fuel consumption RENAULT TWINGO 2009 2.G Electrical Equipment - Petrol Injection Workshop Manual

17B-14V7 MR-413-X44-17B000$030.mif
PETROL INJECTION
Fault finding – System operation17B
SIM 32 Injection
Program no.: D3
Vdiag No.: 44, 4C, 50
and 54
Engine coolant temperature management
1. Conventional type thermostat
Engine cooling is performed by one or two fan assemblies (depending on the vehicle equipment). The injection
computer requests the UPC to actuate them via the multiplex network.
To ensure cooling, with the engine running, fan unit 1 is activated when the coolant temperature exceeds 99˚C and
stops when it drops below 96˚C.
Fan assembly 2 starts when the coolant temperature exceeds 102˚C and stops when it drops below 99˚C.
With the engine off, only fan assembly 1 may be activated to provide the anti-percolation function (if engine is
stopped when very hot). The anti-percolation function is active with the ignition off for a determined period. During
this time, fan assembly 1 is activated if the coolant temperature exceeds 100˚C and is deactivated when the
temperature drops below 95˚C.
If ET672: Engine coolant temperature management has a fault, then the temperature is regulated at 90˚C.
If a fault on the coolant temperature sensor circuit is detected, fan assembly 1 is activated and remains on all the
time.
If the engine coolant temperature exceeds the warning threshold of 118˚C, the injection computer directly
commands the coolant temperature warning light to come on or requests this action from the instrument panel
computer via the multiplex network, until the coolant temperature drops back below 115˚C.
As well as managing the engine, the injection computer centralises cooling requests for the air conditioning,
automatic transmission and sequential gearbox functions.
2. Controlled type thermostat
D4F 764 engines (with a camshaft dephaser solenoid valve) are fitted with a controlled coolant thermostat that
manages the engine at much higher coolant temperatures in order to reduce fuel consumption.
Description of operation
A conventional thermostat fitted with a heating resistor inside the wax core is used. The resistor is controlled by the
engine management computer by opening cycle ratio*.
In nominal operation, high coolant temperatures are managed in the engine in order to:
–reduce friction,
–reduce fuel consumption.
Nevertheless, defect operation mode is used to overcome faults linked to:
–reliability: at high engine speeds and high loads the engine temperature must be below 100˚C,
–performance: a high temperature increases chattering and reduces torque.
OCR*: Opening Cyclic Ratio.

17B-15V7 MR-413-X44-17B000$030.mif
PETROL INJECTION
Fault finding – System operation17B
SIM 32 Injection
Program no.: D3
Vdiag No.: 44, 4C, 50
and 54
a. Nominal operation: two operating modes.
High temperature (low and medium load mode):
When the thermostat is not controlled, it opens at a temperature of around 108˚C (compared to 89˚C for a
conventional thermostat). This allows fuel consumption to be reduced at low engine loads due to an increase in the
engine operating temperature (as there is less friction).
Low temperature (high load mode):
When the engine is put under greater stress (high loads, high engine speeds), the computer supplies the resistor
(the thermostat is controlled) to obtain operating temperatures below 108˚C (typically between 75˚C and 90˚C).
When the thermostat is opening as expected, comfort and a suitable engine temperature are obtained.
Too avoid too many transitions, switching from one mode to another is subject to time delays (a few seconds to
switch from high temperature
→ low temperature mode and several minutes to switch from low temperature → high
temperature mode).
b. Defect operation: forcing of low temperature mode and/or limitation of engine torque.
Low temperature management is activated.
Low temperature defect mode is used when one of the following faults is present and stored. Defect mode is reset to
0 using the On/Off key. Note:
The engine management computer automatically controls the thermostat in certain conditions, with the
aim of protecting the engine:
–External temperature greater than approximately 30˚C,
–Recognition of accelerator pedal being fully depressed.
If there is a short circuit to earth or an open circuit on the thermostat (for example: a connector
disconnected, DF893 Controlled coolant thermostat circuit in CO: Open circuit), engine performance is
limited to protect the engine.
IMPORTANT:
–It is essential to follow the new procedure for bleeding the cooling circuit (see MR 392 and 385,
Mechanical systems, CLIO III and MODUS, 19A Cooling, Cooling circuit: Bleeding), to prevent major
overheating of the catalytic converter. This new procedure is applicable to D4F engines with
SIEMENS injection.
–Do not inverse the connections of the temperature sensor and the thermostat control when
dismantling or carrying out electrical tests (foolproofing by colour of connections).

17B-16V7 MR-413-X44-17B000$030.mif
PETROL INJECTION
Fault finding – System operation17B
SIM 32 Injection
Program no.: D3
Vdiag No.: 44, 4C, 50
and 54
–DF089 Inlet manifold pressure sensor fault 1.DEF: Signal inconsistency.
Or 2. DEF: Open circuit or short circuit.
Or 3. DEF: Non-compliance with emission control standards.
–DF091 Vehicle speed signal in 1.DEF: No multiplex signals or invalid values.
Or 2. DEF: Non-compliance with emission control standards.
–DF001 Coolant temperature sensor circuit in 1.DEF: Signal inconsistency.
Or 2. DEF: Open circuit or short circuit.
Or 3. DEF: Non-compliance with emission control standards.
–DF002 Air temperature circuit in 1. DEF: Open circuit or short circuit.
Or 2. DEF: Non-compliance with emission control standards.
–DF330 Pinking sensor circuit in 1.DEF: Open circuit or short circuit.
Or 2. DEF: Non-compliance with emission control standards.
–DF893 Controlled coolant thermostat circuit in CO: Open circuit.
Or CC.0: Short circuit to earth.
Or CC.1: Short circuit to + 12 volts.
Or 1. DEF: Non-compliance with emission control standards.
Engine torque limitation is activated.
If the fault is directly linked to the controlled thermostat (DF893 Controlled coolant thermostat circuit), the
thermostat is no longer controlled. It operates continuously, either in low temperature mode (instance of short circuit to
earth) or in high temperature mode (instance of open circuit or short circuit to the battery). The engine torque is limited
to limit heating and also to protect the engine by preventing overheating.
c. Functions affected by the presence of a controlled thermostat:
–Coolant temperature: 108˚C nominal, between 70˚C and 90˚C in defect mode or on loaded points.
–Coolant temperature fault finding: the fault finding setting for coolant temperature consistency has been adapted.
–Consumption: The function improves fuel consumption. Consequence: a fault with the function may lead to
inefficient consumption.
–Bleeding the circuit: A new procedure adapted to this innovation is described in MR 392 and 385, Mechanical
systems, CLIO III and MODUS, 19A Cooling, Cooling circuit: Bleeding.
–Coolant temperature display and illumination of the warning light on the instrument panel: During nominal
operation there is no impact as the temperature reference value is taken into account as well as the warning light
illumination thresholds. In the event of malfunction, see the summary table below.
–Fan unit and air conditioning: the fan unit activation threshold and the high temperature air conditioning
deactivation threshold are adapted in accordance with the temperature setpoint.
–Fault finding of controlled thermostat: Electrical fault finding is used. No operational fault finding:
A mechanical fault (such as jamming) will not be detected by the system.
–Performance: In the event of a fault, there is the option to switch the engine to reduced performance mode (see
Description of operation: Operation in defect mode). Note:
If a fault on the coolant temperature sensor is detected, fan assembly 1 is requested to operate permanently,
regardless of the management mode of the engine coolant temperature.

17B-17V7 MR-413-X44-17B000$030.mif
PETROL INJECTION
Fault finding – System operation17B
SIM 32 Injection
Program no.: D3
Vdiag No.: 44, 4C, 50
and 54
Summary table of malfunction modes:
Types SpecialEffects on the
engineCustomer complaints
Electrical
faults on
resistor or
wiringThermostat
faults–Open short
circuit
–Short circuit to
+ 12 V0%Coolant temperature
≈ 110˚C, limited
performance, low
temperature
reference value.Overheating warning light
comes on at each first
opening, high temperature on
instrument panel, fan
assembly 1 activated.
–Short circuit
100%Coolant temperature
≈ 90˚C, limited
performance, low
temperature
reference value.Normal operation for
customer but performance
limited by 10 to 20%.
Sensor
faults–All
Low
temperature
modeForced low
temperature mode,
with no limited
performance.No visible effect, impact on
fuel consumption with
permanent low
temperature operation.
Thermostat
faults
detectedNominalNo change of mode
when requested.Overheating warning light
lighting on first opening,
display of an additional
square if the mode is
changed.
Non-
electrical
faultsThermostat
faults
detected–Thermostat
stuck in closed
positionAll modesNo cooling, engine
overheating, engine
damage.Instrument panel display,
overheating warning, torque
reduction.
–Thermostat
stuck in open
position
All modesSlow increase in
temperature.Overconsumption of petrol
when cold, unsuitable
passenger compartment
temperature, possible
performance reduction when
cold.

17B-84V7 MR-413-X44-17B000$131.mif
PETROL INJECTION
Fault finding – Interpretation of faults17B
SIM 32 Injection
Program no.: D3
Vdiag No: 4C, 50
DF080
PRESENT
OR
STOREDCAMSHAFT DEPHASER CIRCUIT
CO: Open circuit
CC.0: Short circuit to earth
CC.1: Short circuit to + 12 V
1.DEF: Values outside the limits
2.DEF: Programming not carried out or incorrect
3.DEF: dephaser mechanically jammed.
4.DEF: Servo-control dynamics
5.DEF: Dephaser operation outside the permitted range of values
6.DEF: Non-compliance with emission control standards
NOTESPriorities when dealing with a number of faults:
–DF119 Camshaft sensor signal,
–DF084 Actuator relay control circuit,
–DF046 Battery voltage if they are present or stored.
Conditions for applying the fault finding procedure to stored faults:
The fault is declared present with the engine running.
Special notes:
Engine operation without camshaft dephaser: increase in fuel consumption.
See Technical Note 6506A, Injection fault finding, Camshaft dephaser.
For electrical faults, see ALP4.
For operating faults, see ALP5.
If the fault is still present, contact the Techline.
SIM32_V4C_DF080/SIM32_V50_DF080
AFTER REPAIRFollow the instructions to confirm repair:
- If the fault is present, continue to deal with the fault.
- If the fault is stored, ignore it.
Deal with any other faults.
Clear the stored faults.

17B-97V7 MR-413-X44-17B000$132.mif
PETROL INJECTION
Fault finding – Interpretation of faults17B
SIM 32 Injection
Program no.: D3
Vdiag No.: 44, 4C, 50
and 54
DF084
PRESENT
OR
STOREDACTUATOR RELAY CONTROL CIRCUITCO: Open circuit
CC.0: Short circuit to earth
CC.1: Short circuit to + 12 V
1.DEF: Abnormal voltage
2.DEF: EOBD
NOTESConditions for applying the fault finding procedure to stored faults:
The fault is declared present with the engine running.
Special notes:
This relay supplies the following actuators: the injectors, the throttle valve control, the
oxygen sensor heaters, the fuel vapour absorber bleed solenoid valve and connection
3FB of the injection computer.
CO/CC.1: No actuator supply: same effect as running out of fuel. The vehicle stalls and
will not start again.
CC.0: The actuators are supplied constantly: high electrical consumption when
stationary.
Intermittent CO: Intermittent relay cut-off: bucking when driving.
Use the Wiring Diagrams Technical Note for NEW TWINGO, E33, CLIO III, or
MODUS.
Check the condition of the engine management computer connector (component code 120).
If the connector is faulty and there is a repair method (see Technical Note 6015A, Repairing electrical wiring,
Wiring: Precautions for repair), repair the connector, otherwise replace the wiring.
For NEW TWINGO or E33:
Check the condition of the injection locking relay connector (component code 238).
If the 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.
Use the universal bornier to check the insulation and continuity of the following connections:
●3AA between components 238 and 120,
●3FB between components 238 and 193, 194, 195, 196, 1076, 242, 887, 371.
If the connection or connections are faulty and there is a repair procedure (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace it.
SIM32_V44_DF084/SIM32_V4C_DF084/SIM32_V50_DF084/SIM32_V54_DF084
AFTER REPAIRFollow the instructions to confirm repair:
- If the fault is present, continue to deal with the fault.
- If the fault is stored, ignore it.
Deal with any other faults.
Clear the stored faults.

17B-117V7 MR-413-X44-17B000$132.mif
PETROL INJECTION
Fault finding – Interpretation of faults17B
SIM 32 Injection
Program no.: D3
Vdiag No.: 44, 4C
and 54
DF119
PRESENT
OR
STOREDCAMSHAFT SENSOR SIGNAL1.DEF: Camshaft tooth event
2.DEF: Tooth lost
3.DEF: Measurement of the offset outside permitted range of values
4.DEF: EOBD
5.DEF: Programming the stops
6.DEF: Programming the initial stops
NOTESPriorities when dealing with a number of faults:
Deal first with fault DF084 Actuator relay control circuit or DF046 Battery voltage
if they are present or stored.
Conditions for applying the fault finding procedure to stored faults:
The fault is considered present when the engine is running.
Special notes:
Engine operation without camshaft dephaser: deterioration in fuel consumption
performance.
Use Wiring Diagram Technical Note for CLIO III or MODUS.
Check the condition of the camshaft position sensor connector and its wiring (component code 1265).
If the connector is faulty and there is a repair method (see Technical Note 6015A, Repairing electrical wiring,
Wiring: Precautions for repair), repair the connector, otherwise replace the wiring.
If the fault is still present, check, with the ignition on, for +12 V on connection 3FB of the camshaft sensor,
component code 1265.
If the connection is faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
SIM32_V44_DF119/SIM32_V4C_DF119/SIM32_V54_DF119
AFTER REPAIRFollow the instructions to confirm repair:
- If the fault is present, continue to deal with the fault.
- If the fault is stored, ignore it.
Deal with any other faults.
Clear the stored faults.

17B-263V7 MR-413-X44-17B000$160.mif
17B
SIM 32 Injection
Program no.: D3
Vdiag No.: 44, 4C, 50
and 54
* OCR: Opening cyclic ratio
* EV: Solenoid valve
* mot: motorised
* app.: applying
* AAC: Camshaft
Tool ParameterDiagnostic tool title
PR014Idling speed correction
PR015Engine torque
PR018Estimated air flow
PR030Accelerator pedal position
PR035Atmospheric pressure
PR037Refrigerant pressure
PR041Turbocharger pressure (Vdiag 54 only)
PR055Engine speed
PR059Inlet air temperature
PR064Coolant temperature
PR071Computer feed voltage
PR089Vehicle speed
PR090Idle speed regulation programming value
PR091OCR* Theoretical idle speed regulation
PR094AAC* dephaser OCR* setpoint (Vdiag 4C only)
PR095Anti-pinking correction
PR096Mot.* throttle upper stop programmed value.
PR097Mot.* throttle lower stop programmed value.
PR098Upstream oxygen sensor voltage
PR099Downstream oxygen sensor voltage
PR101Duration of injection
PR102Canister bleed solenoid valve OCR*
PR103Instantaneous fuel consumption
PR104Turbocharging EV* OCR* (Vdiag 54 only)
PR105Mileometer OBD fault warning light lit
PR106Mileometer fault warning light lit
PR111Motorised throttle position corrected value.
PR113Lower throttle stop after app.* offset
PR116Motorised throttle corrected position setpoint
PR118Measured throttle position gang 1
PR119Measured throttle position gang 2
PETROL INJECTION
Fault finding – Parameter summary table

17B-290V7 MR-413-X44-17B000$171.mif
PETROL INJECTION
Fault finding – Interpretation of parameters17B
SIM 32 Injection
Program no.: D3
Vdiag No.: 44, 4C, 50
and 54
PR103CURRENT FUEL CONSUMPTION
PARAMETER
DEFINITIONThis parameter indicates the current fuel consumption in l/h.
NOTESSpecial notes:
Only perform these tests if the parameters do not correspond with the system operation
programming.
Conformity check with engine stopped and ignition on, or engine running, and engine coolant
temperature > 80˚C
This value changes according to the engine load.
SIM32_V44_PR103/SIM32_V4C_PR103/SIM32_V50_PR103/SIM32_V54_PR103
AFTER REPAIRCarry out a road test followed by a check with the diagnostic tool.