connection 3HI between components 120 and 110 5.
AFTER REPAIRDeal with any faults.
Carry out a road test followed by another check with the diagnostic tool.

13B-82
MR-372-J84-13B200$288.mif
V13
DIESEL INJECTION
Fault finding – Interpretation of faults
EDC16
Program No.: C1
Vdiag no.: 18, 1C, 20,
50, 58, 5C
13B
DF053
CONTINUED 2
If the connection or connections are faulty and there is a repair method (see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
With the ignition on, check for + 12 V after relay on the connection 3FB (Mégane II and Laguna II) or 3FB1
(Scénic II) of the rail pressure regulator.
If there is no + 12 V on connection 3FB (Mégane II and Laguna II) or 3FB1 (Scénic II), check the continuity
and absence of interference resistance of the following connections:
– connection code 3FB between components 11 05 and 983 (Laguna II),
– connection code 3FB1 between components 110 5 and 1337 (Scénic II),
– connection code 3FB between components 11 05 and 1337 (Mégane II).
If the connection or connections are faulty and there is a repair method (see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check the rail pressure sensor using the interpretation of DF007 Rail pressure sensor circuit.
If the fault is still present, replace the injection pump.
1.DEF
NOTESNone
Check the rail pressure regulator connectors.
Check the injection computer connections.
Check the low pressure circuit by running test 3 Low pressure circuit check.
Check the conformity of the fuel used by running test 11 Diesel fuel conformity check.
Check the overpressure valve, run test 12 Incorrect operation of the overpressure valve,
Check the operation of the injectors, run test 9 Incorrect injector operation.
Repair if necessary.
Measure the resistance of the pressure regulator between connections 3HI and 3FB (Mégane II and Laguna II)
or 3FB1 (Scénic II).
Replace the injection pump if its resistance is not 3 ohms ± 1 at 20°C.
AFTER REPAIRDeal with any faults.
Carry out a road test followed by another check with the diagnostic tool.

13B-84
MR-372-J84-13B200$288.mif
V13
DIESEL INJECTION
Fault finding – Interpretation of faults
EDC16
Program No.: C1
Vdiag no.: 18, 1C, 20,
50, 58, 5C
13B
DF053
CONTINUED 4
2.DEF A
8.DEF
NOTESNone
Check the rail pressure regulator connectors.
Check the injection computer connections.
Check the low pressure circuit by running test 3 Low pressure circuit check.
Check the conformity of the fuel used by running test 11 Diesel fuel conformity check.
Check the overpressure valve, run test 12 Incorrect operation of the overpressure valve.
Repair if necessary.
Measure the resistance of the pressure regulator between connections 3FB (Mégane II and Laguna II) or 3FB1
(Scénic II) and 3HI.
Replace the injection pump if its resistance is not 3 ohms ± 1 Ω at 20°C.
Check the continuity and absence of interference resistance on the following connections:
– connection code 3HI between components 120 and 1105,
– connection code 3FB (Mégane II and Laguna II) or 3FB1 (Scénic II) between components 1105 and 983
(Laguna II) or 1337 (Mégane II and Scénic II).
If the connection or connections are faulty and there is a repair method (see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
In the event of rail overpressure:
Check the operation of the injectors by running test 9 Poor injector operation.
Check that the rail pressure sensor is operating correctly using command AC011 Rail pressure regulator. Check
the conformity of parameter PR038 Rail pressure.
If these checks do not reveal any faults, and if the fault is still present, replace the rail pressure regulator.
in the event of rail underpressure:
Check that the rail pressure sensor is operating correctly using command AC011 Rail pressure regulator. Check
the conformity of parameter PR038 Rail pressure.
Check the low pressure diesel circuit priming.
Check the conformity of the diesel filter connections.
Check the condition of the filter (clogging and water saturation).
Check that there are no air bubbles between the filter and the high pressure pump.
Check the low and high pressure diesel fuel circuit sealing (visual inspections, etc.) pump housing, pressure relief
valve, pipes, rail and injector unions, injector wells, etc.
Check the conformity of the seal fitting on the pressure regulator.
Check the operation of the injectors by running test 9 Poor injector operation.
Carry out the necessary operations.
If the fault is still present replace the rail pressure regulator.
AFTER REPAIRDeal with any faults.
Carry out a road test followed by another check with the diagnostic tool.

13B-291
MR-372-J84-13B200$720.mif
V13
13B
DIESEL INJECTION
Fault finding – Command summary table
Tool command Diagnostic tool title
SC001Write saved data
SC002Enter injector codes
SC003Save computer data
SC017Particle filter regeneration
SC036Reinitialise programming
CF030Thermoplungers
RZ005Programming
RZ007Fault memory
RZ034Computer memory
LC009Air conditioning
LC056Thermoplungers
LC065Water in diesel fuel sensor
LC120Cruise control
LC121Speed limiter
VP010Enter VIN
AC001Preheating unit
AC004Turbocharging solenoid valve
AC011Rail pressure regulator
AC012Damper valve
AC031Thermoplunger no. 3 relay (Vdiag 58 only)
AC038Low-speed fan assembly relay (Vdiag 18, 1C, 20 only)
AC039High-speed fan assembly relay (Vdiag 18, 1C, 20 only)
AC063Thermoplunger no. 1 relay (Vdiag 58 only)
AC064Thermoplunger no. 2 relay (Vdiag 58 only)
AC195Electric coolant pump
MR-372-J84-13B200$720.mif
EDC16
Program No: C1
Vdiag No: 18, 1C, 20,
50, 58, 5C

13B-319
MR-372-J84-13B200$828.mif
V13
EDC16
Program No.: C1
Vdiag no.: 18, 1C, 20,
50, 58, 5CDIESEL INJECTION
Fault finding – Fault Finding Chart13B
ALP 2 Starting difficult (or impossible)
NOTESBefore dealing with this customer complaint, check that there are no faults, and
the conformity (or otherwise) of the parameters and statuses using the
diagnostic tool.
If the customer complaint is not eliminated, perform the following checks.
Is it difficult or impossible to start the engine?
PART A:
Check the engine earths.
Ensure that the engine speed reaches 250 rpm with the starter motor, as displayed on the parameter screen (PR055
Engine speed).
If the engine speed is less than 250 rpm, refer to Technical Note 6014A, Checking the charging circuit.
If the engine speed shown on CLIP is zero and the engine is running, check the resistance of the engine speed
sensor between connections 3BG and 3BL of component 149:
Replace the sensor if its resistance is not 510 Ω < X < 850 Ω at 20°C
Check the continuity of the following connections:
– connection codes 3BG and 3BL between components 120 and 149.
Check the conformity of the engine earths (oxidation, tightness, etc.).
Check the mounting, the gap (if necessary refer to the information in the workshop repair manual for the vehicle) and
the condition of the sensor (overheating).
Replace if necessary.
Check the synchronisation of the camshaft sensors and the engine speed sensors with the display of ET238
Synchronisation.
If synchronisation is not active, refer to the checks described in DF195 Camshaft/engine speed consistency.
check the fuel circuit sealing.
If the fault is still present, see DF053 Rail pressure regulation function 2.DEF, step 4.
Check that the heater plugs are actuated using the AC001 Preheating unit command.
Check the sealing and condition of the inlet circuit: run Test 4 Turbocharged air inlet circuit check and follow the
associated fault finding procedure.
Check that there are no foreign bodies on the flowmeter grille: run Test 5 Air flowmeter and follow the associated
fault finding procedure.
Check the position of the exhaust gas recirculation valve.
Check that the exhaust is not blocked: run Test 1 Exhaust pipe check and follow the associated fault finding
procedure.
Check the consistency of the signal from the engine coolant temperature sensor.
Check the operation of the pressure regulator (see AC011 Rail pressure regulator).
Check the operation of the injectors (excessive return leak, clogging, seizing): run Test 9 Poor injector operation.
Check the engine timing (and the position of the high pressure pump sprocket).
Check the balance of the compressions, according to the power consumption during the starting phase
(Compression test menu on the CLIP Technic tool or using a compression gauge)
after the operation, clear the faults caused by disconnecting the regulator and the heater plugs.
End of part AImpossible
AFTER REPAIRCarry out a road test followed by a complete check with the diagnostic tool.
EDC16_V50_ALP2/EDC16_V58_ALP2/EDC16_V5C_ALP2/EDC16_V18_ALP2/EDC16_V1C_ALP2/EDC16_V20_ALP2

13B-321
MR-372-J84-13B200$828.mif
V13
DIESEL INJECTION
Fault finding – Fault Finding Chart
EDC16
Program No.: C1
Vdiag no.: 18, 1C, 20,
50, 58, 5C
13B
ALP 3 Injection noise
NOTESBefore dealing with this customer complaint, check that there are no faults, and
the conformity (or otherwise) of the parameters and statuses using the
diagnostic tool.
If the customer complaint is not eliminated, perform the following checks.
If the injection noise occurs after starting from cold:
Check the low pressure diesel circuit priming.
Check the fuel heater supply.
Check the operation of the preheating system.
Check that fuel and engine temperatures are consistent.
If the injection noise occurs at idle speed:
Check the condition of the injector connector and pressure regulator terminals.
Check the conformity of the air flow signal, refer to the interpretation of PR132 Air flow or run Test 4
Turbocharged air inlet circuit check.
If the complaint is still present, perform fault finding on the injectors: run Test 9 Poor injector operation.
does the injection noise occur at all engine speeds?
Run fault finding on the injectors: run Test 9 Poor injector operation.
Check the condition of the injector connector and pressure regulator terminals.
Check the conformity of the fuel used by running Test 11 Diesel fuel conformity check.
If the diesel fuel is not correct: Replace the diesel fuel.
Change the diesel filter.
Bleed the low and high pressure diesel circuit.
Check the conformity of the air flow signal, use the interpretation of PR132 Air flow.
If the customer complaint is still present:
Run command AC011 Rail pressure regulator,
check the following parameters:
– the conformity of the fuel pressure between PR008 Rail pressure setpoint and PR038 Rail pressure,
– the conformity of the pump fuel flow between PR157 Fuel flow setpoint and PR017 Fuel flow. If the fault is
still present, contact the techline.
AFTER REPAIRCarry out a road test followed by a complete check with the diagnostic tool.
EDC16_V50_ALP3/EDC16_V58_ALP3/EDC16_V5C_ALP3/EDC16_V18_ALP3/EDC16_V1C_ALP3/EDC16_V20_ALP3