2011 RENAULT SCENIC compressor

13B-18V9 MR-372-J84-13B450$050.mif
DIESEL INJECTION
Fault finding – Features13B
EDC16 C36
Program No.: 91
Vdiag No.: 44, 4C, 48,
50, 54, 58
b. The connections between the vehicle's various computers are multiplexed.
The electronic system fitted in this vehicle is multiplexed.
It enables dialogue between the various vehicle computers. As a result:
– the fault warning lights on the instrument panel are lit by the multiplex network,
– 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 sent by the ABS computer via the multiplex network. The vehicle
speed signal is mainly used by the injection computer, the airbag computer and the automatic transmission
computer (if the vehicle is fitted with this).
c. Functions hosted:
Air conditioning management assistance:
For vehicles with air conditioning, the EDC16C36 system provides 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. under heavy acceleration when overtaking, anti-stalling and moving off strategies).
These conditions are only taken into account when they do not occur repeatedly, in order to prevent system
instabilities (erratic deactivations), when certain faults appear.
Management of the damper valve:
The damper valve currently 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.
– “valving” function depending on the engine operation: the damper valve closes by a few % to create a “'venturi”'
effect at the EGR valve passage section.
The aim of this is to accelerate the air flow of EGR gases and to reduce the emission of pollutants.
Thermoplunger management (only on certain F9Q816 engines in VDiag 48):
This vehicle is fitted with thermoplungers. They are managed and activated by the injection system.
There are two types of program:
– controlled by the injection system during particle filter regeneration,
– passenger compartment function; the air conditioning requests the injection to activate one or more thermoplungers
to raise the air temperature in the passenger compartment. The injection computer authorises the actuation or non-
actuation of the thermoplungers according to the operating phases and the power requirements of the engine.
The maximum number of thermoplungers that can be actuated is four. Their actuation depends mainly on the
coolant temperature (< 15°C) and the air temperature (< 5°C).

13B-27V9 MR-372-J84-13B450$060.mif
DIESEL INJECTION
Fault finding – Defect modes13B
EDC16 C36
Program No.: 91
Vdiag No.: 44, 4C, 48,
50, 54, 58
* normally aspirated: naturally aspiratedDefect
modesCause of fault Customer perception
Turbocharger
cut-off– Turbocharging pressure loop difference (vanes jammed,
compressor/turbine fault, turbocharging pressure sensor fault,
sensor connection fault, functional solenoid valve fault
(disconnected, hose kinked, solenoid valve mechanism jammed),
high pressure circuit leak (high pressure hose, major distributor
leak).
– Flowmeter failure (plausibility of the reading):
– significant line resistance on earth sensor,
– significant line resistance on sensor feed, significant line resistance
on sensor signal,
– flowmeter sensing element damaged,
– wiring/connection fault,
– flowmeter voltage or 5 V reference voltage deviation.
– Flowmeter failure (plausibility of sensitivity variation):
– flowmeter clogged/flow underestimated,
– flow overestimated,
– air circuit leak between flowmeter and compressor,
– air circuit leak after compressor.
– Electrical faults:
– signal short circuit to + 12 V,
– signal short circuit to earth,
– signal open circuit,
– sensor feed open circuit,
– open circuit, short circuit to earth and turbocharger solenoid valve
short circuit to + 12 V.
– Turbocharger pressure sensor fault (sensor signal short circuit with
sensor feed, sensor signal short circuit to + 12 V, sensor open
circuit to earth, sensor signal short circuit to earth, sensor feed open
circuit, sensor signal open circuit, significant line resistance on
sensor feed, significant line resistance on sensor signal, significant
line resistance on sensor earth, significant pressure difference
measured between the atmospheric pressure sensor and the
turbocharger pressure sensor at idle speed).
– EGR valve fault (valve clogged, valve jammed open).
– Camshaft sensor fault.
– Engine speed sensor fault.
– Sensor feed No. 1 fault.25-50% loss of engine
performance (normally
aspirated engine)
Rail pressure
limited– Rail pressure sensor fault.
– Sensor feed No. 3 fault.Poor performance
Rail pressure
reduction
– Positive rail pressure loop difference (measurement < setpoint).
Poor performance

13B-208V9 MR-372-J84-13B450$131.mif
DIESEL INJECTION
Fault finding – Interpretation of statuses13B
ET004AIR CONDITIONING AUTHORISATION
STATUS DEFINITIONYES: This status indicates that the air conditioning is active.
NO: This status indicates that the air conditioning is inactive.
NOTESSpecial notes:
Only perform these tests if the statuses do not correspond with the system
programming functions.
Conformity check with engine stopped and ignition on, or engine running, and engine coolant temperature
> 80°C
YES
or
NOIf the air conditioning is authorised or the compressor actuated (see 62A, Air
conditioning).
EDC16C36_V44_ET004/EDC16C36_V4C_ET004/EDC16C36_V48_ET004/EDC16C36_V50_ET004/EDC16C36_V54_ET004/
EDC16C36_V58_ET004
AFTER REPAIRDeal with any other faults. Clear the fault memory.
Switch off the ignition and carry out a road test followed by a test with the diagnostic
tool.
EDC16 C36
Program No.: 91
Vdiag No.: 44, 4C, 48,
50, 54, 58

13B-209V9 MR-372-J84-13B450$131.mif
DIESEL INJECTION
Fault finding – Interpretation of statuses13B
ET004
CONTINUED
Sensor electrical conformity
YESThe air conditioning authorisation only changes to YES if:
– the air conditioning request has been made by the driver (air conditioning switch in
AC or AUTO position with minimum ventilation),
– the engine is not under full load,
– the air conditioning system is not faulty.
NOStatus ET004 remains NO under the following conditions:
– Vehicle stopped with the ignition on,
– faults present in the air conditioning circuit,
– no air conditioning request made by the driver,
– engine under full load.
If status ET004 remains NO then the air conditioning should be authorised. Check:
– that the air conditioning compressor starts correctly,
– the air conditioning system supply fuses,
– the presence of refrigerant in the air conditioning circuit,
If the fault is still present, check the air conditioning computer faults (see 62B, Air
conditioning).
AFTER REPAIRDeal with any other faults. Clear the fault memory.
Switch off the ignition and carry out a road test followed by a test with the diagnostic
tool.
EDC16 C36
Program No.: 91
Vdiag No.: 44, 4C, 48,
50, 54, 58

13B-230V9 MR-372-J84-13B450$131.mif
DIESEL INJECTION
Fault finding – Interpretation of statuses13B
ET143LOW-SPEED FAN ASSEMBLY RELAY CONTROL
STATUS DEFINITIONThis status indicates whether the low speed fan assembly is active.
NOTESSpecial notes:
Only perform these tests if the statuses do not correspond with the system
programming functions.
If the vehicle is equipped with air conditioning, the engine cooling fan will operate at 1st
speed as soon as the air conditioning compressor is activated.
Use the Mégane II ph2, Scénic II ph2 Technical Note wiring diagram.
Conformity check with engine stopped and ignition on
INACTIVEEngine cold and air conditioning switched off
Conformity check with engine running, engine coolant temperature > 80°C
(heating and air-conditioning off) INACTIVE OR ACTIVE, depending on the engine temperature.
EDC16C36_V44_ET143/EDC16C36_V4C_ET143/EDC16C36_V48_ET143/EDC16C36_V50_ET143/EDC16C36_V54_ET143/
EDC16C36_V58_ET143
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
EDC16 C36
Program No.: 91
Vdiag No.: 44, 4C, 48,
50, 54, 58

13B-355
AFTER REPAIRRepeat the conformity check in the interpretation of statuses and parameters
V9 MR-372-J84-13B450$170.mif
DIESEL INJECTION
Fault finding – Interpretation of commands13B
SC017PARTICLE FILTER REGENERATION
NOTESOnly run this command after interpretation of the following faults:
– DF308 Clogged particle filter,
– DF311 Failed regenerations limit exceeded,
– DF312 Speed request.
WARNING
It is essential to observe the health and safety regulations (see MR364 (Megane II ph2), MR370 (Scenic II
ph2), Mechanical, 19B, Exhaust, Particle filter: Cleaning) and observe the following procedure.
SAFETY INSTRUCTIONS TO BE FOLLOWED:
The regeneration causes exhaust fumes and high temperatures.
The vehicle must be outside during regeneration.
If it is not possible to carry out regeneration outside, use an extractor fan that can withstand the very high
regeneration temperatures (400°C at the exhaust outlet).
Perform regeneration on a surface free from fire risks (oil, dry leaves, etc.). Nothing should be left in the vicinity
of the exhaust pipe.
IMPORTANT
– Check the engine oil level before running the command to avoid any engine racing. The oil level must
be between the minimum threshold and the middle level on the oil dipstick.
– Before performing a particle filter regeneration, it is essential to deactivate the air conditioning
compressor (risk of engine damage) and all the electrical consumers.
IF NECESSARY:
Regeneration can be stopped by briefly pressing the vehicle start button twice (less than 3 seconds).
Switch off the ignition and wait for the diagnostic tool message (maximum time 8 minutes) Communication lost
with computer: EDC16C36, check the tool connection and the computer supply. before switching on the
ignition again.
PROCEDURE TO BE FOLLOWED:
Before a particle filter regeneration, check that there are no leaks or blockages in the exhaust pipe,
Repair if necessary
To run this command, select the command mode on the diagnostic tool, and select command SC017 Particle
filter regeneration.
When regeneration is complete, a message will indicate whether regeneration was successful, and what
operations need to be carried out (filter replacement, whether an oil service is required, etc.).
EDC16C36_V48_SC017/EDC16C36_V50_SC017/EDC16C36_V58_SC017EDC16 C36
Program No.: 91
Vdiag No.: 48, 50, 58

13B-393
AFTER REPAIRCarry out a road test followed by a complete check with the diagnostic tool.
V9 MR-372-J84-13B450$190.mif
DIESEL INJECTION
Fault finding – Fault Finding Chart13B
ALP8 Oil leaks from the turbocharger
NOTESBefore analysing 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.
Check the area around the turbocharger
Note:
An oil leak does not correspond always to a fault of the turbocharger, the oil leak can arise from the area around
the turbocharger.
Depending on the vehicle type, the best visual access will be either from above or from below.
1. Do not start the engine.
Check the area around the turbocharger and identify the origin of the leaks.
Clean the oil traces on the turbocharger.
2. start the engine and let it warm up for several minutes.
IMPORTANT
If the air filter was previously removed, refit it before starting the engine (risk of aspirating foreign bodies into the
air inlet circuit).
Accelerate with no load several times, progressively increasing the duration before releasing the accelerator pedal.
Visually inspect the exterior condition of the fuel supply pipes and the turbocharger oil return and the area around it.
Identify the origin of the leaks.
Is an oil leak present at the air compressor inlet or outlet?
YESNO
AB
EDC16C36_V44_ALP08/EDC16C36_V4C_ALP08/EDC16C36_V48_ALP08/EDC16C36_V50_ALP08/EDC16C36_V54_ALP08/
EDC16C36_V58_ALP08EDC16 C36
Program No.: 91
Vdiag No.: 44, 4C, 48,
50, 54, 58

13B-394
AFTER REPAIRCarry out a road test followed by a complete check with the diagnostic tool.
V9 MR-372-J84-13B450$190.mif
DIESEL INJECTION
Fault finding – Fault Finding Chart13B
ALP8
CONTINUED 1
Check the air compressor inlet or outlet
Check for a loose interface (inlet or outlet) that is the cause of
the air leak.
Note:
It is normal to find oil traces inside the pipes at the turbocharger
inlet or outlet, because the air entering the compressor was
laden with oil from the engine rebreathing circuit.
Is the suspected interface properly tightened?Tighten the interface or the pipe
concerned.
end of the procedure
Replace the pipe concerned (see MR 364 (Mégane II) or 370 (Scénic II), Mechanical systems, 12B,
turbocharging).
A
NO
YES
EDC16 C36
Program No.: 91
Vdiag No.: 44, 4C, 48,
50, 54, 58