engine overheat RENAULT SCENIC 2011 J95 / 3.G Engine And Peripherals EDC16 Injection Workshop Manual

13B - 12
DIESEL INJECTION
Fault finding - System operation13B
V10 MR-372-J84-13B150$094.mif
EDC16 INJECTION
Program No.: C1
Vdiag No: 44, 48 and 4C
b) Functions included
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 transition phases (e.g. high acceleration demand for overtaking, anti-stalling and moving off). These
conditions are only taken into account if they do not occur repeatedly, so as to prevent system instabilities (erratic
deactivation),
– when certain faults appear.
Cold loop air conditioning management
The air conditioning is cold loop managed, 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 fan assembly, from the UPC, according to the vehicle speed, the refrigerant pressure
and the engine coolant temperature.

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 - 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 - 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

13B-152
DIESEL INJECTION
Fault finding - Interpretation of statuses13B
V10 MR-372-J84-13B150$564.mif
EDC16 INJECTION
Program No.: C1
Vdiag No.: 44, 48 and 4C
ET014
FAN ASSEMBLY 1 CHECK
NOTESOnly perform the tests if the statuses do not correspond with the system programming
functions.
Note: Status ET022 Low-speed engine fan request and status ET014 Engine fan assembly check 1 change
their status at the same time.
RUNNING
The low-speed fan assembly is supplied in three scenarios:
– the engine coolant temperature is above 89°C,
– the air conditioning is operating,
– the injection computer has system faults that could lead to the engine overheating.
When the low-speed fan assembly is supplied:
– status ET014 changes to RUNNING
– status ET022 low-speed engine fan request changes to ACTIVE.
In the event that the low-speed engine fan does not work, refer to the UPC fault finding note.
STOPPED
The low-speed fan assembly stops when:
– the engine coolant temperature is below 89°C,
– no air conditioning request made by the driver.
IMPORTANT!WARNING
If the UPC does not detect the injection computer frames, the low-speed engine
fan assembly is supplied until the battery is completely discharged.
In the event that the low-speed engine fan assembly is defective, the high-speed
engine fan assembly will then be activated.
AFTER REPAIRCarry out a road test followed by another check with the diagnostic tool.
EDC16_V44_ET014/EDC16_V48_ET014/EDC16_V4C_ET014

13B-153
DIESEL INJECTION
Fault finding - Interpretation of statuses13B
V10 MR-372-J84-13B150$564.mif
EDC16 INJECTION
Program No.: C1
Vdiag No.: 44, 48 and 4C
ET015
FAN ASSEMBLY 2 CHECK
NOTESOnly perform the tests if the statuses do not correspond with the system programming
functions.
Note: Status ET015 Engine fan assembly 2 and status ET021 High-speed engine fan request change their
status at the same time.
RUNNING
The engine fan assembly can be supplied when:
– the engine coolant temperature is above 99°C.
– the injection computer has system faults that could lead to the engine overheating.
When the high speed fan is supplied:
– status ET015 changes to RUNNING
– status ET021 low-speed engine fan request changes to ACTIVE.
In the event that the high-speed engine fan does not work, refer to the UPC fault finding note.
STOPPED
The high-speed fan assembly stops when:
– the engine coolant temperature is below 99°C;
IMPORTANT!WARNING
If the UPC does not detect the injection computer frames, the low speed engine
fan is supplied until the battery is completely discharged.
In the event that the low-speed engine fan assembly is defective, the high-speed
engine fan assembly will then be activated.
AFTER REPAIRCarry out a road test followed by another check with the diagnostic tool.
EDC16_V44_ET015/EDC16_V48_ET015/EDC16_V4C_ET015

13B-154
DIESEL INJECTION
Fault finding - Interpretation of statuses13B
V10 MR-372-J84-13B150$564.mif
EDC16 INJECTION
Program No.: C1
Vdiag No.: 44, 48 and 4C
ET021
HIGH-SPEED FAN REQUEST
NOTESOnly perform the tests if the statuses do not correspond with the system programming
functions.
Note: Status ET021 High-speed engine fan assembly request and status ET015 High-speed engine fan 2
test change their status at the same time.
ACTIVE
The injection computer requests the activation of the high speed GMV when:
– the engine coolant temperature is above 99°C.
– the injection computer has system faults that could lead to the engine overheating.
When the high speed fan is supplied:
– status ET021 High-speed engine fan request changes to ACTIVE.
– status ET015 changes to RUNNING
In the event that the high-speed engine fan does not work, refer to the UPC fault finding note.
STOPPED
The high-speed fan assembly stops when:
– the engine coolant temperature is below 99°C;
– no fault which could cause engine overheating is present in the injection system.
IMPORTANT!WARNING
If the UPC does not detect the injection computer frames, the low speed engine
fan is supplied until the battery is completely discharged.
In the event that the low-speed engine fan assembly is defective, the high-speed
engine fan assembly will then be activated.
AFTER REPAIRCarry out a road test followed by another check with the diagnostic tool.
EDC16_V44_ET021/EDC16_V48_ET021/EDC16_V4C_ET021

13B-155
DIESEL INJECTION
Fault finding - Interpretation of statuses13B
V10 MR-372-J84-13B150$564.mif
EDC16 INJECTION
Program No.: C1
Vdiag No.: 44, 48 and 4C
Note: Status ET022 Low-speed engine fan request and status ET014 Engine fan assembly check 1 change
their status at the same time.ET022
LOW-SPEED FAN REQUEST
NOTESOnly perform the tests if the statuses do not correspond with the system programming
functions.
ACTIVE
The injection computer requests the activation of the low speed GMV when:
– the engine coolant temperature is above 89°C,
– the injection computer has system faults that could lead to the engine overheating,
– the air conditioning is switched on by the driver.
When the high speed fan is supplied:
– status ET022 High-speed engine fan request changes to ACTIVE,
– status ET014 changes to RUNNING.
In the event that the low-speed engine fan does not work, refer to the UPC fault finding note.
STOPPED
The low-speed fan assembly stops when:
– the engine coolant temperature is below 89°C,
– no fault which could cause engine overheating is present in the injection system.
– the air conditioning is not switched on by the driver.
IMPORTANT!WARNING
If the UPC does not detect the injection computer frames, the low speed engine
fan is supplied until the battery is completely discharged.
In the event that the low-speed engine fan assembly is defective, the high-speed
engine fan assembly will then be activated.
AFTER REPAIRCarry out a road test followed by another check with the diagnostic tool.
EDC16_V44_ET022/EDC16_V48_ET022/EDC16_V4C_ET022

13B-208
MR-372-J84-13B150$846.mif
V10
DIESEL INJECTION
Fault finding - Fault finding chart13B
ALP 4 Poor performance
NOTESBefore dealing with 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.
IMPORTANT
In the event of the engine overheating above 11 0 ° C, the computer deliberately limits the fuel flow, and supplies
the fan assembly until the battery is completely discharged.
Is the poor performance accompanied by smoke?
YES
Check:
– That the EGR valve is not jammed in the open position.
– That the injectors are properly mounted (presence and conformity of the sealing washer).
Is the engine running on all cylinders?
NO
Check that the injectors are operating correctly. (See Test 1)
If the fault is still present
Check the conformity of the accelerator pedal position sensor, the brake pedal sensor, the atmospheric pressure
sensor and the EGR valve.
– Check the condition of the air filter.
– Check the consistency of the signal: from the flow sensor or the pressure/air temperature sensor, engine coolant
temperature sensor, fuel temperature sensor, engine speed.
No foreign bodies on the flowmeter grille (visual inspection only).
Check:
– That the diesel filter is not clogged.
– That there are no leaks in the low pressure and high pressure diesel circuits;
– that the air inlet circuit is complete (sealed and not obstructed),
– That the oil vapour rebreathing system is connected.
– The flow regulator (jammed/seized, consult the interpretation of command AC011 Rail pressure
regulator).
– The turbocharger control (jammed / seized), consult the interpretation of command
AC004Turbocharging solenoid valve,
– Check the engine compressions (cylinder compression balance with the Compression test function on
the CLIP tool).
– Check that the exhaust pipe is not blocked.
NO
YES
AFTER REPAIRCarry out a road test followed by a complete check with the diagnostic tool.
EDC16_V44_ALP4 / EDC16_V48_ALP4 / EDC16_V4C_ALP4
EDC16 INJECTION
Program No.: C1
Vdiag No: 44, 48 and 4C