2010 RENAULT SCENIC fuel pressure

PETROL INJECTION
Fault finding - System operation
17B
17B - 7
PETROL INJECTION
Fault finding - System operation
17B
17B - 7V9 MR-372-J84-17B050$094.mif
S3000 Injection
Program No.: AD
Vdiag No.: 4C / 54PETROL INJECTION
Fault finding - System operation
1. SYSTEM OPERATION
Composition
The injection system consists of the:
– accelerator potentiometer,
– clutch pedal switch,
– TDC sensor,
– atmospheric pressure sensor,
– air temperature sensor,
– coolant temperature sensor,
– upstream oxygen sensor,
– downstream oxygen sensor,
– cruise control switch,
– steering column switch,
– cruise control on/off switch,
– fuel vapour absorber,
– injection computer,
– motorised throttle valve,
– 4 injectors,
– 4 pencil coils,
– pinking sensor,
– camshaft dephaser solenoid valve (non-LPG K4M only),
– camshaft position sensor (non-LPG K4M only),
– turbocharging pressure sensor (F4R turbo only)
– electric coolant pump (F4R turbo only),
– wastegate solenoid valve (only on F4R Turbo),
– turbocharging solenoid valve (only on F4R-Turbo)
Computer
128 track SAGEM type S3000 FLASH EEPROM computer controlling injection and ignition.
Multipoint injection in sequential mode.
Connections to the other computers:
– air conditioning,
– UCH,
– protection and switching unit (UPC)
– Automatic Gearbox Electronic Control Unit (AUTO).
– airbag,
– ABS/ESP,
– instrument panel.
MR-372-J84-17B050$094.mif

PETROL INJECTION
Fault finding - System operation
17B
17B - 10
PETROL INJECTION
Fault finding - System operation
17B
17B - 10V9 MR-372-J84-17B050$094.mif
S3000 Injection
Program No.: AD
Vdiag No.: 4C / 54
Fuel supply management
Fuel is supplied by the fuel pump. It is controlled each time the ignition is switched on, for 1 second, to provide a
certain pressure level in the circuit, and thereby achieve a correct start, particularly if the vehicle has been unused
for a long time.
When the engine is running, the fuel pump relay is always controlled.
Control of the petrol pump relay can be viewed through status ET047 Petrol pump control circuit.
The petrol tank is vented by way of a canister filled with activated charcoal that traps the vapour from the petrol tank.
This canister is bled via the engine vacuum pipe. It enters the inlet plenum via a hose, whose section is controlled by
a bleed valve. It is controlled by the injection computer via the opening cycle ratio. For reasons of engine instability
or canister bleed solenoid valve operating noise emitted by the vehicle, there are two possible frequencies for
controlling the canister bleed solenoid valve:
●a low frequency 8Hz,
●a high frequency 20 Hz.
The frequency of the control opening cycle ratio depends on the engine speed.
Bleed the canister to drain it as it fills, to limit vapour release into the air if a canister is saturated for example.
Air supply management
The idling speed regulator performs all the calculations required for physical control of the idling speed actuator: the
motorised throttle. The functional component of the regulator is adaptive (variation programming and ageing).
If the idling speed regulation conditions are observed, ET054 Idle speed regulation is ACTIVE, the idling speed
regulator continuously positions the motorised throttle to maintain the engine speed at its idling setpoint. The
motorised throttle opening ratio necessary to comply with the speed setpoint is then given by parameter PR091
Idling speed regulation theoretical OCR.
Note on parameter PR091:
This parameter uses only 2 parameters accessible in fault finding frame: PR444 Idle speed integral correction and
PR090 Idle speed regulation programming value which is the integral adaptive action.
–PR090 Idling speed regulation programming value is a stored parameter designed to program dispersion and
engine ageing for the idling speed regulator. The programming is carried out only when the engine is idling and
warm, and no electrical consumer (air conditioning, fan assembly, power assisted steering) is operating. Therefore
it adjusts slowly.
–PR444 Idling speed regulation integral correction is continuously calculated to take into account the air required
by consumers.

PETROL INJECTION
Fault finding - System operation
17B
17B - 14
PETROL INJECTION
Fault finding - System operation
17B
17B - 14V9 MR-372-J84-17B050$094.mif
S3000 Injection
Program No.: AD
Vdiag No.: 4C / 54
3. OBD management
Managed OBD programming is as follows:
– catalytic converter operational fault finding,
– upstream oxygen sensor operational fault finding,
– misfiring fault finding with two levels of detection: pollutant misfiring and catalytic converter breakage
misfiring,
– fuel supply system fault finding.
The misfiring and fuel supply system fault finding is performed continuously.
The operational fault finding for the upstream sensor and the catalytic converter can be only be carried out once per
journey, and can never occur at the same time.
OBD fault manager:
The OBD faults manager does not replace or modify conventional electrical fault management. Perform to comply
with OBD standard.
The requirements are:
●storing OBD faults,
●illuminate the OBD warning light for all faults where the OBD emission thresholds are exceeded,
●flash the OBD warning light for misfire faults damaging the catalytic converter.
Operating principle.
If a fault is detected and confirmed during 3 consecutive journeys then:
●an OBD stored fault is raised,
●the OBD fault warning light receives a request to be lit continuously. This request is only recognised if the
fault in question is authorised to activate the OBD warning light.
To deactivate the warning light, no OBD faults should be detected for 3 consecutive journeys.
The electrical fault finding checks taken into consideration by the OBD faults manager are as follows:
– pressure,
– turbocharging pressure,
– coolant temperature,
– air temperature
– upstream sensor,
– downstream sensor,
– upstream sensor heating,
– downstream sensor heating,
–injector1,
–injector2,
–injector3,
–injector4,– ignition coil 1,
– ignition coil 2,
– ignition coil 3,
– ignition coil 4,
– petrol pump,
– wastegate,
– canister bleed,
– air line system,
– turbocharging system
– pinking sensor,
– camshaft dephaser.

PETROL INJECTION
Fault finding - Fault summary table
17B
17B-31
PETROL INJECTION
Fault finding - Fault summary table
17B
17B-31V9 MR-372-J84-17B050$282.mif
S3000 Injection
Program No.: AD
Vdiag No.: 4C / 54
Tool faultAssociated
DTC codeDescriptionLevel 2 fault
warning light
(Red brake
warning light)Level 1 fault
warning light
(Orange
injection
warning light)No warning
light onOBD
warning light
DF079 0638Motorised throttle
valve automatic
control2.DEF/
3.DEF/
4.DEF/CO/
6.DEF1.DEF/5.DEF/
7.DEF/8.DEF
DF080 0010Camshaft
dephaser circuitCO/CC.0/
CC.1/1.DEF/
2.DEF/3.DEF/
4.DEF/5.DEF
DF081 0443Canister bleed
solenoid valve
circuitCC.O/1.DEF CO/ CC.1
DF084 0685Actuator relay
control circuitCO/CC.0
CC.1
DF085 0627Fuel pump relay
control circuitCO/CC.0
CC.1/1.DEF
DF088 0325Pinking sensor
circuit1.DEF/2.DEF
DF089 0105Inlet manifold
pressure sensor
circuit1.DEF
2.DEF
3.DEF1.DEF
2.DEF
3.DEF
DF091 0500Vehicle speed
signal1.DEF/2.DEF
DF092 0130Upstream oxygen
sensor circuitCO.0
CC.1/1.DEF
2.DEF
DF093 0136Downstream
oxygen sensor
circuitCO.0
CC.1/1.DEF
DF095 0120Throttle
potentiometer
circuit gang 1CO.0/CC.1
1.DEF/2.DEF
DF096 0220Throttle
potentiometer
circuit track 2CO.0/ CC.1
DF099 C101Automatic gearbox
or sequential
gearbox
connection via the
multiplex network1.DEF/2.DEF/
3.DEF/4.DEF
DF101 C122ESP multiplex
connection1.DEF

PETROL INJECTION
Fault finding - Fault summary table
17B
17B-32
PETROL INJECTION
Fault finding - Fault summary table
17B
17B-32V9 MR-372-J84-17B050$282.mif
S3000 Injection
Program No.: AD
Vdiag No.: 4C / 54
Tool faultAssociated
DTC codeDescriptionLevel 2 fault
warning light
(Red brake
warning light)Level 1 fault
warning light
(Orange
injection
warning light)No warning
light onOBD
warning light
DF102 2502Signal: power sig.*
available1.DEF
DF105 0585Cruise control/
speed limiter on/off
circuit1.DEF
DF106 0575Cruise control/
speed limiter
function selectors
on steering wheel1.DEF
DF109 0313Low fuel level
misfiring1.DEF/
2.DEF/
3.DEF
DF119 0340Camshaft sensor
signal1.DEF/2.DEF/
3.DEF/4.DEF
DF126 1604Passenger
compartment
heating resistor
(RCH)1.DEF
DF138 0830 Clutch pedal switch 1.DEF
DF154 0335Flywheel signal
sensor circuit1.DEF/2.DEF/
3.DEF
DF196 0225Pedal sensor
circuit gang 11.DEF
CO/CC.0/
CC.1CO/CC.0/
CC.1
2.DEF
DF198 2120Pedal sensor
circuit gang 2CO
CC.0/ CC.1CO
CC.0/ CC.1
DF228 0504 Brake signal 1.DEF/2.DEF
DF232 0530Refrigerant
pressure sensor
circuit1.DEF
DF361 0351Ignition coil control
- cylinders 1 - 4CO.0/CC.1
1.DEFCO.0/CC.1
1.DEF
DF362 0352Ignition coil control
- cylinders 2 - 3CO.0/CC.1
1.DEFCO.0/CC.1
1.DEF
DF377 C115Petrol↔ LPG
connection1.DEF/2.DEF
DF394 0420Catalytic converter
operating fault1.DEF/
2.DEF
DF398 0170Fuel circuit
operating faultCO/ 1.DEF

PETROL INJECTION
Fault finding - Interpretation of faults
17B
17B-100
PETROL INJECTION
Fault finding - Interpretation of faults
17B
17B-100V9 MR-372-J84-17B050$423.mif
S3000 Injection
Program No.: AD
Vdiag No.: 4C / 54
DF398
PRESENT
OR
STOREDFUEL CIRCUIT OPERATING FAULT
1.DEF: Non-compliance with emission control standards
2.DEF: Component in bad condition
NOTESPriority when dealing with a number of faults:
If faults DF085 Fuel pump relay control circuit, DF549 Canister bleed circuit and
injector faults
DF026 Cylinder 1 injector control circuit,
DF027 Cylinder 2 injector control circuit;
DF028 Cylinder 3 injector control circuit,
DF029 Injector control circuit cylinder 4, are present or stored, deal with these first.
Special note:
–the OBD warning light is lit,
– a fuel supply system fault can lead to starting difficulties, and loss of comfort and
power.
Check the cleanliness, condition and fitting of the fuel vapour absorber.
Check the connections and correct operation of the petrol pump.
Check the cleanliness, condition and fitting of the injectors and their sealing.
Repair if necessary.
Check:
– that the fuel is present and correct,
– the tank vent,
– that there are no leaks on the petrol circuit (from the tank to the injectors),
– that there are no kinked hoses (especially after dismantling),
– the fuel flow rate and pressure.
Repair the faulty component(s) if necessary (see MR 364 or 370 Mechanics, 13A, Fuel supply).
If the fault is still present, deal with the other faults then proceed to the conformity check.
AFTER REPAIRFollow the instructions to confirm repair.
Deal with any other faults.
Clear the stored faults.
S3000_V4C_DF398/S3000_V54_DF398

PETROL INJECTION
Fault finding - Status summary table
17B
17B - 169
PETROL INJECTION
Fault finding - Status summary table
17B
17B - 169V9 MR-372-J84-17B050$564.mif
S3000 Injection
Program No.: AD
Vdiag No.: 4C / 54
Tool status Diagnostic tool title
ET076Starting
ET077Impact detected
ET079Air conditioning present
ET081Accelerator pedal position
ET082Motorised throttle position
ET083Camshaft dephaser in defect mode
ET086Camshaft dephaser control
ET088Compressor actuation request
ET089Flywheel target programming
ET111RCH number set
ET112RCH cut-off
ET300Richness regulation
ET340Request by automatic transmission to light up the OBD warning light
ET405Clutch pedal switch
ET415Deactivation of cruise control/speed limiter
ET561Operating mode
ET564Type 1 defect mode
ET565Type 2 defect mode
ET566Type 3 defect mode
ET567Type 4 defect mode
ET568Type 5 defect mode
ET569Type 6 defect mode
ET581Petrol combustion misfiring fault finding
ET582LPG combustion misfire fault finding
ET583LPG cylinder 1 combustion misfire
ET584LPG cylinder 2 combustion misfire
ET585LPG cylinder 3 combustion misfire
ET586LPG cylinder 4 combustion misfire
ET617Upstream oxygen sensor OBD fault finding
ET619Fuel circuit OBD fault finding
ET674Refrigerant pressure
ET703Cruise control/speed limiter buttons
ET704Brake switch no. 1
ET705Brake switch no. 2

PETROL INJECTION
Fault finding - Interpretation of statuses
17B
17B - 174
PETROL INJECTION
Fault finding - Interpretation of statuses
17B
17B - 174V9 MR-372-J84-17B050$611.mif
S3000 Injection
Program No.: AD
Vdiag No.: 4C / 54
ET054
IDLE SPEED REGULATION
ACTIVE
INACTIVE
NOTESThere must be no present or stored faults.
Check parameters: PR030 Accelerator pedal position,
PR035 Atmospheric pressure,
PR058 Air temperature,
PR064 Coolant temperature,
PR118 Measured throttle position gang 1,
PR119 Measured throttle position gang 2.
Check that all these parameters are completely correct.
IDLE SPEED TOO
HIGH
Check:
– the engine oil level (too high ⇒ oil combustion),
– that the restrictions are present in the oil vapour rebreathing circuit,
– the sealing between the throttle valve and inlet manifold,
– the manifold pressure sensor sealing,
– the fuel vapour absorber bleed, which must not be jammed open,
– the fuel vapour absorber bleed system sealing,
– the brake servo system sealing,
– the sealing between the inlet manifold and cylinder head,
– the oil vapour recovery circuit sealing between the inlet manifold and cylinder head,
– the fuel pressure and flow (see MR 364 or 370 Mechanics, 17B, Petrol injection),
– the condition and cleanliness of the injectors,
– the cylinder compressions,
– the timing adjustment,
– the hydraulic tappets if there is camshaft noise (see MR 364 or 370 Mechanics, 11A, Top and front of engine).
Repair the defective component if necessary.
AFTER REPAIRRepeat the conformity check from the start.
S3000_V4C_ET054/S3000_V54_ET054