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

13B-16
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
Exhaust gas recirculation management
The exhaust gas recirculation system comprises a direct current EGR valve controlled by an H bridge in the
computer. This system has a built-in valve position feedback potentiometer.
The EGR valve is controlled in a closed loop on the change in the air flow measured by the flow sensor.
The potentiometer is used in the fault finding procedure for the EGR valve position.
Catalysed particle filter management:
The particle filter prevents the escape of carbon particles emitted by the engine but not yet removed from the
exhaust gases.
The particle filter is a microporous structure containing channels arranged so as to force-filter the exhaust gases.
The exhaust system consists of several components:
– an oxidation catalytic converter mounted after the turbocharger. This catalytic converter ensures that HC/CO
levels meet current standards by generating the heat (rise in exhaust temperature caused by catalysis) required
for particle filter regeneration,
– a catalysed particle filter located under the bodywork;
– A differential pressure sensor to inform the computer about the pressures upstream and downstream of the
particle filter and a temperature sensor upstream and downstream of the particle filter,
– a turbine upstream temperature sensor.
As the vehicle is being driven, the particle filter gets loaded with particles (soot). Using a given weight of soot
determined by computer mapping, regeneration mode can be triggered when the maximum weight of soot in the
particle filter is reached and the correct engine operating conditions are met (coolant temperature, etc.).
Particle filter regeneration consists of burning the particles of soot that have accumulated in the filter.
The differential pressure sensor measures the particle filter inlet/outlet pressure difference, this value makes it
possible to calculate the weight of soot present in the particle filter using computer mapping: (soot weight = pressure
differential depending on the exhaust volume flow rate).
If all the criteria are met, the computer enters regeneration mode. The injection programming is then adjusted in
order to raise the target exhaust gas temperature between 550 and 650°C.
This temperature allows the particles accumulated in the filter to be partially or completely burnt (regenerated).
Regeneration efficiency depends on the particle filter inlet temperature and the time spent in regeneration mode.
Regeneration may be automatically triggered when driving if the soot content is below:
Vdiag 58 and 5C: 74 g for Scénic II F9Q804
66 g for Mégane II F9Q804
66 g for Scénic F9Q803
Vdiag 50: 45 g for Scénic II and Mégane II
If the weight of soot is greater than the values above or if regeneration when driving has not been carried out, the
user will have to request an After-Sales regeneration.
Regeneration may be carried out automatically when driving if the weight of soot is less than 56 g and if the number
of regeneration attempts when driving is less than 10 (only for Vdiag 1C and 20).

13B-32
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
DF315Particle filter diff.*
pressure sensor 470CO/CO.0/
CC.1/1.DEF
2.DEFCO/CO.0/
CC.1/
1.DEF/
2.DEF
DF485Catalytic converter
fault finding422 X …
DF504Automatic
transmissionC101 1.DEF 1.DEF
DF532Alternator charge
signal2502CC.0/CC.1/
1.DEF/
2.DEF
DF619EGR valve jammed
open2142 X
DF620EGR valve fouled 2141 X
DF621EGR valve is jammed
open (OBD fault)2413 X X
DF652Turbine upstream
temperature sensor
circuit242ACO/CC.0/
CO.1/ CC.1/
1.DEF
DF717Particle filter
upstream pressure1480 1.DEF 1.DEF
DF778Turbine upstream
temperature control242B1.DEF/
2.DEF
DF890Movement drg*
particle filter regen.*0297 X
DF899Regeneration
temperature limit
exceeded 3031 X
DF953Particle filter absent 2002 X X
DF1070Cold loop 534

13B-146
MR-372-J84-13B200$360.mif
V13
DIESEL INJECTION
Fault finding – Interpretation of faults
EDC16
Program No.: C1
Vdiag no.: 18, 1C, 20,
50, 58, 5C
13B
DF485
PRESENT
OR
STOREDCATALYTIC CONVERTER FAULT FINDING
NOTESConditions for applying the fault finding procedure to a stored fault:
The fault occurs during After-Sales regeneration using the diagnostic tool when the
particle filter upstream temperature is less than 450°C.
Special notes:
If the fault is present, particle filter regenerations are not possible.
Use bornier Ele. 1681 for all operations on the engine management computer
connector.
The oxidation catalytic converter does not produce enough heat at the particle filter inlet to regenerate the particle
filter.
Replace the catalytic converter.
Check that there are no leaks or blockages in the exhaust pipe,
Repair if necessary
Run command SC017 Particle filter regeneration.
If the fault is still present, contact the Techline.
AFTER REPAIRDeal with any faults.
Carry out a road test followed by another check with the diagnostic tool.
EDC16_V50_DF485/EDC16_V58_DF485/EDC16_V5C_DF485/EDC16_V18_DF485/EDC16_V1C_DF485/EDC16_V20_DF485

13B-339
MR-372-J84-13B200$900.mif
V13
13B
DIESEL INJECTION
Fault finding – Tests
TEST 1 Exhaust system check
Engine stopped:
Check that the silencer outlet is not blocked.
Repair or replace the silencer, if necessary.
Check the seal of the exhaust manifold on the contact
surface between the turbocharger and the exhaust
manifold.
Is the seal in order?
YES
Loosen the catalytic converter on the turbocharger side.
Place a wooden block between the two parts.
Start the vehicle and check if the engine runs better.
Is the engine running normally?
YES
A
NORepair or replace the faulty part.
NOThe exhaust pipe is not the cause
of the fault, continue with the
engine fault finding procedure (see
Customer complaints).
EDC16_V50_TEST1/EDC16_V58_TEST1/EDC16_V5C_TEST1/EDC16_V18_TEST1/EDC16_V1C_TEST1/EDC16_V20_TEST1 EDC16
Program No.: C1
Vdiag no.: 18, 1C, 20,
50, 58, 5C
MR-372-J84-13B200$900.mif

13B-340
MR-372-J84-13B200$900.mif
V13
EDC16
Program No.: C1
Vdiag no.: 18, 1C, 20,
50, 58, 5CDIESEL INJECTION
Fault finding – Tests13B
TEST 1
CONTINUED
Retighten the catalytic converter.
Loosen or uncouple the particle filter on the catalytic
converter side. Place a wooden block between the two
parts if necessary.
Start the vehicle and check if the engine runs better.
Is the engine running normally?Replace the catalytic converter.
Retighten the particle filter.
Loosen or uncouple the silencer on the particle filter side
(see MR 364 (Mégane II), 370 (Scénic II) or 395 (Laguna
II), Mechanical, 19B Exhaust, Parts and consumables
for repair).
Start the vehicle and check if the engine runs better.
Is the engine running normally?Replace the particle filter (see MR
364 (Mégane II), 370 (Scénic II) or
395 (Laguna II), Mechanical, 19B
Exhaust, Particle filter, Removal –
Refitting).
After any operation on the particle
filter, reinitialise the parameters.
Run command SC036 Reinitialise
programming and select After
particle filter replacement.
Check the weight of soot: if PR383
Weight of soot in the particle filter
≥ 1 g. Apply the procedure for test 8
Manual clearing of the soot weight.
Replace the silencer.
A
YES
NO
YES
NO
YES