2010 RENAULT SCENIC sensor

PETROL INJECTION
Fault finding - Introduction
17B
17B-2
PETROL INJECTION
Fault finding - Introduction
17B
17B-2V9 MR-372-J84-17B050$047.mif
117B
S3000 Injection
Program No.: AD
Vdiag No.: 4C / 54PETROL INJECTION
Fault finding - Introduction
1. SCOPE OF THIS DOCUMENT
This document presents the fault finding procedure applicable to all computers with the following specifications:
2. PREREQUISITES FOR FAULT FINDING
Documentation type
Fault finding procedures (this document):
– Assisted fault finding (integrated into the diagnostic tool), Dialogys.
Wiring Diagrams:
– Visu-Schéma (CD-ROM), paper.
Type of diagnostic tools
–CLIP + multiplex line sensor
Special tooling required
3. REMINDERS
Procedure
To run fault finding on the vehicle's computers, switch on the ignition in fault finding mode (forced + after ignition
feed).
Proceed as follows:
– vehicle card in reader,
– press and hold the Start button (longer than 5 seconds) with start-up conditions not fulfilled,
– connect the diagnostic tool and perform the required operations.
To cut off the + after ignition feed, proceed as follows:
– disconnect the diagnostic tool,
– press the Start button twice briefly (less than 3 seconds),
– ensure that the + after ignition feed has been cut off by checking that the computer indicator lights on the instrument
panel have gone out. Vehicle(s):MEGANE II phase 2
SCENIC II phase 2
Engines:K4J 740 - K4M 766/812/813 - K4M 680 -
K4M 788 LPG
F4R 770/771 - F4R-T 776
F4R-T 774 (MEGANE II phase 2
RENAULT SPORT)
Function concerned: Petrol injectionName of computer: Sagem S3000
Program no.: AD
Vdiag No.: 4C, 54
Special tooling required
Multimeter
Ele. 1497Bornier
Elé. 1681Universal bornier
S3000_V4C_PRELI/S3000_V54_PRELI
MR-372-J84-17B050$047.mif

PETROL INJECTION
Fault finding - Introduction
17B
17B-6
PETROL INJECTION
Fault finding - Introduction
17B
17B-6V9 MR-372-J84-17B050$047.mif
S3000 Injection
Program No.: AD
Vdiag No.: 4C / 54
5. FAULT FINDING LOG
You will always be asked for this log:
– when requesting technical assistance from Techline,
– for approval requests when replacing parts with mandatory approval, and to be enclosed when returning monitored
parts on request. The log is needed for warranty reimbursement, and enables better analysis of the parts removed.
6. SAFETY INSTRUCTIONS
Safety rules must be observed during any work on a component to prevent any damage or injury:
– check the battery voltage to avoid incorrect operation of computer functions,
– use the proper tools.
7. FAULT FINDING
Stored faults are managed the same way for all sensors and actuators.
A stored fault is cleared after 128 recurrence-free starts. IMPORTANT!IMPORTANT
Any fault on a complex system requires thorough fault finding with the appropriate tools. The
FAULT FINDING LOG, which should be completed during the fault finding procedure, ensures a
record is kept of the procedure carried out. It is an essential document when consulting the
manufacturer.
IT IS THEREFORE MANDATORY TO FILL OUT A FAULT FINDING LOG EACH TIME FAULT FINDING IS
CARRIED OUT.

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 - 9
PETROL INJECTION
Fault finding - System operation
17B
17B - 9V9 MR-372-J84-17B050$094.mif
S3000 Injection
Program No.: AD
Vdiag No.: 4C / 54
Camshaft dephaser
Its role is to modify the valve timing.
The camshaft dephaser is continuously variable in operation.
In applications without a camshaft sensor, the engine phasing is controlled by software. This is the case on engines
that do not have a camshaft dephaser.
This information can be displayed by reading configuration LC008 Camshaft dephaser.
A first strategy called "Memo phasing" is applied to phase the engine management on starting according to the data
recorded when the engine last stalled. Wait for the end of auto-feed (power latch and therefore this data being
saved) before disconnecting the computer.
Then, a second program confirms the first decision. It is based on torque analysis.
The injection computer actuates a camshaft dephaser that varies according to the engine:
–K4M engine
Continuous variable inlet camshaft dephaser between 0 and 43° of the crankshaft, controlled by a solenoid
valve supplied by an opening cycle ratio circuit through the injection computer.
–F4R and F4R-T engines
Inlet camshaft dephaser controlled by a solenoid valve with an all or nothing supply from the injection
computer.
Camshaft position sensor (non-LPG K4M only)
The role of the camshaft sensor is:
– to locate the computer cylinders so that the computer correctly synchronises the sequential injection,
– checks the position of the inlet camshaft.
Motorised throttle valve
The throttle valve carries out idling speed regulation and engine air intake modulation functions. It comprises an
electric motor and two throttle position potentiometers.
When the engine is idling, the throttle position is regulated according to the idling speed setpoint. This setpoint takes
into account the major power consumers (air conditioning) and operating conditions (air temperature and coolant
temperature).

PETROL INJECTION
Fault finding - System operation
17B
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PETROL INJECTION
Fault finding - System operation
17B
17B - 11V9 MR-372-J84-17B050$094.mif
S3000 Injection
Program No.: AD
Vdiag No.: 4C / 54
Adaptive idling speed correction:
Under normal warm operating conditions, the idling speed opening cycle ratio value PR091 Idling speed regulation
theoretical OCR varies between a high value and a low value to obtain the nominal idling speed.
After operating dispersion (running in, engine fouling, etc.), the opening cycle ratio value may be close to the high or
low values.
The adaptive correction PR090 Idling speed regulation programming value on the idling speed opening cycle
ratio compensates for the gradual variations in the engine's air requirement, by bringing the idling speed opening
cycle ratio back to an average nominal value.
This adjustment only takes effect if the coolant temperature is above 75 °C, 1 minute after starting the engine and
during the idle speed regulation phase.
Idling speed setpoint calculation:
The idling speed setpoint is given by parameter PR010 Idle speed regulation valve setpoint.
The idling speed regulation setpoint depends on the coolant temperature, the depollution programming, the climate
control requirements, the position of the gearbox selector, any power assisted steering action, the passenger
compartment heating resistors, the oil temperature (engine protection) and the electricity balance calculated by the
injection software (the engine speed is increased by 160 rpm maximum if the battery voltage remains below 12.7 V).
Richness management
For optimal operation of the catalytic converter, the richness must be maintained around 1.
Richness regulation is controlled by the upstream sensor. The sensor gives voltage according to the difference
between the partial oxygen pressures contained in the exhaust and a cavity filled with a reference mixture
(atmosphere).
As the partial oxygen pressure in the exhaust is representative of the richness, the voltage supplied to the computer
represents a Rich - Lean signal.
Adaptive richness correction:
In loop mode, the richness regulation corrects the injection duration in order to obtain a mixture which is as close as
possible to a richness of 1. The richness correction value PR138 Richness correction is close to 50 %, with limits
of 0 and 100 %.
The richness adaptive corrections PR143 Self-adapting richness gain and PR144 Self-adapting richness offset
are used to offset the injection mapping to centre richness regulation on 50 %.
Adaptive corrections take 50 % as an average value after computer initialisation (clearing the programming) and have
the following limit values:

PETROL INJECTION
Fault finding - System operation
17B
17B - 12
PETROL INJECTION
Fault finding - System operation
17B
17B - 12V9 MR-372-J84-17B050$094.mif
S3000 Injection
Program No.: AD
Vdiag No.: 4C / 54
A vehicle is fitted with an upstream sensor if the configuration reading LC003 Upstream oxygen sensor is WITH.
For the upstream sensor to be operational very rapidly, it is heated. Sensor heating ET052 Upstream O
2 sensor
heating is only ACTIVE when the engine is running. It is disabled above 84 mph (140 km/h) or with the engine
under load.
The downstream sensor is also used for richness regulation via the double loop program. The way it works is to
characterise the condition of the upstream sensor and to compensate for any upstream sensor dynamic richness
drift.
The vehicle is fitted with a downstream sensor if the configuration reading LC004 Downstream oxygen sensor is
WITH.
For the double loop ET056 Double richness loop to be ACTIVE, the vehicle must be driven with the engine warm
for approximately 1 minute 30 seconds in the absence of no load conditions.
The downstream sensor is also heated. The command is not immediate when the engine is started.
ET053 Downstream O
2 sensor heating is ACTIVE after a time that depends on the latest coolant temperature with
the engine running and in the absence of no load conditions. The heating of the downstream sensor is deactivated
under 84 mph (140 km/h) or when the engine is under load.
There are several types of control depending on the sensor type:
●BOSCH LSH25/NTK 6L (6Ω)/DELPHI AFS128 (3 wires): Continuous control,
●BOSCH LSF 4.7 (known as PLANAR): Each time the engine is started, control is first executed by means
of an OCR (opening cycle ratio) type signal of 20 Hz in frequency for approximately 20 seconds then it
becomes continuous,
●BOSCH NTK 6L (3.3Ω): each time the engine is started, the control is continuous first for 15 seconds then
executed by an OCR (Opening Cycle Ratio) type signal with a 20 Hz frequency.
Management of turbocharging pressure (F4R Turbo only)
The turbocharging pressure is adjusted via the position of the pressure regulation valve (wastegate).
Principle
This pressure regulation valve, connected via a rod to the wastegate diaphragm, is operated by the injection
computer via a solenoid valve. This solenoid valve is normally open and is fitted to the inlet pipe between the air filter
and turbocharger inlet.
At rest (open position), this solenoid valve connects the turbocharger outlet (turbocharging pressure) and the
pressure regulation valve control diaphragm.
The turbocharging pressure affects the diaphragm directly, the pressure regulation valve (wastegate) opens and the
maximum possible pressure is approximately 1,350 mbar - 1,400 mbar, irrespective of the engine speed (minimum
turbocharging for the engine).
When the solenoid valve is controlled, the turbocharging pressure signal (taken at the turbocharger outlet) is
diverted to the compressor inlet. As a result, the diaphragm is not subject to turbocharging pressure, the pressure
regulation valve (wastegate) closes back to a position imposed by the regulation system.

PETROL INJECTION
Fault finding - System operation
17B
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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 - System operation
17B
17B - 15
PETROL INJECTION
Fault finding - System operation
17B
17B - 15V9 MR-372-J84-17B050$094.mif
S3000 Injection
Program No.: AD
Vdiag No.: 4C / 54
Catalytic converter:
Purpose
Catalytic converter fault finding should detect a malfunction which would cause hydrocarbon pollutant emissions to
exceed the EOBD (European On Board Diagnostic) limit.
Principle
The ability of the catalytic converter to store oxygen indicates the condition of the catalytic converter. As the
catalytic converter ages, its ability to store oxygen reduces along with its ability to treat pollutants. The principle lies
in using the correlation between the oxygen storage capacity and the HC emissions.
When the conditions for starting fault finding are confirmed, richness excitation peaks are applied, which has the effect
of sending bursts of oxygen into the catalytic converter.
If the catalytic converter is in good condition it will absorb the oxygen sent to it and the downstream sensor voltage
will remain at its average value.
If it is damaged, it rejects the oxygen that it cannot store and the downstream sensor starts knocking. The more the
catalytic converter is damaged, the more the downstream oxygen sensor will oscillate.
Sensors:
Purpose
Sensor fault finding should detect a malfunction which would cause pollutant emissions to exceed the EOBD
(European On Board Diagnostic) limit.
There are 2 kinds of oxygen sensor damage:
●mechanical damage to the component (breakage, cut in wire) which leads to an electrical fault,
●chemical or thermal damage to the component leading to a slower response time of the sensor and to the
increase in the average reaction time.
Description of programming
When the conditions for starting fault finding are confirmed, the upstream sensor signal periods are read and the
glitches (interference phenomena) removed, then the average taken, and compared with an EOBD (European On
Board Diagnostic) limit average period.
The fault finding check may be staggered, i.e. divided over several consecutive engine stability phases, and its
duration will vary according to the condition of the sensor.