RENAULT SCENIC 2009 J84 / 2.G Engine And Peripherals EDC16 User Guide

DIESEL INJECTION
Fault finding – System operation13B
13B - 11V3 MR-372-J84-13B250$135.mif
EDC16
PROGRAM No: C1
Vdiag No.: 51
b) Multiplex connection between the different vehicle computers.
The electronic system fitted in this vehicle is multiplexed.
This 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.
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.
Removal of the internal parts of the pump and injectors is prohibited. Only the fuel flow actuator, the diesel fuel
temperature sensor and the venturi can be replaced.
For safety reasons, it is strictly prohibited to undo a high pressure pipe union 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.
It is forbidden to remove any injection pump pulley bearing the number 070 575. If the pump needs to be replaced,
replace the pulley.
Supplying + 12 V directly to any component in the system 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.WARNING
The engine must not operate with:
–Diesel fuel containing more than 10 % diester,
–petrol, even in tiny quantities.

DIESEL INJECTION
Fault finding – System operation13B
13B - 12V3 MR-372-J84-13B250$135.mif
EDC16
PROGRAM No: C1
Vdiag No.: 51
c) Hosted functions:
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 transitory phases (such as demands for high acceleration when overtaking, anti-stall and start-up) These
conditions are only taken into account when they do not occur repeatedly, to prevent instability in the system
(erratic deactivations),
–when certain faults appear.
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 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 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.

DIESEL INJECTION
Fault finding – System operation13B
13B - 13V3 MR-372-J84-13B250$135.mif
EDC16
PROGRAM No: C1
Vdiag No.: 51
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:
The vehicle cruise control function, when activated, allows you to keep the vehicle speed at a selected value
regardless of the driving conditions encountered.
Using the control buttons, the driver can increase or reduce the speed of the vehicle.
If the driver wishes to exceed the cruising speed, he may:
–depress the accelerator pedal and exceed the cruising speed (the vehicle will return to the initial cruising speed
once the driver takes his 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.
The vehicle will then attempt to reach the cruising speed at a controlled acceleration rate.
It is possible to reactivate the vehicle speed control and resume the last cruising speed after deactivation (computer
supply not cut off).
When activated (using the selection switch) the vehicle speed limiter function limits the vehicle speed to a
preselected value. The driver controls the vehicle in the normal way using the accelerator pedal until the limit speed
is reached.
If an attempt is made to exceed this speed, the system ignores the pedal request and controls the vehicle speed in
the same way as the cruise control function, provided that the driver keeps the accelerator pedal sufficiently
depressed.
Like the cruise control function, the limit speed can be modified by pressing or pressing and holding the control
buttons.
For safety reasons, it is possible to exceed the limit speed by depressing the accelerator pedal and exceeding the
pedal position limit value. The vehicle speed is then totally controlled as a function of pedal position until the speed
falls back below the limit speed when the speed limiter function will once again be reactivated.
If the driver wishes to exceed the cruising speed, he 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:
–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.

DIESEL INJECTION
Fault finding – System operation13B
13B - 14V3 MR-372-J84-13B250$135.mif
EDC16
PROGRAM No: C1
Vdiag No.: 51
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.
Warning light management:
Instrument panel display
The computer manages the data display on the instrument panel relating to engine operation. This involves six
functions:
–the pre-postheating warning light,
–the coolant temperature warning light or warning message;
–the fault level 1 warning light (non-critical fault),
–the fault level 2 warning light (emergency stop),
–the OBD warning light (European On Board Diagnostic).
These five functions are represented by 4 or 5 warning lights and/or messages sent by the trip computer.
A 3 second visual inspection is carried out by the injection computer when ignition is switched on (automatic
procedure for test managed by the instrument panel).
Orange Pre-post heating/non-critical fault SERVICE warning light (level 1)
This light is used both as an in-operation indicator light and as a system fault indicator:
–Continuously lit with + after ignition feed:
Indicates preheating of the spark plugs.
–Continuous lighting accompanied by the message CHECK INJECTION or ELECTRONIC FAULT:
Indicates a level 1 fault (implies operation in injection system defect mode).
The driver should carry out repairs as soon as possible.
Temperature warning light/red EMERGENCY STOP (level 2)
This indicator light is used both as an in-operation indicator light and as a system fault warning light. Lights up for
3 seconds when the ignition is switched on (automatic test procedure managed by the instrument panel):
–Continuously lit or alternately lit with ENGINE OVERHEATING message:
Indicates engine overheating (the driver is free to choose whether or not to stop the vehicle).
–Continuously lit with the FAULTY INJECTION message:
Indicates a level 2 fault (In this case, the injection is automatically cut after a few seconds).
The driver should carry out repairs as soon as possible.
ORANGE OBD excess pollution warning light
An engine symbol accompanied by the message CHECK EMISSION CONTROL.
This warning light comes on if the system has one or more OBD faults.
This warning light is used to warn the driver of injection faults leading to excessive pollution or that the EOBD* system
has been deactivated.
The injection computer requests activation of the OBD warning light for a present fault only after three successive
driving cycles.
A 3 second visual inspection is carried out by the injection computer when ignition is switched on (automatic
procedure for test managed by the instrument panel).
*EOBD: Electronic on board diagnostics.

DIESEL INJECTION
Fault finding – System operation13B
13B - 15V3 MR-372-J84-13B250$135.mif
EDC16
PROGRAM No: C1
Vdiag No.: 51
EOBD* management:
The OBD (On Board Diagnostic) system enables the detection of any faults relating to the vehicle emission control
system (OBD EURO IV emission control standards exceeded).
This system should be active for the entire life of the vehicle.
1. Conditions causing an OBD fault
An OBD fault will be detected after 3 driving cycles and the following parameters will be registered in the computer:
–engine load,
–vehicle speed
–air temperature
–coolant temperature,
–turbocharging pressure,
–rail pressure,
–air flow,
–distance travelled in miles by the vehicle since activation of the OBD warning light.
It allows the driver to know whether the vehicle has a fault directly linked to the emission control system.
2. System faults indicated by the OBD
Only a few faults are indicated by the OBD system:
–DF001 Coolant temperature sensor circuit.
–DF003 Atmospheric pressure sensor circuit.
–DF011 Sensor feed voltage no. 1.
–DF012 Sensor feed voltage no. 2.
–DF013 Sensor feed voltage no. 3.
–DF038 Computer in 6.DEF EEPROM fault.
–DF040 Cylinder 1 injector circuit in CO Open circuit.
–DF041 Cylinder 2 injector circuit in CO Open circuit.
–DF042 Cylinder 3 injector circuit in CO Open circuit.
–DF043 Cylinder 4 injector circuit in CO Open circuit.
–DF054 Turbocharging solenoid valve control circuit in CC.0 Short circuit to earth.
–DF056 Air flow sensor circuit.
–DF209 EGR valve position sensor circuit.
–DF621 EGR valve jammed open.
Some repair operations require programming to ensure that certain engine components function correctly.
Follow the programming procedures (see Replacement of components), if replacing the exhaust gas
recirculation valve or an injector.
*EOBD: Electronic on board diagnostics

DIESEL INJECTION
Fault finding – System operation13B
13B - 16V3 MR-372-J84-13B250$135.mif
EDC16
PROGRAM No: C1
Vdiag No.: 51
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 needs to
go 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.

DIESEL INJECTION
Fault finding – Allocation of computer tracks13B
13B - 17V3 MR-372-J84-13B250$180.mif
EDC16
PROGRAM No: C1
Vdiag No.: 51DIESEL INJECTION
Fault finding – Allocation of computer tracks
1 - black connector A, 32 tracks 1 - black connector A, 32 tracks (continued)
Track Description
A1Not used
A2Cruise control on/off switch
A3Passenger compartment L1 multiplex
line network signal
A4Passenger compartment H1 multiplex
line network signal
B1Air conditioning inhibition control
B2Engine speed signal
B3Not used
B4K line diagnostic socket output
C1Not used
C2Not used
C3Speed limiter on/off switch
C4Clutch contact input
D1Protection and Switching Unit supply
(+ after ignition feed)
D2Cruise control programming control
D3Cruise control programming feedback
signal
D4Fuel flow signal
E1Not used
E2Air conditioning cycle control
E3Not used
E4Normally-closed brake switch input
F1Not used
F2Accelerator potentiometer load 2
supply
F3Accelerator potentiometer load 2 signal
F4Accelerator potentiometer load 2 earth
Track Description
G1Protection and Switching Unit supply
(+ BAT 1 after relay)
G2Accelerator potentiometer load 1
supply
G3Not used
G4Battery earth
H1Battery earth
H2Accelerator potentiometer load 1 signal
H3Accelerator potentiometer load 1 earth
H4Battery earth
MR-372-J84-13B250$180.mif

DIESEL INJECTION
Fault finding – Allocation of computer tracks13B
13B - 18V3 MR-372-J84-13B250$180.mif
EDC16
PROGRAM No: C1
Vdiag No.: 51
2 - brown connector B, 48 tracks 2 - Brown 48-track connector B (continued)
Track Description
A1Camshaft sensor earth (cylinder 1
reference)
A2Not used
A3Not used
A4Fuel rail pressure sensor supply
B1TDC sensor supply signal (engine
speed)
B2Damper valve fault finding
B3Not used
B4Air flow sensor supply
C1TDC sensor earth signal (engine
speed)
C2EGR valve engine supply signal
C3Engine CAN H2 network signal
(automatic gearbox)
C4Fuel rail pressure sensor earth
D1Camshaft sensor signal (cylinder
reference 1)
D2EGR valve engine earth signal
D3Engine CAN L2 network signal
(automatic gearbox)
D4Turbocharger pressure sensor earth
E1Main power supply relay control
E2Air temperature and air flow sensor
earth signal
E3Not used
E4Not used
F1Refrigerant pressure sensor signal
F2Coolant temperature sensor supply
signal
F3Refrigerant pressure sensor supply
F4EGR valve position potentiometer feed
Track Description
G1Air flow sensor supply signal
G2Air temperature signal
G3Fuel rail pressure sensor signal
G4Turbocharging pressure sensor supply
H1Coolant temperature sensor earth
H2Not used
H3Not used
H4Electric coolant pump relay control
J1Not used
J2EGR valve position potentiometer
signal
J3Not used
J4Damper valve solenoid valve control
K1Not used
K2Turbocharger pressure sensor signal
K3Not used
K4Not used
L1Not used
L2Not used
L3Not used
L4Flow sensor earth
M1Not used
M2Protection and Switching Unit supply
(+ BAT 2 after relay)
M3Not used
M4Fuel pressure regulation solenoid valve
control (fuel flow actuator)

DIESEL INJECTION
Fault finding – Allocation of computer tracks13B
13B - 19V3 MR-372-J84-13B250$180.mif
EDC16
PROGRAM No: C1
Vdiag No.: 51
3 - Grey 32-track connector C
Track Description
A1Not used
A2Water in diesel detection sensor signal
A3Alternator charge signal
A4Preheating unit diagnostic signal
B1Not used
B2Not used
B3Not used
B4Not used
C1Not used
C2EGR valve position potentiometer earth
C3Refrigerant pressure sensor earth
C4Not used
D1Not used
D2Not used
D3Not used
D4Not used
E1Turbocharging pressure solenoid valve control
E2Preheating unit control
E3Not used
E4Not used
F1Not used
F2Not used
F3Not used
F4Not used
G1Injector 4 feed
G2Injector 2 feed
G3Injector 1 control
G4Injector 2 control
H1Injector 1 feed
H2Injector 3 feed
H3Injector 4 control
H4Injector 3 control

DIESEL INJECTION
Fault finding – Replacement of components13B
13B-20V3 MR-372-J84-13B250$225.mif
EDC16
PROGRAM No: C1
Vdiag No.: 51DIESEL INJECTION
Fault finding – Replacement of components
COMPUTER REPLACEMENT OR REPROGRAMMING
Operations to be carried out before reprogramming the injection computer:
Before reprogramming the injection computer, move the main CC/SL switch to the rest position. The information
about the cruise control or the speed limiter displayed on the instrument panel disappears.
Otherwise, if the main switch remains in the cruise control or speed limiter position during and after reprogramming,
the Cruise control/Speed limiter function will not be operational.
The procedure for resetting the function is as follows:
–Vehicle ignition on.
–Move the cruise control/speed limiter switch to the rest position (the computer detects the rest position at that
moment).
–Move the cruise control/speed limiter switch to the Cruise control position to activate the Cruise control function.
–Move the cruise control/speed limiter switch to the Speed limiter position to activate the Speed limiter function.
Two operations must be performed when replacing or reprogramming the computer:
SC003 Save computer data and SC001 Enter saved data.
–Use SC003 before the computer is replaced or reprogrammed. This enables certain data to be saved in the
diagnostic tool so that the new computer* can be reconfigured like the old one. The saved data are: injector
codes, EGR programming, vehicle options.
–Run SC001 after the computer is replaced or reprogrammed. It enables you to rewrite the data (saved by
command SC003) to the new computer*.
If you cannot establish dialogue with the computer being replaced: you will not be able to save anything. After
replacing the computer, enter the IMA code of each injector manually, reading the code on each injector (see
INJECTOR REPLACEMENT).
Exhaust gas recirculation valve data is programmed automatically the 1
st time the new computer is switched on*.
* new computer or reprogrammed computer. IMPORTANT
–Switch on the diagnostic tool (mains or cigarette lighter supply).
–Connect a battery charger.
–Switch off all electrical consumers (lights, interior lights, air conditioning, radio/CD, etc.).
–Wait for the engine to cool (engine coolant temperature < 60˚ and air temperature < 50˚).
–The GMV are activated automatically when the computer is being reprogrammed.