air conditioning RENAULT SCENIC 2012 J95 / 3.G Engine And Peripherals EDC16CP33 Workshop Manual

13B-12V12 MR-372-J84-13B300$030.mif
DIESEL INJECTION
Fault finding – System operation13B
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74
a. The computer:
Determines the injection pressure value necessary for the correct operation of the engine; the pressure can reach
1600 bar in the rail and it must be constantly regulated.
Checks that the pressure value is correct by analysing the value transmitted by the pressure sensor located on
the rail.
Determines the injection duration 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 quantity of fuel injected is determined by:
– Engine speed (Crankshaft + Cam for synchronisation).
– Accelerator pedal.
– Turbocharging pressure.
– Coolant temperature,
– Inlet air temperature.
–Air flow
– Pressure in the rail.
– Vehicle speed.
The computer manages:
– idling regulation,
– exhaust gas flow reinjection to the inlet,
– fuel supply check (advance, flow and rail pressure),
– the fan assembly control,
– the air conditioning (cold loop function),
– cruise control/speed limiter function,
– pre-post heating control,
– indicator lights control via the multiplex network,
– the operation of the catalysed particle filter,
– turbocharging pressure.
The high pressure pump is supplied at low pressure by an integrated low pressure pump (transfer pump).
It supplies the rail, the pressure in which is regulated by:
–the pressure regulator on the rail (DRV) for starting phases, starting the engine when cold (increase in
temperature to heat the diesel circuit) and when throttling-off,
–the pressure regulator on the pump (MPROP) for all other phases (90% of cases).
As natural leaks in piezoelectric injectors are very low, opening the pressure regulator (DRV) is the only quick
method of dumping the rail pressure and it prevents overpressure when injection is restarted.
The pressure regulator on the pump (MPROP) enables the high pressure pump to supply just the exact quantity
of diesel fuel required to maintain the rail pressure. This component minimises the heat generated and improves
engine output.
Note:
Each piezoelectric injector is connected to the return rail. The injector return rail is kept pressurised by a
mechanical valve at the end of the return rail with a 10 bar calibration (by comparison, solenoid injectors used to
return directly into the common fuel return circuit). This feature is linked to the operation of piezoelectric injectors.

13B-14V12 MR-372-J84-13B300$030.mif
DIESEL INJECTION
Fault finding – System operation13B
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74
c. Functions hosted:
Air conditioning management assistance:
For vehicles with air conditioning, the EDC16CP33 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.
I - Cold loop air conditioning management:
The air conditioning is the cold loop type and its management shared between several computers.
The injection computer is responsible for:
– authorising requests for cold air depending on the engine coolant temperature and the engine speed,
– calculating the power absorbed by the compressor from the refrigerant pressure.
–requesting fan assembly actuation (Mégane II ph2 and Scénic II ph2) and controlling fan assembly actuation
(Laguna II, Vel Satis ph2 and Espace IV ph2), 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.
The air conditioning system is authorised by the injection computer 2 to 8 seconds after the engine is started.
Management of the thermoplungers:
To improve cold starting, the vehicle is fitted with thermoplungers. These thermoplungers are managed and
controlled by the injection computer, according to the operating phases, primarily to accelerate the increase in
engine coolant temperature.
The maximum number of thermoplungers that can be actuated is four and their actuation depends mainly on the
coolant temperature and the air temperature.
See configuration reading LC056 Thermoplungers: WITH or WITHOUT.
When necessary, they are actuated by the injection system only during particle filter regeneration by means
of a special unit.
The maximum number of thermoplungers that can be managed is four and their activation depends mainly on the
coolant temperature (< 15°C) and air temperature (< 5°C).

13B-21V12 MR-372-J84-13B300$040.mif
13B
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74
Summary of available configuration readings
NOTESConfiguration readings are used to check the state of configurations performed.
The configuration readings cannot be changed.
LC009: Air conditioning WITH OR WITHOUT
LC056: Thermoplungers WITH OR WITHOUT
LC065: Water in diesel fuel sensor WITH OR WITHOUT
LC120: Cruise control WITH OR WITHOUT
LC121: Speed limiter WITH OR WITHOUT
DIESEL INJECTION
Fault finding – Configurations

13B-30V12 MR-372-J84-13B300$060.mif
DIESEL INJECTION
Fault finding – Fault summary table13B
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74
* temp: Temperature
* Diff: Differential
* regen.: RegenerationTool faultAssociated
DTCDiagnostic tool title
DF3152452 Particle filter diff.* pressure sensor
DF3232100 Damper valve
DF333C101 Injection -> automatic gearbox connection
DF364530 Air conditioning
DF502565 Cruise control or speed limiter button
DF5322502 Alternator charge signal
DF5692263 Turbocharging circuit
DF6452101 Damper valve position regulation
DF646120 Damper valve position sensor
DF647488 EGR valve position regulation
DF651470 Turbine upstream pressure sensor circuit
DF652544 Turbine upstream temperature sensor circuit
DF7172453 Particle filter upstream pressure
DF890297 Movement during particle filter regener*
DF8912146 Group 1 injectors feed
DF8922149 Group 2 injectors feed
DF8952293 Pressure regulation on rail
DF89689 Pressure regulation on pump
DF89790 Pressure regulator circuit on pump
DF8982294 Pressure regulator circuit on rail
DF8993031 Regeneration temperature limit exceeded
DF9971640 Control unit -> thermoplunger connection
DF1020253F Engine oil dilution
DF10691670 Heater plugs not configured
DF118812B Air leak in turbocharging circuit

13B-44
AFTER REPAIRDeal with any other faults. Clear the fault memory.
Switch off the ignition until the end of the power-latch phase, and carry out a road test
followed by a check with the diagnostic tool.
V12 MR-372-J84-13B300$071.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74
DF011
PRESENT
OR
STOREDSENSOR FEED VOLTAGE NO. 1
1.DEF: Above maximum threshold
2.DEF: Below minimum threshold
NOTESConditions for applying the fault finding procedure to a stored fault:
If the fault is declared present after:
– the ignition is switched on.
– starting the engine,
– a road test.
Special notes:
If the fault is present,
– air conditioning is switched off,
– engine torque limited,
– cruise control/speed limiter function is switched off,
– thermoplungers are switched off
– the EGR function is disabled by the engine management computer.
– Safe mode on the accelerator pedal sensor: gang 2 value used instead of gang 1,
– particle filter regenerations when driving are inhibited.
the level 1 and EOBD (European On Board Diagnostic) warning lights are lit.
Use bornier Elé. 1681 for all operations on the engine management computer
connectors.
Use the Wiring Diagram Technical Note, Laguna II ph2, Vel Satis ph2, Espace IV
ph2, Mégane II ph2, Scénic II ph2.
EDC16CP33_V18_DF011 / EDC16CP33_V1C_DF011 / EDC16CP33_V54_DF011 / EDC16CP33_V20_DF011 / EDC16CP33_V58_DF011 /
EDC16CP33_V5C_DF011 / EDC16CP33_V24_DF011 / EDC16CP33_V04_DF011 / EDC16CP33_V08_DF011 / EDC16CP33_V44_DF011 /
EDC16CP33_V4C_DF011 / EDC16CP33_V34_DF011 / EDC16CP33_V38_DF011 / EDC16CP33_V74_DF011 / EDC16CP33_V28_DF011 /
EDC16CP33_V62_DF011/ EDC16CP33_V26_DF011 / EDC16CP33_V60_DF011

13B-47
AFTER REPAIRDeal with any other faults. Clear the fault memory.
Switch off the ignition until the end of the power-latch phase, and carry out a road test
followed by a check with the diagnostic tool.
V12 MR-372-J84-13B300$071.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74
DF012
PRESENT
OR
STOREDSENSOR SUPPLY VOLTAGE NO. 2
1.DEF: Above maximum threshold
2.DEF: Below minimum threshold
NOTESConditions for applying the fault finding procedure to a stored fault:
If the fault is declared present after:
– the ignition is switched on.
– starting the engine,
– a road test.
Special notes:
If the fault is present,
– engine torque limited,
– cruise control/speed limiter function is switched off,
– the thermoplungers are switched off,
– air conditioning is switched off,
– the low speed fan assembly is continuously supplied.
– safe mode on the accelerator pedal sensor: gang 1 value used,
– particle filter regenerations when driving are inhibited.
The level 1 and EOBD (European On Board Diagnostic) warning lights are lit. Use
bornier Elé. 1681 for all operations on the engine management computer connectors.
Use the Wiring Diagram Technical Note, Laguna II ph2, Vel Satis ph2, Espace IV
ph2, Mégane II ph2, Scénic II ph2.
1.DEF
NOTESNone.
Note:
Supply no.2 is for the following components:
– accelerator pedal sensor (gang 2), component code 921,
– EGR valve position sensor, component code 1460 or 169,
– damper valve position sensor, component code 1461,
– cruise control/speed limiter button (button on steering wheel), component code 689,
– refrigerant sensor, component code 1202,
– particle filter differential pressure sensor, component code 1290.
EDC16CP33_V18_DF012 / EDC16CP33_V1C_DF012 / EDC16CP33_V54_DF012 / EDC16CP33_V20_DF012 / EDC16CP33_V58_DF012 /
EDC16CP33_V5C_DF012 / EDC16CP33_V24_DF012 / EDC16CP33_V04_DF012 / EDC16CP33_V08_DF012 / EDC16CP33_V44_DF012 /
EDC16CP33_V4C_DF012 / EDC16CP33_V34_DF012 / EDC16CP33_V38_DF012 / EDC16CP33_V74_DF012 / EDC16CP33_V28_DF012 /
EDC16CP33_V62_DF012/ EDC16CP33_V26_DF012 / EDC16CP33_V60_DF012

13B-212
AFTER REPAIRDeal with any other faults. Clear the fault memory.
Switch off the ignition until the end of the power-latch phase, and carry out a road test
followed by a check with the diagnostic tool.
V12 MR-372-J84-13B300$074.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
DF364
PRESENT
OR
STOREDHEATING AND AIR CONDITIONING SYSTEM
CC.0: Short circuit to earth
CO.1: Open circuit or short circuit to +12 V
CC.0
CO.1
NOTESSpecial notes:
Use bornier Elé. 1681 for all operations on the engine
management computer connectors.
Use the Wiring Diagram Technical Note for Mégane II
ph2 or Scénic II ph2.
Check the heating and air conditioning circuit (see MR 364 (Mégane II ph2), 370 (Scénic II ph2) Mechanical,
62A, Air conditioning).
Check the condition of the refrigerant pressure sensor connector (see Wiring Diagram Technical Note,
Mégane II ph2 or Scénic II ph2, component code 1202).
Check the condition of the engine management computer connector (see Wiring Diagram Technical Note,
Mégane II ph2 or Scénic II ph2, component code 120).
If the connector or connectors are faulty and if there is a repair procedure (see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for repair), repair the connector, otherwise replace the wiring.
Disconnect the battery and the injection computer.
Check the insulation and continuity of the following connections:
•38Y between components 120 and 1202,
•38X between components 120 and 1202,
•38U between components 120 and 1202.
If the connection or connections are faulty and if there is a repair method (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace the wiring.
EDC16CP33_V18_DF364 / EDC16CP33_V1C_DF364 / EDC16CP33_V54_DF364 / EDC16CP33_V20_DF364 / EDC16CP33_V58_DF364 /
EDC16CP33_V5C_DF364 / EDC16CP33_V24_DF364 / EDC16CP33_V04_DF364 / EDC16CP33_V08_DF364 / EDC16CP33_V44_DF364 /
EDC16CP33_V4C_DF364 / EDC16CP33_V34_DF364 / EDC16CP33_V38_DF364 / EDC16CP33_V74_DF364 / EDC16CP33_V28_DF364 /
EDC16CP33_V62_DF364 / EDC16CP33_V26_DF364 / EDC16CP33_V60_DF364
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74

13B-262V12 MR-372-J84-13B300$090.mif
13B
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74
Tool status Diagnostic tool title
ET001+ After ignition computer feed
ET003Engine immobiliser
ET007Pre-postheating control
ET024Thermoplunger no. 1 request
ET025Thermoplunger no. 2 request
ET026Thermoplunger no. 3 request
ET034Clutch signal registered
ET038Engine
ET042Cruise control/speed limiter
ET076Starting
ET077Impact detected
ET079Air conditioning present
ET104Injector code use
ET120Pre-postheating signal
ET143Low-speed fan assembly relay control
ET144High-speed fan assembly relay control
ET205Thermoplunger no. 1 relay control (only on Laguna II ph2 without particle filter)
ET206Thermoplunger no. 2 relay control (only on Laguna II ph2 without particle filter)
ET207Thermoplunger no. 3 relay control (only on Laguna II ph2 without particle filter)
ET238Synchronisation
ET285Injection -> automatic gearbox connection
ET341Immobiliser code programmed
ET405Clutch pedal switch (only for manual gearboxes)
ET415Cruise control/Speed limiter deactivation
ET587Cooling of recirculated exhaust gas
ET589Electric coolant pump control (turbocharger)
ET615Automatic gearbox lever position
ET651EGR programming cut-off
DIESEL INJECTION
Fault finding – Status summary table

13B-283V12 MR-372-J84-13B300$101.mif
DIESEL INJECTION
Fault finding – Interpretation of statuses13B
ET079AIR CONDITIONING PRESENT
STATUS
DEFINITIONYES: This status indicates that air conditioning is present on the vehicle.
NO: This status indicates that air conditioning is not present on the vehicle.
NOTESSpecial notes:
Only perform these tests if the parameters do not correspond with the system
operation programming.
The heating and air conditioning system is present depending on the vehicle's
equipment level.
Conformity check with engine stopped and ignition on, or engine running, and engine coolant
temperature > 80°C
YES or NOYES or NO, depending on the vehicle equipment.
EDC16CP33_V18_ET079 / EDC16CP33_V1C_ET079 / EDC16CP33_V54_ET079 / EDC16CP33_V20_ET079 / EDC16CP33_V58_ET079 /
EDC16CP33_V5C_ET079 / EDC16CP33_V24_ET079 / EDC16CP33_V04_ET079 / EDC16CP33_V08_ET079 / EDC16CP33_V44_ET079 /
EDC16CP33_V4C_ET079 / EDC16CP33_V34_ET079 / EDC16CP33_V38_ET079 / EDC16CP33_V74_ET079 / EDC16CP33_V28_ET079 /
EDC16CP33_V62_ET079 / EDC16CP33_V26_ET079 / EDC16CP33_V60_ET079
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74

13B-286V12 MR-372-J84-13B300$101.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 parameters do not correspond with the system
operation programming.
If the vehicle is fitted with air conditioning, the fan assembly electrical circuit includes
2 relays. The 1
st speed fan assembly relay will be actuated when the engine coolant
temperature exceeds 99°C and its function is to cool the engine so that the engine
temperature does not exceed 102°C. If the engine coolant temperature exceeds 102°C,
the 2
nd speed fan assembly relay will be actuated and the fan will rotate faster.
Use the Wiring Diagram Technical Note, Laguna II ph2, Vel Satis ph2, Espace IV
ph2, Mégane II ph2, Scénic II ph2.
IMPORTANT:
If the vehicle is equipped with air conditioning, the engine cooling fan will operate at 1
st speed as soon as the air
conditioning compressor is activated.
Conformity check with engine stopped and ignition on.
"INACTIVE"Engine cold and air conditioning switched off
In the event of a fault, consult the interpretation of fault DF018 Low speed fan
assembly control circuit.
EDC16CP33_V18_ET143 / EDC16CP33_V1C_ET143 / EDC16CP33_V54_ET143 / EDC16CP33_V20_ET143 / EDC16CP33_V58_ET143 /
EDC16CP33_V5C_ET143 / EDC16CP33_V24_ET143 / EDC16CP33_V04_ET143 / EDC16CP33_V08_ET143 / EDC16CP33_V44_ET143 /
EDC16CP33_V4C_ET143 / EDC16CP33_V34_ET143 / EDC16CP33_V38_ET143 / EDC16CP33_V74_ET143 / EDC16CP33_V28_ET143 /
EDC16CP33_V26_ET143
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 74