torque RENAULT TWINGO RS 2009 2.G Electrical Equipment - Petrol Injection Workshop Manual

17B-12V7 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
ET086: Camshaft dephaser control
FAULT: this defect mode covers all faults that affect the measurement of the dephaser position.
The dephaser is controlled at the lower stop and the camshaft angle measurement is forced to 0.
Tooth signal fault.
Tooth/camshaft signal consistency fault finding procedure.
This type covers all faults affecting the camshaft dephaser (pulley and solenoid valve)
●Electrical fault finding on the solenoid valve.
●The camshaft dephaser is controlled at the lower stop.
FAULT: this defect mode covers all faults that affect the dephaser (pulley and solenoid valve).
The dephaser is set to the low stop.
Electrical fault finding on the solenoid valve.
Dephaser position fault finding procedure.
This type groups together all faults affecting the measuring of the camshaft dephaser position.
●tooth signal fault
●tooth/camshaft signal consistency fault finding procedure
The VVT is controlled at the lower stop and the camshaft angle measurement is forced to the requested setpoint.
A first program called Memo phasing is applied to phase the engine management on starting according to the data
recorded at the last setting. It is therefore essential to wait until the end of the "powerlatch" phase (computer self-
supply phase enabling data to be saved which lasts for approximately 30 seconds) before starting any operations.
Then, a second program confirms the first decision. It is based on torque analysis.
Air supply
The idle speed regulator performs all of the calculations required for physical control of the idle speed actuator: the
motorised throttle. The functional component of the regulator is adaptive (variation programming and ageing).
If the idle speed regulation conditions are met, the status ET054 Idle speed regulation is "Active", and the idle
speed regulator continually positions the motorised throttle to maintain the engine speed at its idle reference value.
The motorised throttle opening ratio necessary to comply with the speed setpoint is then given by parameter
PR091 Idle speed regulation theoretical OCR.
The PR090 Idle speed regulation programming value is a stored parameter designed to "program" engine
variations and engine wear and tear for the idle speed regulator. The programming is carried out only when the
engine is idle and warm, and no electrical consumer (air conditioning, fan assembly, power assisted steering) is
operating. Therefore it adjusts slowly.

17B-13V7 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
Idle speed
The idle speed setpoint is dependent on:
–the coolant temperature,
–the emission control programs,
–air conditioning requirements,
–the position of the gear lever,
–any power-assisted steering operation,
–the passenger compartment heating resistors,
–the oil temperature (engine protection),
–and lastly, the electric power balance (engine speed is increased by a maximum of 160 rpm if the battery voltage
remains below 12.7 V).
Ignition
Advance is calculated for each cylinder, and is limited between - 23˚ to + 72˚, and includes possible corrections due
to pinking.
Anti-pinking correction is the maximum advance value taken from the advance of one of the cylinders. If none of the
cylinders is pinking, this correction is zero.
Richness
For the catalytic converter to operate correctly, adjust around richness 1.
The richness regulation controlled by the upstream sensor which ensures a richness of around 1.
The upstream sensor supplies a voltage according to the image of the average engine richness: the voltage supplied
to the computer represents a Rich-Lean signal.
For the upstream sensor to be operational very rapidly, it is heated. The heating works only when the engine is
running. It is deactivated at speeds above 84 mph (140 km/h) or when the engine is under load.
The downstream sensor is also heated. The command does not activate immediately after starting the engine. It is
activated when the engine is running and has reached its operating temperature. The downstream heating sensor is
deactivated at speeds above 84 mph (140 km/h) or when the engine is under load.
Torque management
The torque structure is the system for managing engine torque. It is required for certain functions such as the
electronic stability program (ESP), automatic transmission (BVA) or sequential gearbox (BVR).
Each computer (ESP, sequential gearbox, automatic transmission) sends a request for torque via the multiplex
network to the injection computer. This intervenes between the torque requests received and the driver's requests
(made via the pedal or the cruise control/speed limiter function). The result of this intervention is the torque setpoint
to be applied. Using the torque setpoint, the structure calculates the throttle position setpoint, the ignition advance
and if the turbocharging function is present, the turbocharging solenoid valve setpoint.

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-25V7 MR-413-X44-17B000$060.mif
PETROL INJECTION
Fault finding – Features17B
SIM 32 Injection
Program no.: D3
Vdiag No.: 44, 4C, 50
and 54
Richness
For the catalytic converter to operate correctly, adjust around richness 1.
The richness regulation controlled by the upstream sensor which ensures a richness of around 1.
The upstream sensor supplies a voltage according to the image of the average engine richness: the voltage supplied
to the computer represents a Rich-Lean signal.
For the upstream sensor to be operational very rapidly, it is heated. The heating works only when the engine is
running. It is deactivated at speeds above 84 mph (140 km/h) or when the engine is under load.
The downstream sensor is also heated. The command does not activate immediately after starting the engine. It is
activated when the engine is running and has reached its operating temperature. The downstream heating sensor is
deactivated at speeds above 84 mph (140 km/h) or when the engine is under load.
Torque management
The torque structure is the system for managing engine torque. The torque structure is required for certain functions
such as the electronic stability program (ESP) or sequential gearbox (BVR).
Each computer (ESP, BVR) sends a request for torque via the multiplex network to the injection computer. This
intervenes between the torque requests received and the driver's requests (made via the pedal or the cruise control/
speed limiter function). The result of this intervention is the torque setpoint to be applied. Using the torque reference
value, the structure calculates the throttle position reference value and the ignition advance and if the turbocharging
function is present, calculates the turbocharging solenoid valve reference value.
Engine coolant temperature management
Engine cooling is performed by one or two fan assemblies (depending on the vehicle equipment). The injection
computer requests the UCH to actuate them via the multiplex network.
To provide cooling when the engine is running, activation of fan assembly 1 is requested if the coolant temperature
exceeds 99˚C and is deactivated when the temperature drops below 96˚C.
Fan unit 2 starts when the coolant temperature exceeds 102˚C and stops when it falls below 99˚C.
With the engine off, only GMV1 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 the engine temperature exceeds the warning threshold of 118˚C, the injection computer directly commands the
coolant temperature warning light to illuminate 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 handles cooling requirements for the air conditioning and
sequential gearbox functions.

17B-26V7 MR-413-X44-17B000$060.mif
PETROL INJECTION
Fault finding – Features17B
SIM 32 Injection
Program no.: D3
Vdiag No.: 44, 4C, 50
and 54
Air conditioning function
The SIM32 computer manages a "Cold Loop" type air conditioning system:
–request for air conditioning by logical link,
–acquisition of pressure in the air conditioning circuit,
–vehicle speed
–air conditioning compressor control,
–fan unit control for the requirements of this function.
The injection computer reconstitutes the power absorbed by the air conditioning compressor and fast idle speed
requests by using the pressure acquired in the air conditioning circuit.
These signals are necessary for adapting the engine management (idling speed regulation, air flow correction, etc.),
for several reasons:
–air conditioning compressor efficiency,
–more engine ruggedness due to torque hesitation caused by the compressor clutching and declutching,
–helping the alternator.
Fan unit 1 and/or 2 requests are reconstituted according to the pressure in the air conditioning circuit and the vehicle
speed. In summary, there are more fan unit requests when the speed is low and the pressure is high.
OCS - Customised Oil Change Interval (does not concern Vdiag 44 and 4C).
This program takes into account the driving style of the user to warn him of the need for an oil service. It counts the
number of revs per minute since the last oil service, corrected by a factor dependent on the oil temperature. When
this number of revs per minute exceeds a certain threshold, the customer is alerted by a message on the instrument
panel informing him that an oil service is required.
After the oil service, the user must reset the oil service interval on the instrument panel.
To find out if the engine concerned uses this programming, consult ET840 Customised Oil Change Interval.
OBD
The OBD programs are as follows:
–catalytic converter fault finding,
–upstream sensor operational fault finding,
–misfire fault finding,
–fuel supply system fault finding.
The misfiring and fuel supply system fault finding is performed continuously. The operational fault finding for the
upstream sensor and the catalytic converter can be only be carried out once per journey, and can never take place
at the same time.

17B-32V7 MR-413-X44-17B000$080.mif
17B
SIM 32 Injection
Program no.: D3
Vdiag No.: 44, 4C, 50
and 54
Defect modes
Motorised throttle valve
In defect mode, the motorised throttle valve can assume six different statuses.
ET564 Defect mode type 1
This type groups together the faults that prevent the throttle from being controlled.
It causes the throttle control to be stopped: the throttle is in its safe position. By depressing the pedal, it is possible
to modulate the torque by cylinder cut-off and advance in order to keep the vehicle running.
The ESP, cruise control/speed limiter and automatic/sequential gearbox systems change to "defect mode". This
defect mode is always accompanied by the Type 2 defect mode.
ET565 Defect mode type 2
This type groups together the faults preventing the system from controlling the air flow modulation.
The associated defect mode limits engine speed by cutting off the injection (limiting engine speed to 2400 rpm at idle
speed and to 3500 rpm in other gears).
ET566 Defect mode type 3
This type groups together faults allowing you to deduce that the system has lost the accelerator pedal signal, but still
controls the air flow modulation (motorised throttle servo operational). Defect mode is associated with a constant
pedal setpoint for each gear ratio. The vehicle speed can vary by changing gear.
Suggested speeds on a flat road:
–12 mph (20 km/h) max in 1 - st,
–21 mph (35 km/h) max in 2 - nd,
–27 mph (45 km/h) max in 3 - rd,
–39 mph (65 km/h) max in 4 - th,
–below 54 mph (90 km/h) in 5 - th and 6 - th.
ET567 Defect mode type 4
This type covers faults that affect the motorised throttle valve monitoring system, the pedal and the turbocharging
circuit (for D4FT 780) or for faults for which there is a viable safety operating mode for the system.
The associated defect mode is a limitation of the throttle opening according to the engine speed. This results in the
speed being limited to below 66 mph (110 km/h) in 5 - th and 6 - th gear and giving the impression of a "soft"
accelerator pedal.Note:
This defect mode is an effect which occurs due to a fault, but does not necessarily originate from the throttle valve
itself.
PETROL INJECTION
Fault finding – Defect modes

17B-33V7 MR-413-X44-17B000$080.mif
PETROL INJECTION
Fault finding – Defect modes17B
SIM 32 Injection
Program no.: D3
Vdiag No.: 44, 4C, 50
and 54
ET568 Defect mode type 5
This type covers faults that affect the atmospheric pressure, the turbo pressure, monitoring of the torque structure
and the turbocharging system (for D4FT 780).
Its effect is to go into pedal feedback mode instead of the permanent torque structure. The ESP and cruise control/
speed limiter systems are deactivated. The sequential gearbox (BVR) enters safe mode. The engine management
no longer accepts requests from the gearbox, and sends torque values by default to the multiplex network.
ET569 Defect mode type 6
This type covers faults affecting control of the wastegate on turbocharged vehicles (for D4FT 780).
Defect mode enables the engine to operate as a naturally aspirated engine. The wastegate is no longer controlled
and opens freely. The vehicle operates without turbocharging: with the loss of the turbocharger effects (brisk engine
performance, acceleration, take-up, etc.); operation as a naturally aspirated engine.
Entry into defect modes type 1 to 5 always leads to compulsory application of type 6 defect mode on turbocharged
versions*.