heater RENAULT MEGANE SCENIC 1995 Service Repair Manual

Contents
Consumables
Identification
Oil consumption
Oil pressure
Engine - Gearbox
Engine and transmission assembly
Sump10-1
10-1
10-2
10-3
10-4
10-19
10-43
TOP AND FRONT OF ENGINE
Timing belt
Cylinder head gasketPage Page
11
Engine and
peripherals
11-1
11-12 ENGINE AND PERIPHERALS
10FUEL SUPPLY - PUMPS -
PREHEATING
Fuel supply
Fuel cut-out on impact
Fuel gallery
Injectors
Fuel filter
Pump flow
Supply pressure
Diesel equipment
Specifications
Description of the pump
Tightening torques (in daN.m)
Special notes
Idle speed settings
Microswitches
Pump
Pump - timing
Coded solenoid valve
Operating diagram
Pre-post-heating unit
Injector holder - heater plug
Fuel filter
Coolant temperature sensor
Inlet - exhaust manifolds
Pump
Brake assistance vacuum pump
Mechanical power assisted steering
pump13-1
13-3
13-8
13-9
13-10
13-11
13-15
13-16
13-17
13-18
13-20
13-22
13-23
13-27
13-28
13-29
13-30
13-36
13-37
13-39
13-40
13-41
13-4213
FUEL MIXTURE
Specifications
Throttle body
Inlet manifold
Exhaust manifold
Manifolds12-1
12-7
12-15
12-18
12-2012

ENGINES AND PERIPHERALS
Engine and transmission assembly
10
K7M engine
/ AT
- the heat shield from the exhaust manifold,
- the catalytic converter (disconnect the oxygen
sensor) and attach the exhaust pipe to the
body,
- the horn,
- the tie rod between the shock absorber
turrets,
- the air filter,
- the earth strap,
- the absolute pressure sensor,
- the expansion bottle and attach it to the
engine.
Disconnect:
- the accelerator cable and the kickdown switch
connector,
- the brake servo pipe,
- the relay plate and the engine connection unit
connectors,
98756R2
- the automatic transmission computer
connector,
- the canister pipe.Remove the battery mounting bracket.
Disconnect:
- the injection feed wire in the scuttle panel
and the starter feed wire,
- the fuel supply and return pipes using tool
Mot. 1311-06, unclipping them from their
mounting,
99461R
- the heater hoses on the thermostat.
Unclip the radiator and hold it to one side by
attaching it to the engine.
10-25

ENGINES AND PERIPHERALS
Engine and transmission assembly
10
F3R engine
- the accelerator and clutch cables,
- the heater hoses on the thermostat mounting.
Remove the battery mounting bracket.
Disconnect:
- the injection feed wire in the scuttle panel
and the starter feed,
98754R
- the brake servo pipe,
- the connectors for the fan, the relays, the
thermistor and the pressostat,
- the pipe on the canister,
- the upper and lower radiator hoses,
- the fuel return and supply pipes, unclipping
them from their mounting.Remove:
- the suspended engine mounting cap,
- the injection computer mounting and attach
it to the engine,
- the expansion bottle and attach it to the
engine,
- the absolute pressure sensor,
- the accessories belt (see section 11).
Unclip the power assisted steering reservoir.
Disconnect the compressor feed wire (if fitted).
Remove:
- the four mounting bolts for the air
conditioning compressor (if fitted), move it to
one side and attach it to the front of the
vehicle,
- the earth strap,
- the nut and eccentric bolt (1) (use a roll pin
punch) from the steering yoke after pushing
the protector back.
97390-1R
10-31

ENGINES AND PERIPHERALS
Engine and transmission assembly
10
F8Q engine
Remove:
- the preheating unit (attach it to the engine),
- the fuel return union on the injection pump.
Disconnect:
- the fuel supply pipe on the diesel fuel filter
using tool Mot. 1311-06,
99461R
- the altimetric sensor connector,
- the relay plate and the engine connection unit
electrical connector,
98756R
- the feed wire for the preheating unit in the
scuttle panel and the starter feed.
98754R
- the heater hoses on the thermostat mounting,
98904R1
10-38

TOP AND FRONT OF ENGINE
Cylinder head gasket
11F8Q ENGINE
99028R
Diagram for drilling tool Mot. 1159 (diameter 10.5
mm).
Fit the bracket of tool Mot. 1159 under the water
pump.
99310R
98904S
Disconnect:
- the thermostat hoses,
- the connectors for the sensors,- the brake servo pipe,
- the 2 oil vapour rebreathing hoses on the decan-
ter,
- the accelerator cable,
- the preheater plug connector,
- the injection pump connectors,
- the solenoid valve pipes,
- the fuel supply pipe to the diesel fuel filter using
tool Mot. 1311-06
99461R
Remove the cylinder head bolts using the star
socket 55 toolEX 255
FACOM for example.
11-24

FUEL MIXTURE
Inlet manifold
12
E7J engine
Manifold nuts 2.5
TIGHTENING TORQUES (in daN.m)
REMOVAL
To remove the manifold, the throttle body must
be removed (see previous pages).
There are no special notes for removal.
The inlet manifold is fitted with an electrical
heater (2) with a PTC type resistance (positive
temperature coefficient).
This is mounted in the inlet manifold, opposite
the throttle, and is secured by a circlip.
The heater is fed via a relay by the computer up to
a coolant temperature of 68°C.
If the coolant temperature sensor is faulty, the
heater is permanently fed.
PRM1202
1Retaining circlip.
2 Electrical heater.
3Seal.
REFITTING
When refitting, replace the manifold gasket and
bleed the cooling circuit.
12-15

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

DIESEL EQUIPMENT
Pre-post-heating unit
13
LOCATION
Pre-post-heating unit (A)
This unit has two diodes to prevent the feeding of
the heater plugs when the air conditioning system
is operating and also has a CTN type air
temperature sensor.Coolant temperature sensor (1) (black connector)
99335R
BAir conditioning diaphragm control solenoid
valve on injection pump (fast idle)
CEGR control solenoid valve
98904R
SPECIFICATIONS
Temperature in °C ± 1Resistance Ω
252 610 to 2 990
80310 to 350
13-31

DIESEL EQUIPMENT
Pre-post-heating unit
13
PRINCIPLE OF OPERATION FOR GAS PRE-POST-
HEATING
1. "Pre-heating" when the ignition is turned on
a) Variable pre-heating
The time period during which the warning
light is illuminated and the heater plugs
are fed is dependent on the coolant
temperature.3. "Post-heating" while the engine is running
Post-heating has two phases:
a) Fixed post-heating
After the engine has been started, the
plugs are for for 10 seconds.
b) Variable post-heating
Variable post-heating begins when fixed
post-heating has ended.
During this phase, the plugs are fed
alternately 1 - 3 and 2 - 4 depending on
the coolant temperature.
If the coolant temperature sensor is faulty,
the heater plugs are fed systematically for
14 seconds.
b) Fixed pre-heating
After the pre-heating warning light has
extinguished (variable pre-heating), the
plugs remain fed for up to 8 seconds
before the engine is started.
2. Starting
The plugs remain fed while the starter is
activated.If the coolant temperature sensor is faulty,
the heater plugs are fed systematically for
30 seconds.
Variable post-heating may be
interrupted:
- finally when the coolant temperature
> 65°C,
- momentarily when the unit receives
full load information (post-heating
microswitch opens) for more than 1
second ; post-heating begins again
when the engine returns to idle speed
or low load (microswitch closes).
DI1304
DI1305
13-32