2011 RENAULT SCENIC heating

13B - 10
DIESEL INJECTION
Fault finding - System operation13B
V10 MR-372-J84-13B150$094.mif
EDC16 INJECTION
Program No.: C1
Vdiag No: 44, 48 and 4C
a) The computer
– Determines the value of injection pressure necessary for the engine to operate correctly and then controls the
pressure regulator.
– It checks that the pressure value is correct by analysing the value transmitted by the pressure sensor located on
the rail.
– It determines the injection timing 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 flow injected into the engine is determined by:
– the duration of injector control,
– the rail pressure (regulated by the computer),
– the injector opening and closing speed,
– the needle stroke (determined by a constant for the type of injector),
– the nominal hydraulic flow of the injector (specific to each injector).
The computer manages:
– idling regulation,
– exhaust gas flow reinjection to the inlet,
– fuel supply check (advance, flow and rail pressure),
– the fan assembly via the Protection and Switching Unit (centralised coolant temperature management
function),
– the air conditioning (cold loop function),
– the cruise control/speed limiter function,
– the pre-postheating control.
– the fault warning lights via the multiplex network.
The high pressure pump is supplied at low pressure by an integrated low-pressure pump (transfer pump).
It supplies the rail, the pressure of which is controlled by the fuel flow actuator for charging, and for discharging by
the injector valves. This compensates for pressure drops.
The fuel flow actuator enables the high pressure pump to supply the exact quantity of diesel fuel required to maintain
the rail pressure. This component minimises the heat generated and improves engine output.
In order to discharge the rail using the injector valves, the valves are controlled by brief electrical pulses which are:
– short enough not to open the injector (passing through the feedback circuit from the injectors),
– long enough to open the valves and discharge the rail.

13B - 13
DIESEL INJECTION
Fault finding - System operation13B
V10 MR-372-J84-13B150$094.mif
EDC16 INJECTION
Program No.: C1
Vdiag No: 44, 48 and 4C
Passenger Compartment Heating Resistor Management
In order to reduce the time required to heat up the passenger compartment, the vehicle is fitted with Passenger
Compartment Heating resistors (RCH). These passenger compartment heating resistors are run and controlled by
the UCH.
The injection computer authorises or prohibits the operation of the passenger compartment heating resistors
according to the operating phases and engine power needs.
Cruise control/speed limiter management
When activated, the cruise control function maintains the vehicle at a preselected speed, regardless of the driving
conditions encountered.
If the driver wishes to exceed the cruising speed, they may:
– depress the accelerator pedal and exceed the cruising speed (the vehicle will return to the initial
cruising speed once the driver takes their foot off the pedal),
– press the system control buttons.
The cruise control function can be deselected either by:
– the system control buttons,
– deactivating the cruise control switch,
– when system events are detected, such as the brake pedal or clutch being depressed,
– when system errors are detected such as an inconsistent vehicle speed.
The cruise function can also be temporarily disabled when the driver wants to increase speed by depressing the
accelerator pedal. The cruising speed is resumed when the driver releases the accelerator pedal.
It is possible to reactivate the vehicle speed control and resume the last cruising speed after deactivation (computer
supply not cut off).
The vehicle speed limiter function enables, when it is active (switch turned on), the vehicle speed to be limited to
a preselected value. The driver controls the vehicle in the normal way using the accelerator pedal until the limit
speed is reached.
If the driver wishes to exceed the cruising speed, they may:
– exceed the accelerator pedal's kickdown point,
– increase the limit speed by pressing or pressing and holding the limit speed switch.
The speed limiter function can be deselected either:
– by using the system control buttons,
– by switching off the speed limiter switch,
– when system events are detected, such as the brake pedal or clutch being depressed,
– when system errors are detected such as an inconsistent vehicle speed.

13B - 14
DIESEL INJECTION
Fault finding - System operation13B
V10 MR-372-J84-13B150$094.mif
EDC16 INJECTION
Program No.: C1
Vdiag No: 44, 48 and 4C
c) Warning light management
Instrument panel display
The computer manages the data display on the instrument panel relating to engine operation. This involves
5 functions:
– the OBD warning light (European On Board Diagnostic),
– pre/postheating warning light,
– the coolant temperature warning light,
– the fault level 1 warning light (non-critical fault),
– the fault level 2 warning light (stop immediately).
These five functions are represented by 3 warning lights or messages sent by the trip computer.
Pre/postheating indicator light
This warning light is used both as an in operation indicator light and as a system fault indicator:
– continuously lit under + after ignition feed: indicates that the heater plugs are operating,
– continuously lit with injection faulty: indicates a level 1 fault (involves injection system operating in defect
mode. The user must carry out repairs as soon as possible).
Temperature/emergency stop warning light
This indicator light is used both as an in-operation indicator light and as a system fault warning light. It lights up for
3 seconds after the ignition is switched on (automatic test procedure managed by the instrument panel).
– continuously lit: indicates engine overheating (the driver remains free to stop the vehicle or not),
– continuously lit, with the Engine stop message: indicates a level 2 fault (In this case injection is
automatically shut off after a few seconds).
Excess pollution OBD orange warning light
An engine symbol lights up for approximately 3 seconds when the engine is switched on.
For the Vdiag 44 and 48, it only lights up when the engine is running.
In Vdiag 4C, this warning light comes on if the system has one or more OBD faults.

13B - 16
DIESEL INJECTION
Fault finding - System operation13B
V10 MR-372-J84-13B150$094.mif
EDC16 INJECTION
Program No.: C1
Vdiag No: 44, 48 and 4C
3. Conditions for clearing an OBD fault
An OBD fault is cleared in several steps.
The fault present in the diagnostic tool is not stored (following repair) until after 3 trips with the vehicle.
The OBD warning light will only light up after these 3 driving cycles.
The warning light coming on does not always mean that there is a fault on the system.
In order that the OBD fault and the display parameters are cleared from the computer, the system goes
through 40 engine heating cycles.
An engine heating cycle is a driving cycle during which:
–the engine coolant temperature reaches at least 71.1 °C,
–the engine coolant temperature varies by 22.2 °C in relation to the engine starting temperature.
If one of these conditions is not fulfilled, the OBD fault will still be present or stored in the injection
computer.

13B - 19
DIESEL INJECTION
Fault finding - Allocation of computer tracks13B
V10 MR-372-J84-13B150$141.mif
EDC16 INJECTION
Program No.: C1
Vdiag No: 44, 48 and 4C
3 - Grey connector C, 32-track
Track Description
A1 Not used
A2 Water in diesel detection sensor signal
A3 Not used
A4 Preheating relay fault finding signal
B1 Not used
B2 Not used
B3 Not used
B4 Not used
C1 Not used
C2 EGR solenoid valve earth
C3 Refrigerant pressure sensor earth
C4 Not used
D1 Not used
D2 Not used
D3 Not used
D4 Not used
E1 Turbocharging pressure solenoid valve
control
E2 Preheating relay control
E3 Not used
E4 Not used
F1 Fuel temperature earth
F2 Not used
F3 Not used
F4 Not used
G1 Injector 4 control
G2 Injector 2 control
G3 Injector 1 earth
G4 Injector 2 earth
H1 Injector 1 control
H2 Injector 3 control
H3 Injector 4 earth
H4 Injector 3 earth

13B - 23
DIESEL INJECTION
Fault finding - Fault summary table13B
V10 MR-372-J84-13B150$235.mif
EDC16 INJECTION
Program No.: C1
Vdiag No.: 44, 48 and 4CDIESEL INJECTION
Fault finding - Fault summary table
WARNING LIGHT MANAGEMENT
Management of instrument panel warning lights according to the faults notified.
Tool
fault
Associated
DTCDiagnostic tool titleLevel 1 fault
warning light
(Orange heater
plugs “on”
indicator light)Level 2 fault
warning light (Red
overheating
warning light)No fault
warning
light litOBD
warning
light lit
DF001 115Coolant temperature sensor
circuitCO.1/CC.0 ... ... ...
DF003 105Atmospheric pressure sensor
circuit1.DEF / 2.DEF /
3.DEF... ... ...
DF004 235Turbocharging pressure sensor
circuitCO.0 / CC.1 ... 1.DEF ...
DF005 335Engine speed sensor circuit ... ... 1.DEF/2.DEF ...
DF007 190Rail pressure sensor circuit CO.1 / 1.DEF /
2.DEFCC.0 ...
DF008 225Pedal potentiometer circuit
gang 1CO.0/CC.1/
1.DEF/2.DEF... ... ...
DF009 2120Pedal potentiometer circuit
gang 2CO.0/CC.1/
1.DEF... ... ...
DF011 641Sensor feed voltage no. 1 1.DEF/2.DEF ... ... ...
DF012 651Sensor feed voltage no. 2 1.DEF/2.DEF ... ... 1.DEF/
2.DEF
DF013 697Sensor feed voltage no. 3 ... 1.DEF/2.DEF ... ...
DF015 685Main relay control circuit ... ... 1.DEF/2.DEF ...
DF017 380Pre-postheating unit control
circuitCC.0 ... CC.1/CO/
1.DEF...
DF025 670Preheating unit diagnostic line ... X ...
DF037 C167Engine immobiliser ... X ...
DF038 606Computer 5.DEF / 13.DEF 1.DEF / 2.DEF /
3.DEF / 4.DEF /
6.DEF / 7.DEF /
8.DEF / 9.DEF /
10.DEF / 11.DEF /
12.DEF... 5.DEF
DF039 110Inlet air temperature sensor
circuit... ... CC.0/CO.1/
1.DEF...
MR-372-J84-13B150$235.mif

13B - 24
DIESEL INJECTION
Fault finding - Fault summary table13B
V10 MR-372-J84-13B150$235.mif
EDC16 INJECTION
Program No.: C1
Vdiag No.: 44, 48 and 4C
Tool
faultAssociated
DTCDiagnostic tool titleLevel 1
fault warning
light (Orange
heater plugs
“on” indicator
light)Level 2 fault
warning light
(Red overheating
warning light)No fault
warning
light litOBD
warning
light lit
DF040 201Cylinder 1 injector circuit CO CC.1 / CC / 1.DEF ... CO
DF041 202Cylinder 2 injector circuit CO CC.1 / CC / 1.DEF ... CO
DF042 203Cylinder 3 injector circuit CO CC.1 / CC / 1.DEF ... CO
DF043 204Cylinder 4 injector circuit CO CC.1 / CC / 1.DEF ... CO
DF046 560Battery voltage ... ... 1.DEF/2.DEF ...
DF047 615Computer feed voltage ... ... X ...
DF049 530Refrigerant sensor circuit ... ... CC.1/CO.0 ...
DF050 571Brake switch circuit ... ... 1.DEF/2.DEF ...
DF051 575Cruise control/speed limiter
function... ... 1.DEF /
2.DEF /
3.DEF...
DF053 89Rail pressure regulation function 3.DEF / 8.DEF CC.0 / CC.1 / CO /
1.DEF / 2.DEF /
5.DEF / 6.DEF / 7.DEF4.DEF ...
DF054 33Turbocharging solenoid valve
control circuitCO/CC.0/CC.1/
1.DEF... ... ...
DF055 243Turbocharging pressure
regulation circuit1.DEF/2.DEF ... ... ...
DF056 100Air flow sensor circuit 3.DEF/4.DEF ... CC.0/CC.1/
1.DEF/2.DEF
DF057 2264Water in diesel fuel detector
circuit... ... X ...
DF067 638Damper control circuit ...
CC.0OC / CC.1 /
1.DEF...
DF069 1620Impact detected signal X
DF070 830Clutch switch circuit ... ... 1.DEF/2.DEF ...

13B - 25
DIESEL INJECTION
Fault finding - Fault summary table13B
V10 MR-372-J84-13B150$235.mif
EDC16 INJECTION
Program No.: C1
Vdiag No.: 44, 48 and 4C
FAULT WARNING LIGHT MANAGEMENT (continued)
Tool
fault
Associated
DTCDiagnostic tool titleLevel 1
fault warning
light (Orange
heater plugs
“on” indicator
light)Level 2 fault
warning light
(Red overheating
warning light)No fault
warning
light litOBD
warning
light lit
DF091 500Vehicle speed signal ... ... 1.DEF/
2.DEF/
3.DEF/
4.DEF/5.DEF...
DF097 340Camshaft sensor circuit 1.DEF/2.DEF
DF098 180Fuel temperature sensor circuit ... ... CC.0 / CO.1
DF114 400EGR solenoid valve circuit ... ... 1.DEF/2.DEF
DF118 409EGR solenoid valve servo-
control... ... 1.DEF/2.DEF ...
DF119 365Camshaft sensor signal ... ... 1.DEF/2.DEF ...
DF120 385Engine speed sensor signal ... 1.DEF/2.DEF ...
DF209 486EGR valve position sensor circuit 1.DEF CC.1/CO.0
DF250 C122ESP function ... ... 1.DEF/2.DEF ...
DF272 403EGR valve control circuit CC.0 CC.1 / CO/
1.DEFCC.0
DF276 611Injector code programming 1.DEF/2.DEF
DF530 148AEGR programming adaptives X
DF619 487EGR valve jammed open X ... ... ...
DF620 148BEGR valve fouled X ... ... ...
DF621 2413EGR valve is jammed open
(OBD fault)... ... ... X
DF622 2142EGR valve jammed open ... ... X ...
DF1070 534Cold loop