2000 RENAULT SCENIC engine

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Cleanliness
13
13-6
Cleanliness
CLEANLINESS INSTRUCTIONS WHICH MUST BE FOLLOWED WHEN WORKING ON THE HIGH PRESSURE
DIRECT INJECTION SYSTEM
Risks relating to contamination
The system is very sensitive to contamination. The risks caused by the introduction of pollution are:
– damage to or destruction of the high pressure injection system,
– seizing of a component or a component which is not sealed.
All after-sales operations must be performed under very good cleanliness conditions. This means that no impurities
(particles a few microns in size) have penetrated into the system during removal or into the circuits via the fuel
unions.
The cleanliness principle must be applied from the filter to the injectors.
WHAT ARE THE POLLUTING ELEMENTS?
The elements which pollute are:
– metal or plastic splinters,
– paint,
– fibres:
!of cardboard,
!of brushes,
!of paper,
!of clothing,
!of cloths.
– foreign bodies such as hair,
– ambient air,
– etc.
WARNING: it is impossible to clean the engine using a high pressure washer at the risk of damaging connections.
Also the moisture may collect in the connectors and cause electrical connection problems.
INSTRUCTIONS TO BE FOLLOWED BEFORE
ANY WORK IS CARRIED OUT ON THE INJECTION SYSTEM
!Ensure that you have plugs for the unions to be opened (bag of plugs sold by the Parts Department).
Plugs are to be used once only. After use, they must be thrown away (once used they are soiled and cleaning is
not sufficient to make them reusable).
Unused plugs must be thrown away.
!Ensure that you have the resealable plastic bags for storing removed parts. There is less risk of parts stored in this
way being subjected to impurities. The bags can be used only once, and once used they must be thrown away.
!Ensure that lint-free cleaning wipes are available (cloths with SODICAM part numbers). The use of conventional
cloth or paper is prohibited. In fact, these create lint and may contaminate the system's fuel circuit. A lint-free
cloth should only be used once.

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Cleanliness
13
13-7
INSTRUCTIONS TO BE FOLLOWED BEFORE OPENING THE FUEL CIRCUIT
!For each operation, use new thinner (used thinner contains impurities). Pour it into a clean receptacle.
!For each operation, use a clean brush which is in good condition (the brush must not shed its bristles).
!Clean using the unions to be opened and the parts to be removed using thinner and tweezers.
!Blow compressed air over the cleaned parts (tools, set up the same way as the parts, connections and injection
system zone). Check that no bristles are left.
!Wash your hands before and during the operation if necessary.
!When using protective gloves, cover leather gloves with latex gloves (available from SODICAM).
INSTRUCTIONS TO BE FOLLOWED DURING THE OPERA
TION
!As soon as the circuit is open, all openings must be blanked to prevent pollution from penetrating the circuit. The
plugs to be used are available from the Parts Department. They must not be reused.
!Reseal the bag hermetically, even if it has to be reopened only a short time later. Ambient air carries pollution.
!All components of the injection system must, after having been blanked, be stored in a hermetically sealed plastic
bag.
!After opening the circuit, the use of a brush, thinner, bellows, sponge or normal cloth is strictly forbidden. In fact,
these elements are liable to cause the entry of impurities into the system.
!When replacing a component with a new one, do not remove it from its packaging until it is to be fitted to the vehicle.

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Cleanliness
13
13-8

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Location of components
13
13-9
Location of components
1
2
3
4
5
6
7
8
9
10
11
12
13
14Injection computer
Cylinder marking sensor
Solenoid injector
Rail pressure sensor
Flow meter with air temperature sensor
EGR valve
Turbocharger pressure sensor
Preheating unit
Turbocharging pressure regulator (solenoid)
Accelerator pedal potentiometer
Engine speed sensor and coolant temperature sensor
Fuel pressure regulator
Fuel temperature sensor (depending on version)
High pressure pump

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Location of components
13
13-10
16192R
1
2
3
4
5
6High pressure pump
Common injection rail
Injector
Pressure regulator
Pressure sensor
Water temperature sensor

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Location of components
13
13-11
16181R
7
8
9Cylinder marking sensor
Turbocharger
Priming catalytic converter
16155R2
11
12
13
14EGR solenoid valve
Turbo regulation solenoid
Turbocharger pressure sensor
Preheating unit
16869R3
15
16
17Injection computer
Fuel filter
Repriming fuel cock
16870R2

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Injection warning light
13
13-12
Injection warning light
Vehicles using the high pressure diesel system are fitted with two injection warning lights used during the preheating
phase and in case of an injection fault (or engine overheating).
WARNING LIGHT PRINCIPLE
!When ignition is switched on, the preheating light is lit during the preheating phase and then goes out (see section
13 "Pre-postheating control").
!When there is a fault on the injection system the "fault" warning light lights up. These faults are:
– internal computer fault,
– engine speed fault (the vehicle doesn't start),
– main relay or low pressure fault (the vehicle doesn't start),
– injector fault,
–TDC sensor coherence fault and camshaft sensor,
– rail pressure sensor fault,
– rail pressure regulator fault,
– accelerator potentiometer fault,
– engine immobiliser fault,
– computer supply voltage fault,
– engine overheating.
NOTE: the OBD warning light (symbolised by an engine), visible when the ignition is switched on, is never visible
when the engine is running.

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Immobiliser function
13
13-13
Immobiliser function
This vehicle is fitted with an engine immobiliser controlled by a random rolling code key recognition system.
REPLACING AN INJECTION COMPUTER
The injection computers are supplied without a code but they must all be programmed with one.
When the computer is replaced, the vehicle code must be programmed in and then a check must be made to ensure
that the immobiliser system is operational.
To do this, simply switch on the ignition for a few seconds without starting the engine then switch it of f. When the
ignition is off, the engine immobiliser function will be activated after approximately 10 seconds (red engine
immobiliser warning light flashes).
IMPORTANT:
With this engine immobiliser, the computer keeps its immobiliser code for life.
In addition, this system does not have a security code.
Consequently, it is forbidden to perform tests with computers borrowed from the stores or from another
vehicle which must then be returned.
It will no longer be possible to decode them.