2009 RENAULT TWINGO RS coolant

17B-22V7 MR-413-X44-17B000$060.mif
17B
SIM 32 Injection
Program no.: D3
Vdiag No.: 44, 4C, 50
and 54
SYSTEM OPERATION
Composition
The injection system consists of the:
–accelerator potentiometer,
–TDC sensor,
–air temperature sensor,
–inlet manifold pressure sensor,
–+ turbocharging pressure sensor,
–coolant temperature sensor,
–refrigerant pressure sensor,
–upstream oxygen sensor,
–downstream oxygen sensor,
–cruise control switch (fitted according to the vehicle equipment level),
–cruise control on/off switch (fitted according to the vehicle equipment level),
–brake light switch,
–clutch pedal switch,
–fuel vapour absorber,
–injection computer,
–motorised throttle valve,
–four injectors,
–ignition coil,
–pinking sensor.
Additional components on D4FT 780:
–Turbocharging
–Oil vapour rebreathing circuit de-icing system
–OCS - Customised oil change interval
Computer
SIEMENS type "SIM32" 112-track computer controlling the injection and the ignition. Multipoint injection in
sequential mode.
Connections with the other computers, known as "Intersystem connections":
–ESP (fitted depending on vehicle equipment level).
–Passenger Compartment Control Unit (UCH).
–Gearbox Computer: BVR sequential gearbox (if fitted to the vehicle).
–Instrument panel.
–Airbag.
–ABS (if fitted to the vehicle).
–Rev counter instrument.
–Air conditioning.
PETROL INJECTION
Fault finding – Features

17B-23V7 MR-413-X44-17B000$060.mif
PETROL INJECTION
Fault finding – Features17B
SIM 32 Injection
Program no.: D3
Vdiag No.: 44, 4C, 50
and 54
Engine immobiliser
The SIM 32 computer manages an engine immobiliser program:
–The Verlog 4 type immobiliser function is managed by the UCH computer and the engine management computer.
Before any customer request, the engine management computer and UCH exchange authentication frames via the
multiplex network to determine whether or not to start the engine.
After more than five consecutive failed authentication attempts, the engine management computer goes into
protection (antiscanning) mode and no longer tries to authenticate the UCH. The engine management computer only
exits this mode if the following sequence of operations is respected:
–the ignition is left on for at least 60 seconds,
–the signal is cut off,
–the injection computer self-feed deactivates when it should (the time varies according to engine coolant
temperature.
Following this sequence of operations, a single authentication attempt is authorised. If this fails again, repeat the
sequence of operations described above.
If the engine management computer still fails to unlock, contact the Techline.
Impact detected
If an impact has been stored by the injection computer (ET077 Impact detected), switch off the ignition for
10 seconds, then switch it back on so that the engine can be started. Then clear the faults using command RZ001
Fault memory.
Fuel supply
Fuel is supplied by the fuel pump. It is controlled each time the ignition is switched on, for 1 second, to provide a
certain pressure level in the circuit, and thereby achieve correct engine starting, particularly if the vehicle has not
been used for a long time. When the engine is running, the fuel pump relay is always controlled.
Injection
The injectors are controlled according to several modes. In particular, the engine is started in semi-full group mode
(injectors 1 and 4, then injectors 2 and 3 simultaneously), to ensure a correct start whether or not it is correctly
phased, then it enters sequential mode.
It can sometimes, though rarely, happen that the engine starts when incorrectly phased.
Then, after it has changed to sequential injection mode and as long as the cylinder 1 recognition program has not
taken place, the injectors are offset by two cylinders: injection occurs in the order 4-2-1-3 instead of the expected
order 1-3-4-2.
Injection timing is continuously calculated. It can be zero in the event of cut-off whilst decelerating or overrevving for
example.

17B-24V7 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 supply
The idle speed regulator performs all of the calculations that allow the idle speed actuator, the motorised throttle, to
be controlled physically. 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.
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),
–the electric power balance (engine speed is increased by 160 rpm maximum 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.

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-31V7 MR-413-X44-17B000$070.mif
PETROL INJECTION
Fault finding – Role of components17B
SIM 32 Injection
Program no.: D3
Vdiag No.: 44, 4C, 50
and 54
TDC sensor:
The angular position is measured using a magneto-inductive sensor triggered by the machined teeth on the engine
flywheel. This sensor gives the engine speed as well as the position of the crankshaft for injection.
Refrigerant pressure sensor:
Its role is to measure the refrigerant pressure in the air conditioning circuit.
Engine coolant temperature sensor:
The engine coolant temperature sensor informs the computer of the engine coolant temperature.
Air temperature sensor:
The air temperature sensor is fitted inside the inlet manifold and informs the computer of the temperature of the air
taken in by the engine.
Catalytic converter:
The role of the catalytic converter is to convert pollutant gases into harmless gases.
Cruise control/speed limiter on/off switch:
This switch is used to turn the cruise control/speed limiter on or off.
Fan unit relay:
This relay actuates the motor-driven fan assemblies when a temperature threshold has been exceeded.
Accelerator potentiometer:
The accelerator potentiometer informs the computer of the position of the accelerator pedal (engine load).
Clutch pedal switch:
The clutch pedal switch informs the computer of the clutch pedal status.
Inlet air temperature sensor:
Its role is to measure the air temperature in the inlet circuit.
Pinking sensor:
Its role is to check for pinking in the combustion chamber.
Oil level sensor:
This sensor measures the level of oil in the engine and sends this information to the computer.

17B-35V7 MR-413-X44-17B000$090.mif
17B
SIM 32 Injection
Program no.: D3
Vdiag No.: 44, 4C, 50
and 54
1. COMPUTER REPLACEMENT OR REPROGRAMMING OPERATIONS
Computer replacement or reprogramming for engines with the OCS (customised oil change interval)
function.
For Vdiag 44 and 4C, commands SC001 and SC003 are not accessible.
The system can be programmed via the diagnostic socket using the RENAULT CLIP diagnostic tool (refer to
Technical Note 3585A, COMPUTER PROGRAMMING AND REPROGRAMMING PROCEDURE or follow the
instructions given by the diagnostic tool). Only in Vdiag 54 and certain engines in Vdiag 50:
For Vdiag 50, the procedure below should be followed only if ET840 Customised Oil Change Interval is ACTIVE.
Certain variables linked to the O.C.S and the details of the last four oil services are saved by the computer.
However, all data saved is cleared during a reprogramming operation. When replacing or reprogramming the
computer, it is necessary to save the data from the old computer so it can be written to the new computer
(or reprogrammed). To do this before changing (or reprogramming) the computer, it is necessary to run the request
SC003 Save computer data, and after it has been changed (or reprogrammed), it is necessary to run the request
SC001 Write saved data.
For Vdiag 50, if ET840 Customised Oil Change Interval is INACTIVE, commands SC001 and SC003 should
not be used.
Operations to check before reprogramming the injection computer:
Before reprogramming the injection computer, move the main Cruise control/Speed limiter 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:
Ignition switched on and main switch in rest position (the computer detects rest position at that moment).
Switch in Cruise control position to activate the Cruise control function.
Switch in Speed limiter position to activate the Speed limiter function.
IMPORTANT:
–Switch on the diagnostic tool (mains or cigarette lighter supply).
–Connect a battery charger.
–Switch off all electrical consumers (lights, interior lighting, air conditioning, radio, etc.).
–Wait for the engine to cool (engine coolant temperature below 60˚C and air temperature below 50˚C).
PETROL INJECTION
Fault finding – Replacement of components

17B-38V7 MR-413-X44-17B000$100.mif
PETROL INJECTION
Fault finding – Configurations17B
SIM 32 Injection
Program no.: D3
Vdiag No.: 44, 4C, 50
and 54
Configuration readingDescription
LC158
Air conditioning heating resistor management
With
None
LC008
(for CLIO III or MODUS only)Camshaft dephaser
With
None
LC162
(for CLIO III or MODUS only)Controlled coolant thermostat
With
None

17B-39V7 MR-413-X44-17B000$110.mif
17B
SIM 32 Injection
Program no.: D3
Vdiag No.: 44, 4C, 50
and 54
2. PROGRAMMING
Flywheel target programming
(To be carried out when replacing or removing the TDC sensor).
The coolant temperature must be over 35˚C.
–Carry out an initial deceleration with injection cut-off (feet off the brake, accelerator and clutch pedals) between
3500 and 3000 rpm, in 3rd gear for at least 5 seconds for manual gearboxes.
–Decelerate a second time with injection cut-off (feet off the brake, accelerator and clutch pedals) between 2400 and
2000 rpm, in 3rd gear for at least 5 seconds for manual gearboxes.
Check the programming with ET089 Programming flywheel target: Performed.
Programming the throttle end stops
After replacement of the computer or the motorised throttle valve, with the ignition on, wait 30 seconds so that the
computer can program the Upper and Lower limits and then switch off the ignition and wait 30 seconds for the end of
the "Power Latch", so that the computer can store the programmed limits. Check the programming with ET051
Programming throttle stops: Performed.
Programming the alcohol level (only for vehicles running on Ethanol or E85 fuel)
Fuel recognition is carried out by observing the drift of the richness controller.
This can only be performed if the mixture regulation is looped (ET300 Mixture regulation).
Programming procedure:
–start the engine,
–wait for the engine coolant temperature to reach 75˚C and then check using the parameter PR064 "Coolant
temperature",
–run the engine at 1500 rpm for a period of at least 5 minutes,
–check that the programming has been carried out using status ET671 Alcohol level programming and
parameter PR743 Estimated alcohol level in tank,
–the programming is saved when the ignition is switched off. Note:
After replacement of the throttle valve run the command RZ005 Programming to erase any recorded
programming.
Note:
When the injection computer has not recognised the fuel composition, operation is faulty.
PETROL INJECTION
Fault finding – Programming