1995 RENAULT MEGANE SCENIC fuel cap

DIESEL EQUIPMENT
Specifications
13
Vehicle GearboxEngine
Type SuffixBore
(mm)Stroke
(mm)Capacity
(cm
3)RatioCatalytic
converterDepollution
standard
BA0U JB3 F8Q 620 80 93 1 870 21.5/1 None EU93
BA0A JB3 F8Q 620 80 93 1 870 21.5/1 C25 EU96
ENGINE SPEED (rpm.)
Idle speed Maximum no loadMaximum with
load
SMOKE OPACITY
Homologation value Legal maximum
825 ± 25 5 200 ± 100 4 600 ± 100 1.24 m
-1 (40 %) 2 m -1 (55 %)
DESCRIPTION MAKE /TYPE SPECIAL NOTES
Injection pump
Pumps R598-2 and R598-3 differ
in that a coded fuel shut off
valve has been addedBOSCH
VE 4/8F 2300R598
VE 4/8F 2300R 598-1*
VE 4/8F 2300R 598-2
VE 4/8F 2300R 598-3*Rotary pump with:
- separate idle lever
- solenoid controlled load dependence (ALFB)
- post-heating and EGR cut-out microswitch
- air conditioning cut-out microswitch*
Pump timing obtained by 8mm
diameter TDC pin (Mot. 1079)Pump piston lift: 0.82 ± 0.04 mm
(the setting value is stamped on the load lever)
Injector holders
BOSCH KCA 17 S 42Tightening torque : 7 daN.m
Injectors BOSCH
DNOSD 302 Test: 130 bars
Maximum gap: 8 bars
Fuel filter
PURFLUXPriming pump
The filter is fitted with an electrical fuel heater
EGR solenoid valve Voltage: 12 volts
Resistance : 10 ± 5 Ω
Fuel pipes External diameter : 6 mm
Internal diameter : 2.5 mm
Length: 400 mm
Pre-heating unit
NAGARESWith pre-post-heating function and cold start
functions and fast idle solenoid
Heater plugs BOSCH Current: 15 A approximately after 8 seconds
heating
Tightening torque : 2 daN.m
+8
- 5
13-15

DIESEL EQUIPMENT
Pre-post-heating unit
13
DIAGRAM KEY
104Ignition switch
163Starter
171Air conditioning clutch
206Air conditioning trifunction pressure switch
247Instrument panel
251Bi-function coolant temperature switch
257Pre-heating unit
398EGR solenoid valve
412Fast idle solenoid valve (AC version)
597Engine fuse box
642AC / pre-heating separation diode
645Passenger compartment fuse box
680Pre-heating unit n° 1
681Pre-heating unit n° 2
682Pre-heating unit n° 3
683Pre-heating unit n° 4
711Diesel fuel pump
741Altimetric capsule
743Altimetric relay
777Power feed for fuse boxConnector (A)
+ Bat+ before ignition feed
Connector (B)
1Feed to heater plugs 1 and 3
2Feed to heater plugs 2 and 4
Connector (C)
A1 / S2Load dependence solenoid valve
control
A2 / PCLoad lever microswitch information
A3 / CTNCTN type sensor coolant temperature
information
B1/+APC+ after ignition feed
B2 / DEMStarter information
B3 / TemPre-heating warning light control (via
earth)
C1 / S1Not used
C2 / -Bat Earth
C3 / ClimFast idle solenoid valve control during
post-heating phase
92206-2R
IDENTIFICATION OF CONNECTORS
13-30

ANTIPOLLUTION
Fuel vapour recirculation
14
OPERATING PRINCIPLE
The fuel tank is connected to the outside through
the canister.
Fuel vapour is retained by the active carbon in the
canister.
So that the fuel vapour contained in the canister
does not evaporate into the atmosphere when
the fuel tank is opened, a valve isolates the canis-
ter from the fuel tank when the fuel filler cap is
removed.
The fuel vapour contained in the canister is elimi-
nated and burnt by the engine.
To do this, a pipe connects the canister and the in-
let manifold. A solenoid valve is located on this
pipe to control bleeding of the canister.
The operating principle for the solenoid valve is to
give a variable passage diameter (depending on
an RCO signal from the injection computer).
The variation in the selection of passage diameter
for the fuel vapour in the solenoid valve results
from the balance between a magnetic field crea-
ted by the feed to the coil and the force of a re-
turn spring ensuring the valve remains closed.
CONDITIONS FOR CANISTER BLEEDING
During richness regulation
Coolant temperature greater than:
- + 55°C (F3R engine),
- + 15°C (K7M engine),
- + 70°C (E7J engine).
Air temperature greater than:
- - 10°C (F3R engine),
- + 10°C (K7M engine),
- + 20°C (E7J engine).
No load position not recognised (if the throttle
position sensor is faulty, the non-recognition of
the no load condition is replaced by an engine
speed condition
engine speedR > 1500 rpm.).
Outside richness regulation
No load position not recognised.
Coolant temperature less than +15°C for
F3R and
K7M engines (no condition for E7J engine).
If the oxygen sensor is faulty, the canister is bled
when there is no no load.
The cyclical opening ratio for the canister bleed
solenoid valve may be seen using the XR25 and
#23. The solenoid valve is closed for #23 = 0.7 %
(minimum value) except for E7J engines (no #23).
14-4

ANTIPOLLUTION
Fuel vapour recirculation
14
CANISTER - FUEL TANK CONNECTION
The canister is connected to the fuel tank filler
neck by a quick release union.
99216R
In the filler neck, a separate circuit connects the
quick release union to the sealing valve.
99212R1
The sealing valve isolates the canister when the
fuel filler cap is removed.
When the fuel filler cap is in position, the valve is
open and the fuel vapour may be absorbed by the
canister.
14-7

ANTIPOLLUTION
Fuel vapour recirculation
14
CHECKING THE OPERATION OF THE CANISTER
BLEED VALVE
A malfunction in the system could cause the idle
speed to be unstable or the engine to stall.
Check the circuit conforms (see diagrams).
Take care to check that the pipe marked "CAN"
on the solenoid valve is connected to the canister.
Check the condition of the pipes up to the fuel
tank.
97393R4
1Inlet manifold
2Canister bleed solenoid valve
3Canister
4Fuel tankAt idle speed, check by connecting a pressure
gauge (- 3 ; +3 bars) (Mot. 1311-01) to the "CAN"
outlet on the solenoid valve, that there is no
vacuum (in the same manner, check the command
value read by the
XR25 using #23 remains at a
minimum X = 0.7 % for F3R and K7M engines). Is
there a vacuum ?
YESIgnition off, use a vacuum pump to apply a
vacuum of 500 mbars to the solenoid valve
at (C). The vacuum should not vary by more
than 10 mbars in 30 seconds.
Does the pressure vary?
YESThe solenoid valve is faulty, renew
it. Air must also be blown into the
pipe connecting the solenoid valve
to the canister to eliminate any
particles of active carbon.
NOThere is an electrical fault - check
the circuit.
NOUnder bleeding conditions (engine not at
idle speed, engine warm), there should be
an increase in the vacuum (at the same
time, the value for #23 on the XR25 should
increase forF3R and K7M engines).
The fuel tank breather pipe can also be checked.
After removing the filler cap, use a vacuum pump
to apply a vacuum to the pipe at (B). If a vacuum
can be applied to the pipe this shows that the
overfilling valve is correctly sealed.
As soon as the filler cap is replaced, however, the
vacuum should disappear quickly as the pipe is no
longer blocked and the internal degassing
chambers in the fuel tank are connected.
14-8

FUEL TANK
Filler neck
19
ROLE OF THE VALVES
A) Over-filling valve
When the fuel filler cap is removed, the valve
is closed, locking a volume of air in the brea-
ther chamber. This prevents fuel from ente-
ring this chamber.
When the filler cap is replaced, the valve
opens and the fuel tank breather is again
connected to the canister.
B) Excess - insufficient pressure safety valve
If the fuel vapour recirculation circuit is
blocked, this valve prevents the fuel tank from
excess pressure (the fuel tank would other-
wise inflate) or insufficient pressure (as fuel is
used, the fuel tank would be crushed).
C) Restriction valve
This valve prevents leaded fuel from entering
the fuel tank.
D) Valve preventing leaks if the vehicle is turned
over
If the vehicle is turned over, this valve pre-
vents the fuel tank from emptying, either
through the pipe to the canister or the brea-
ther pipe (Diesel).
The fuel tank has a sealed filler cap and a ventila-
tion circuit.
The filler neck for unleaded fuel has:
- an opening which is narrower and incompati-
ble with a leaded fuel pump nozzle (lead would
pollute the depollution system: the oxygen
sensor and catalytic converter),
- a valve blocking the filling opening (C) (to pre-
vent fuel vapour evaporating or fuel coming
out of the tank).
Refitting the fuel filler cap releases the over-filling
valve (A), allowing the tank to breathe through
the breather.
99212R
19-24

GENERAL
Engine and equipment
40
(1) If necessary, unleaded fuel with an octane rating of 91 may be used.
Vehicle
typeVersionEngine
Type Ratio InjectionCapacity
(cm
3)Idle speed
(rpm)Fuel type
KA0M
KA0V1.4 l E7J 9.5/1 Multipoint 1390Non-
adjustableUnleaded
95 or 98 (1)
KA0W
KA0D1.4 l
16 VK4J 10/1 Multipoint 1390Non-
adjustableUnleaded
95 or 98 (1)
KA04
KA0B1.6 l
16 VK4M 10/1 Multipoint 1598Non-
adjustableUnleaded
95 or 98 (1)
KA0J
VA0J1.9 l D F8Q 21.5/1 Indirect 1870 825±50 Diesel
KA05
VA05
KA0N
VA0N
KA01
VA011.9 l
DtiF9Q
Turbo18.3/1 Direct 1870850±50
Non-
adjustableDiesel
Vehicle Rim TyresTyre inflation pressure -
cold (bar) (1)
Front Rear
KA0M/KA0V
KA0W/KA0D5.5 J 14 175/70 R 14 2.2 2.0
KA04/KA0B6.0 J 15 185/60 R 15 2.2 2.0
KA0J/VA0J6.0 J 15 175/70 R 14 2.2 2.0
KA0N/VA0N
KA05/VA05
KA01/VA01
6.0 J 15 185/60 R 15 2.2 2.0
(1) Fully laden and motorway use.
Tightening torque for wheel nuts : 9 daN.m
Rim run-out: 1.2 mm
Identification
40-2