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

13B-3
MR-372-J84-13B200$036.mif
V13
DIESEL INJECTION
Fault finding – Introduction
EDC16
Program No: C1
Vdiag No: 18, 1C, 20,
50, 58, 5C
13B
Faults
Faults are declared as either present or stored (depending on whether they appeared in a certain context and have
disappeared since, or whether they remain present but have not been diagnosed within the current context).
The present or stored status of faults should be taken into consideration when the diagnostic tool is switched on
after the + after ignition feed (without any system components being active).
For a present fault, apply the procedure described in the Interpretation of faults section.
For a stored fault, note the faults displayed and apply the instructions in the Notes section.
If the fault is confirmed when the instructions in the Notes section are applied, the fault is present. Deal with the
fault
If the fault is not confirmed, check:
– the electrical connections that correspond to the fault,
– the connectors for this connection,
– the resistance of the component detected as faulty,
– the condition of the wires.
Refer to paragraphs 3.1 Checking the wiring and 3.2 Checking the connectors.
Conformity check
The aim of the conformity check is to check data that does not produce a fault on the diagnostic tool because the
data is inconsistent. Therefore, this stage is used to:
– carry out fault finding on faults that do not have a fault display, and which may correspond to a customer
complaint.
– check that the system is operating correctly and that there is no risk of a fault recurring after repairs.
This section gives the fault finding procedures for statuses and parameters and the conditions for checking them.
If a status is not behaving normally or a parameter is outside the permitted tolerance values, consult the
corresponding fault finding page.
Customer complaints – Fault finding chart
If the test with the diagnostic tool is OK but the customer complaint is still present, the fault should be processed by
customer complaints.
A summary of the overall procedure to follow is provided on the following page in the
form of a flow chart.

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-14
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
c) Functions hosted:
Air conditioning management assistance:
In the case of vehicles with climate control, the EDC16 system has the option of deactivating the air conditioning via
the UCH, under certain conditions of use:
– when requested by the driver,
– when starting the engine,
– if the engine overheats (in order to reduce the power the engine has to supply),
– when the engine speed is kept at a very high level (to protect the compressor),
– during transition phases (e.g. high acceleration demand for overtaking, anti-stalling and moving off). These
conditions are only taken into account if they do not occur repeatedly, so as to prevent system instabilities
(erratic deactivation),
– when certain faults appear.
Cold loop air conditioning management (Mégane II only):
The air conditioning is the cold loop type and its management shared between several computers.
The injection computer is responsible for:
– authorising cold requests according to the refrigerant pressure, the engine coolant temperature and the engine
speed,
– calculating the power absorbed by the compressor (from the refrigerant pressure),
– requesting operation of the GMV, from the UPC, according to the vehicle speed, the refrigerant pressure and the
engine coolant temperature.
The driver requests the air conditioning to be switched on by means of the ventilation selector coupled to a switch.
The cold air request is authorised or denied depending on the pressure measured. If this pressure is outside the
operating limits, the cold loop program is not activated.
Management of the damper valve:
The damper valve has three functions:
– the valve closes in order to block the passage of air towards the cylinders to shut off the engine. The aim of this is
to stop the engine as quickly as possible and to reduce instabilities as the engine is switched off.
– a "valving" function depending on the various engine functions: the damper valve closes by a few % in order to
create a venturi effect in the EGR valve flow section.
The aim of this is to accelerate the EGR gas flow rate and to reduce the emission of pollutants.
– regulatory function during the regeneration of the particle filter.
Thermoplunger management (only for Vdiag 58, 5C,18, 1C and 20):
This vehicle is fitted with thermoplungers. They are managed and activated by the injection system.
See configuration reading LC056 Thermoplungers: WITH or WITHOUT.
When necessary, the thermoplungers are actuated by the injection system only during particle filter
regeneration by means of a specific unit.
The maximum number of thermoplungers that can be managed is four; their activation depends mainly on the
coolant temperature (< 15°C) and air temperature (< 5°C).

13B-22
MR-372-J84-13B200$144.mif
V13
DIESEL INJECTION
Fault finding – Replacement of components
EDC16
Program No: C1
Vdiag No: 18, 1C, 20,
50, 58, 5C
13B
PROCEDURE:
Before replacing or reprogramming the computer:
– Select command SC003 Save computer data,
– if the following message appears: backup file exists, do you want to overwrite it?:
(this file corresponds to the last save carried out on the tool)
–select YES.
When the backup is complete, replace the computer or reprogram, then proceed to the next step.
After replacing or reprogramming the computer:
– Select command SC001 Write saved data, then follow the instructions given by the diagnostic tool,
– if the VIN has not been entered (see "Computer identification" on the main screen), select VP010 Enter VIN,
When both these commands have finished:
–switch off the ignition and wait 1minute before switching the ignition on again,
– then check the system faults, and clear any stored faults,
– otherwise, deal with faults that are present and clear the faults in the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
End of operation.IMPORTANT
Thermoplunger faults are displayed during reprogramming.
– DF032 Thermoplunger 1 relay control circuit,
– DF033 Thermoplunger 2 relay control circuit,
– DF034 Thermoplunger 3 relay control circuit,
– DF238 Thermoplunger 3 relay circuit,
– DF239 Thermoplunger 2 relay circuit,
– DF240 Thermoplunger 1 relay circuit.
In this case, configure the thermoplungers using configuration CF030 Thermoplungers.
IMPORTANT
– The injection computer retains the immobiliser code for life.
– The system has no security code.
– It is forbidden to perform tests with computers borrowed from the Parts Department or from another vehicle
which must then be returned.
– These computers are hard-coded.
– If the injection computer appears to be faulty, contact the Techline and refer to the fault finding log.

13B-24
MR-372-J84-13B200$144.mif
V13
DIESEL INJECTION
Fault finding – Replacement of components
EDC16
Program No: C1
Vdiag No: 18, 1C, 20,
50, 58, 5C
13B
REPLACING OR CLEANING THE EXHAUST GAS RECIRCULATION (EGR) VALVE
After the exhaust gas recirculation valve has been replaced, the computer must store the new valve offset and the
offset measured when the ignition was last switched off, which corresponds to the valve closing.
Using this data, the computer can detect whether the valve is clogged or seized.
When the valve is replaced or cleaned, clear the stored offsets so that the program uses the new valve's offset
value.
The data linked to this strategy is compiled in the Antipollution/OBD sub-function.
– PR128 First EGR valve offset.
– PR129 Last EGR valve offset > or = PR128 for a new valve.
The PR128 and PR129 programming must be cleared every time the exhaust gas recirculation valve is replaced.
PROCEDURE:
– Run command SC036 Reinitialise programming.
–Select EGR valve as the type of operation, then follow the instructions given by the diagnostic tool.
When the command is finished,
– switch off the ignition,
–wait 1 minute before switching on the ignition again.
When the ignition is switched on again, the new EGR valve offset is automatically reprogrammed.
– start the vehicle to enable the latest EGR valve offset to be programmed,
– switch off the ignition,
–wait 1 minute before switching on the ignition again.
Reprogramming of the last EGR valve offset is stored in the computer.
– then check the system faults, and clear any stored faults,
– otherwise, deal with the faults that are present and clear the faults in the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
End of operation.Note:
When the reinitialisation is complete, the Emission control/OBD sub-function displays:
PR128 = PR129 > 100 %
Note:
When the new EGR valve offset has been reprogrammed, the Emission control/OBD sub-function displays:
10 % < PR128 < 40 %
PR129 > 100 %
Note:
When the last EGR valve offset has been reprogrammed, the Emission control/OBD sub-function displays:
10 % < PR128 < 40 %
10% < PR129 < 40%

13B-31
MR-372-J84-13B200$216.mif
V13
DIESEL INJECTION
Fault finding – Fault summary table
EDC16
Program No: C1
Vdiag No: 18, 1C, 20,
50, 58, 5C
13B
*Temp: temperature
*drg: during
*regen: regeneration
*diff: differentialTool
faultDiagnostic tool titleAssociated
DTCLevel 1 fault
warning light
(Orange
heater plugs
"on" indicator
light)Level 2 fault
warning light
(Red
overheating
warning light)No fault
warning
light onOBD
warning
light lit
DF226Damper valve circuit 638CO/CC/
CC.0/CC.1/
1.DEF/
2.DEF/3.DEF
DF238Thermoplunger no. 3
relay circuit (Vdiag 18,
1C and 20 only)1643CO/CO.0/
CC.1/
1.DEF
DF239 Thermoplunger no. 1
relay circuit (Vdiag 18,
1C and 20 only)1642CO/CO.0/
CC.1/
1.DEF
DF240Thermoplunger no. 2
relay circuit (Vdiag 18,
1C and 20 only)1641CO/CO.0/
CC.1/
1.DEF
DF250ESP function C1221.DEF/
2.DEF
DF272EGR valve control
circuit403 1.DEF 2.DEF
DF276Injector code
programming6111.DEF/
2.DEF
DF308Clogged particle filter 1431 X
DF309Particle filter
downstream temp*
sensor544CO.1/
CC.0
DF310Particle filter upstream
temp* sensor2031CC.0/
CO.1CC.0/
CO.1
DF311 Number of
regeneration failures
exceeded (Vdiag 18,
1C and 20 only)1435 X
DF312Speed request 1436 X

13B-40
MR-372-J84-13B200$252.mif
V13
DIESEL INJECTION
Fault finding – Interpretation of faults
EDC16
Program No.: C1
Vdiag no.: 18, 1C, 20,
50, 58, 5C
13B
DF008
PRESENT
OR
STOREDPEDAL POTENTIOMETER CIRCUIT GANG 1
CO.0: Open circuit or short circuit to earth
CC.1 : Short circuit to + 12 V
1.DEF: Inconsistent signal
2.DEF: Accelerator pedal sensor locked
NOTESConditions for applying the fault finding procedure to stored faults:
The fault is declared present after a series of full-load/no-load actions on the
accelerator pedal.
Special notes:
Turbocharging, passenger compartment heating resistor activation and the cruise
control/speed limiter are not authorised.
If CO.0, CC.1 or 1.DEF is present the level 1 warning light is lit.
The engine speed is fixed at 1400 rpm if there is a fault on gangs 1 and 2 of the pedal
potentiometer and the engine torque is limited.
Use bornier Elé. 1681 or Elé. 1590 for all operations on the computer connectors.
Priorities when dealing with a number of faults:
Deal with fault first if it is DF011 Sensor feed voltage no. 1 first if it is present or
stored.
WARNING
This fault may appear if the wiring harness has been damaged.
Follow the procedure described in the Wiring Check in the Introduction.
This check enables the condition and the conformity of the engine wiring harness to be checked.
CO.0
NOTESPriorities when dealing with a number of faults:
If fault DF009 Pedal potentiometer circuit gang 2 is
present at the same time, check that the pedal sensor
connector is connected correctly.
Check the pedal potentiometer connections.
Check the injection computer connections.
Repair if necessary.
Check the continuity and insulation to earth of the following connections:
– connection code 3KW,
– connection code 3LR,
between components 120 and 921.
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.
Measure the resistance of the pedal potentiometer on gang 1 between connections 3LR and 3LT.
Replace the pedal potentiometer if the resistance is not approximately 0.8 kΩ < X < 2.6 kΩ.
AFTER REPAIRDeal with any faults.
Carry out a road test followed by another check with the diagnostic tool.
EDC16_V50_DF008/EDC16_V58_DF008/EDC16_V5C_DF008/EDC16_V18_DF008/EDC16_V1C_DF008/EDC16_V20_DF008

13B-44
MR-372-J84-13B200$252.mif
V13
DIESEL INJECTION
Fault finding – Interpretation of faults
EDC16
Program No.: C1
Vdiag no.: 18, 1C, 20,
50, 58, 5C
13B
DF009
CONTINUED 1
CO.0
NOTESPriorities when dealing with a number of faults:
If fault DF008 Pedal potentiometer circuit gang 1 is
present at the same time, check that the pedal sensor
connector is connected correctly.
Check the pedal potentiometer connections.
Check the injection computer connections.
Repair if necessary.
Check the continuity and insulation to earth of the following connections:
– connection code3LW,
– connection code 3LU,
between components 120 and 921.
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.
Measure the resistance of the pedal potentiometer on gang 2 between connections 3LU and 3LV.
Replace the pedal potentiometer if the resistance is not approximately 0.8 kΩ < X < 4.9 kΩ.
AFTER REPAIRDeal with any faults.
Carry out a road test followed by another check with the diagnostic tool.

13B-45
MR-372-J84-13B200$252.mif
V13
DIESEL INJECTION
Fault finding – Interpretation of faults
EDC16
Program No.: C1
Vdiag no.: 18, 1C, 20,
50, 58, 5C
13B
DF009
CONTINUED 2
CC.1
NOTESPriorities when dealing with a number of faults:
If fault DF008 Pedal potentiometer circuit gang 1 is
present at the same time, check that the pedal sensor
connector is connected correctly.
Check the pedal potentiometer connections.
Check the injection computer connections.
Repair if necessary.
Check the continuity and insulation from + 12 V of the following connections:
– connection code3LW,
– connection code 3LU,
– connection code 3LV,
between components 120 and 921.
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.
Measure the resistance of the pedal potentiometer on gang 2 between connections 3LU and 3LV.
Replace the pedal potentiometer if the resistance is not approximately 0.8 kΩ < X < 4.9 kΩ.
AFTER REPAIRDeal with any faults.
Carry out a road test followed by another check with the diagnostic tool.

13B-48
MR-372-J84-13B200$252.mif
V13
DIESEL INJECTION
Fault finding – Interpretation of faults
EDC16
Program No.: C1
Vdiag no.: 18, 1C, 20,
50, 58, 5C
13B
* diff: differentialDF011
CONTINUED 1
1.DEF
2.DEF
NOTESPriorities when dealing with a number of faults:
If fault DF008 Pedal potentiometer circuit gang 1 is
present at the same time, check that the pedal sensor
connector is connected correctly.
If fault DF004 Turbocharging pressure sensor circuit is
present at the same time, check that the turbocharger
pressure sensor circuit connector is connected correctly.
If fault DF315 Particle filter diff* pressure sensor is
present at the same time,check that the turbocharging
pressure sensor connector is connected correctly.
The following sensors are connected to supply no. 1:
– Turbocharger pressure sensor.
– Particle filter differential pressure sensor.
– Accelerator pedal potentiometer sensor, gang 1.
To locate a faulty sensor and/or connection, disconnect one of these sensors then check whether the fault
becomes stored.
If the fault is still present, start the operation again with the other sensor.
(Wait a few seconds after each disconnection so that the computer can carry out the check). If the fault is stored
after a disconnection, replace the faulty sensor or repair its connection.
Clear the faults created by the multiple disconnections.
If the fault is still present when the sensors have been disconnected:
1. Check the earth insulation of the following connections:
For Laguna II:
– connection code 3LQ between components 120, 1474 and 1290.
– connection code 3LP between components 120 and 1474.
– connection code 3TL between components 120 and 1290.
– connection codes 3LR and 3LS between components 120 and 921.
For Mégane II and Scénic II:
– connection code 3LQ between components 120, 1071 and 1290.
– connection code 3LP between components 120 and 1071.
– connection code 3TL between components 120 and 1290.
– connection codes 3LR and 3LS between components 120 and 921.
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.
AFTER REPAIRDeal with any faults.
Carry out a road test followed by another check with the diagnostic tool.