power steering RENAULT MEGANE SCENIC 1995 Service Service Manual

INJECTION
Location of components
17
K7M engine
19EGR solenoid valve
99358-2R
18Power assisted steering pressostat
99362R
17-14

INJECTION
Idle speed correction
17
POWER ASSISTED STEERING PRESSOSTAT - INJECTION COMPUTER CONNECTION (K7M and E7J engines)
The injection computer receives information from the power assisted steering pressostat. This depends on the
pressure in the hydraulic circuit. The higher the pressure, the more energy is used by the power assisted
steering pump.
The injection computer, to compensate for this energy use, increases the percentage opening of the idle
speed regulation stepping motor for the K7M engine or adjusts the idle speed micromotor for the E7J
engine.
The information is received on track 13 (K7M engine) and track 8 (E7J engine) on the injection computer.
Pressostat closed, the computer receives an earth. The idle speed is adjusted to 820 rpmfor the K7M engine
and 825 rpm for the E7J engine.
IDLE SPEED CORRECTION DEPENDING ON THE BATTERY VOLTAGE (F3R engine)
This correction compensates for the drop in voltage due to operation of consumers when the battery is poorly
charged. To do this, the idle speed is increased, allowing the alternator to rotate more and consequently
increase the charging voltage.
The lower the voltage, the greater the degree of correction. Correction of the engine speed is therefore
variable. It begins when the voltage drops to below 12.7 Volts. Correction begins at the nominal engine
speed and may reach a maximum of 910 rpm.
IDLE SPEED CORRECTION DEPENDING ON HEATED WINDSCREEN INFORMATION
The E7J engine has no heated windscreen.
If the heated windscreen function is selected, the computer receives + 12 V information :
on track 6 for K7M engines
on track 5 for F3R engines.
If the coolant temperature is less than 60°C, the idle speed is set to :
- 1 000 rpm (F3R engine)
- 850 rpm (K7M engine)
17-32

INJECTION
Operating wiring diagram
17
KEY TO OPERATIONAL WIRING DIAGRAMS (E7J, F3R, K7M)
COMPONENT NO DESCRIPTION
109
119
120
146
147
149
193 to 196
218
222
224
225
228
236
238
242
244
247
250
272
310
319
341
371
398
437
565
597
645
649
663
664
679
746
772
777
927
MF
MHOn board computer
Automatic transmission computer
Injection computer
Pinking sensor (located under the inlet manifold for E7J engine)
Absolute pressure sensor
TDC sensor
Injectors
Fuel pump
Throttle position potentiometer
Power assisted steering pressostat
Diagnostic socket
Idle speed regulation micromotor
Fuel pump relay (in engine fuse box)
Injection feed locking relay
Oxygen sensor
Coolant temperature sensor
Instrument panel
Vehicle speed sensor
Air temperature sensor
Ignition power module
Air conditioning control panel
Idle speed regulation solenoid valve
Fuel vapour recirculation solenoid valve
Exhaust gas recirculation solenoid valve (EGR)
Throttle body heater (under throttle body)
Throttle body assembly
Engine fuse box
Passenger compartment connection unit
Idle speed regulation stepping motor
Dual ignition coil n°1 (cylinders 1 and 4)
Dual ignition coil n° 2 (cylinders 2 and 3)
Radio anti-interference condenser
Cylinder reference sensor
Heater relay (in engine fuse box)
Power fuse board (near battery)
Inertia switch
Rear right hand electrical earth
Engine electrical earth (located on the cylinder block between the starter and the al-
ternator for the E7J engine)
17-39

INJECTION
Operating wiring diagram
17
E7J engine
COMPUTER TRACK ALLOCATION
TrackALLOCATION
1Power earth
2Electronic earth
3Vehicle speed information
4+ before ignition (permanent) computer memory
5Canister bleed signal (sequential earth period)
6Pump relay control (via track N° 2)
7Locking relay control (via track N° 2)
8Diagnostic line for erasing the memory and power assisted steering pressostat information
9Throttle position potentiometer information (pin N° 4 on 222)
10Heater relay command
11TDC sensor signal (track B)
12Rev counter information at instrument panel
13Connection with injection fault warning light on instrument panel
14Air temperature information
15Coolant temperature information
16+ 5 V feed for absolute pressure sensor and throttle potentiometer
17Common earth for absolute pressure sensor, throttle potentiometer and coolant temperature
sensor
18Emission of diagnostic signal to diagnostic socket
19Main computer feed via injection locking relay
20Air conditioning compressor command
21Injector control via earth
22Not used
23+ or - feed to idle speed micromotor (pin N° 1)
24+ or - feed to idle speed micromotor (pin N° 2)
17-41

INJECTION
Operating wiring diagram
17
K7M engine
COMPUTER TRACK ALLOCATION
TrackALLOCATION
1Not used
2Power earth n° 1
3Power earth n° 2
4Command for injector n° 2 and n° 3 via earth
5Air conditioning on - off information and request for compressor operation authorisation
(0 - 12 V)
6Heated windscreen information (0 - 12 V)
7Park / Neutral / torque reduction information (0 - 5 V) (K7M 703)
8Pinking sensor signal
9Stepping motor control (0 - 12 V)
10EGR solenoid valve control (0 - 12 V) (K7M 703)
11Bi-directional diagnostic line K used for entry into fault finding mode
(looking for computer), emission of diagnostic signals from computer, application of command
modes (G..*), erasing the memory (G0**)
and ending fault finding (G13*)
12Vehicle speed information
13Power assisted steering pressostat information
14Not used
15Coolant temperature sensor information
16Manifold pressure information transcribed by absolute pressure sensor
17Voltage information from oxygen sensor
18Earth
19Throttle position potentiometer information
20Air temperature sensor information
21Not used
22Not used
23Not used
24+ 12 V after ignition
17-44

COOLING
Radiator
Unclip the power assisted steering reservoir.
Remove:
- the 4 mounting bolts from the fan mounting
on the radiator and remove it,
- the 4 mounting bolts for the condenser on the
radiator,
19
Unclip the grille at (D) using a screwdriver and re-
lease the sides by lifting the tabs at (E).
99187R1
Remove the 6 mounting bolts for the upper cross
member and remove it.
98838R
99611R
- the radiator.
REFITTING
Refitting is the reverse of removal.
Fill and bleed the cooling circuit.
Disconnect the upper radiator hose by removing
the air filter inlet sleeve.
F8Q ENGINE / AC
19-5

MANUAL GEARBOX
Gearbox (Removal - Refitting)
21
Remove gear control, bolt (F). Special notes for the F engine
Under the vehicle, remove the 2 mounting bolts
(B) from the power assisted steering pipe clamps.
Disconnect:
- the wires from the starter motor,
- the reversing light switch,
- the speedo cable.
Remove the engine/gearbox mounting nut. F
engine
98749R1
Remove the 2 bolts (H) from the engine-gearbox
tie-rod.
98902R
Slacken the 2 mounting bolts (C) on the engine
from the engine-gearbox tie-rod.
85812-1R
85966R1
21-13

MANUAL GEARBOX
Gearbox (Removal - Refitting)
21
Remove the steering box mounting bolts.F
engine
98868-1R
Remove the mounting bolts of the power assisted
steering pipes from the sub-frame.
Secure the steering box to the side members.
Special notes for vehicles fitted with driver’s
AIRBAG
98836R1
97390-1R1
Remove the horn.
From above:
Secure the cooling assembly to the upper cross
member.
Remove the upper mounting bolt from the bum-
per then the bolts located in the wheel arches. Release the steering box and the steering column
(be careful not to damage the clip (C)).
ATTENTION :
to prevent any damage being done to the rota-
ting switch under the steering wheel, please fol-
low these instructions :
- before releasing the steering column and the
rack, the steering wheel MUST be immobilised,
wheels straight, using the "steering wheel
locking" tool throughout the duration of the
repair,
- any doubts regarding the correct centring of
the rotating switch means that the steering
wheel has to be removed so as to apply the
centring method as described in chapter 88
"AIR-BAG".
REMINDER: in this case, only qualified personnel
who have received specific training may under-
take this work.
21-16

MANUAL GEARBOX
Gearbox (Removal - Refitting)
21
F
engine
86308R2
86415S
Position the sub-frame support trolley and lower
the vehicle.
Remove the sub-frame by loosening the 4 moun-
ting bolts.
Be careful not to forget to remove the power as-
sisted steering pipe mounting from the sub-
frame.
Under the vehicle :
- position the component jack under the gearbox
without lifting it,
- release the gearbox and the engine by remo-
ving the studs (C).
98755R1
Refit:
- the assembled support,
- the sub-frame,
- the steering.
Refit:
- the heat screen,
- the exhaust downpipe,
- the suspended engine mounting bar.
Refit the other components by carrying out the re-
moval operations in reverse.
REFITTING
Coat the sides of the guide tube and the fork pads
with
MOLYKOTE BR2 grease.
Position the fork on the notches of the clutch
thrust pad.
Offer the gearbox up using the component jack.
Connect the engine to the gearbox.
Check that the dowels for centring the engine-
gearbox are present and are in the correct posi-
tion.
21-17

AUTOMATIC TRANSMISSION
Automatic transmission (Removal - Refitting)
23
K7M
ENGINE
Lower the final drive until the tool touches the
ground.
Remove:
- the shock absorber upper mounting bolts,
- the sub-frame mounting bolts. Secure Mot. 1040-01 under the sub-frame.
Extract the engine and transmission assembly by
lifting the body.
Secure the spring-shock absorber assembly with
rope.
Separate the engine and transmission assembly
from the sub-frame by removing:
- the upper radiator hose,
- the power assisted steering reservoir and the
pump,
- the power assisted steering pipe mounting on
the automatic transmission.
Unclip the wiring loom from the sub-frame.
Position the lifting tool.
Remove:
- the right hand mounting,
- the engine tie-bar.
Release the driveshafts.
99588S
98755R
PRG23.3
23-18