RENAULT MEGANE SCENIC 1995 Service Repair Manual

AUTOMATIC TRANSMISSION
Differential output seal
23
REMOVAL
Using a screwdriver, remove the protective shield
(A).
1) REPLACING A LEFT OR RIGHT HAND LIP SEAL
SPECIAL TOOLING REQUIRED
B. Vi. 1322Tool for fitting differential
output seals
97725R
The shield is fitted tight.Using a screwdriver, remove the seal taking care
not to damage the differential bolt as well as the
output shaft.
97746S
PRG23.4
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AUTOMATIC TRANSMISSION
Differential output seal
23
REFITTING
The lip seal (oiled) is positioned using toolB.Vi.
1322 (this determines the correct position of the
seal).
SPECIAL TOOLING REQUIRED
B. Vi. 1323Tool for fitting differential
output seals
97746-1S
Refit the protective heat shield in the opposite or-
der to removal using a 45 mm diameter socket.
95791-5R
2)REPLACING THE O-RING
The principle is the same on both sides, but only
one side must be removed at a time.
Special notes:
The is no flange on the driveshaft outputs, but ins-
tead a simple splined end piece protected by a
shield.
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AUTOMATIC TRANSMISSION
Differential output seal
23
REFITTING
Refit the nut, turning the same number of turns as
when it was removed.
Align the marks made on the nut and the sump.
Replace the bolt (D) and the locking plate (E).
Refit the shield after having replaced the lip seal if
necessary (see paragraph 1).
Fill the final drive with oil.
95791-2R
REMOVAL
Drain the final drive and remove the shield, as ex-
plained in paragraph 1.
Locate the position of the nut (F) with respect to
the sump by putting a mark on one of the teeth
and on the face of the sump.
Remove bolt (D) and the locking plate (E) from the
nut using tool B.Vi. 1323, remove the nut, coun-
ting the number of turns it takes.Replace the O-ring on the nut, cleaning the seat
properly and lubricating the new seal with final
drive oil.
95791-6R
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AUTOMATIC TRANSMISSION
Wiring
23
The new generation of A4.2 automatic transmission is fitted with monoblock wiring which means that many
of the intermediate connectors are no longer required. As a result, the method for repairing sensors or
switches is different.
PRG23.5
1 - 55 track connector on the automatic transmission computer
2 - Oil pressure sensor
3 - Electro-hydraulic interface (sealed connector)
4 - Inter engine unit connection
5 - Injection/diagnostic connector
6 - Pressure sensor connector
7 - Speed sensor
8 - Multifunction switch
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AUTOMATIC TRANSMISSION
Wiring
23
REPAIRING COMPONENTS
Most of the components comprising the mono-
block wiring are not directly interchangeable.
Only the pressure sensor can be replaced without
having to cut the cable.
REPAIRING THE MULTIFUNCTION SWITCH
Initially, this is checked with the 55 track connec-
tor using the bornier Sus. 1228 and the table be-
low.
If this checking procedure highlights a fault, sec-
tion the cable 15 cm from the switch and check
between the section and the 55 track connector.
See the wiring diagram and table below. If one of the insulations or one of the continuities
is not assured, replace the multifunction switch
and refer to note 8074 for the repair procedure.
Refer to notes 8074 and 8075 for repairing the
speed sensor and using the locally made lifting
plate.
99613S4
NOTE: remember to distribute the connection
joints.
LEVER POSITION ASSURED CONTINUITIES ASSURED INSULATIONS
P/N Terminal 44 / EarthTerminals 51 and 52 / Earth
Terminal 27 / Terminal 46
R Terminal 27 / Terminal 46Terminals 44, 51 and 52 /
Earth
D NoneTerminals 44, 51 and 52 /
Earth
Terminal 27 / Terminal 46
3 Terminal 51 / EarthTerminals 44 and 52 / Earth
Terminal 27 / Terminal 46
2 Terminals 51 and 52 / EarthTerminal 44 / Earth
Terminal 27 / Terminal 46
1 Terminal 52 / EarthTerminals 44 and 51 / Earth
Terminal 27 / Terminal 46
99585S
23-24

AUTOMATIC TRANSMISSION
Wiring
23
Removing the wiring assembly is specific to the
AD4 A4.2.
REMOVAL
Put the vehicle on a two post lift.
Disconnect the battery.
Remove the front left hand wheel.
From the wheel arch:
Remove:
- the earth wire from the multifunction sensor,
- the multifunction sensor mounting bolt (A).
On the vehicle:
- position the lifting plate (tool made locally as
described on the next page).
99586R1
99182S
99613S
98750R1
Remove the engine torque traction link on the
gearbox side.
Remove the speed sensor (mounting bolt (B)).
Remove gear selector control ball joint (C).
Remove all the wiring assembly, taking note of its
position and mountings so that is refitted
correctly.
Disconnect the 52 track connector and the
connector in the inter engine unit. Fit the engine support tool with the support
bracket on the left hand side.
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AUTOMATIC TRANSMISSION
Wiring
23
There are two possible solutions for manufactu-
ring this plate.
1)By modifying the existing plate on the E7J en-
gine (air filter support plate mounted onto the
cylinder head).
2)By having it manufactured locally
Parts list: - 1 plate of thickness 4 or
5 mm in semi-hard steel,
-
2 HEX M8 × 20 bolts (collar
bolts).
99613S1
99585R
Disconnect the connectors from the pressure sen-
sor and the diagnostic/injection socket.
Disconnect the sealed connector switch.
Remove the wiring.
99613S2
REFITTING
Replace the wiring without securing it.
Refit:
- the speed sensor,
- the multifunction sensor.
Refit the mounting on the gearbox side.
Remove the engine support tool.
Reconnect all the components.
Secure the wiring using its clips.
LIFTING PLATE
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AUTOMATIC TRANSMISSION
Wiring diagram
23
104 - Ignition switch
119 - Automatic transmission computer
120 - Injection computer
129 - ECO/PERF selector switch
160 - Stop switch
163 - Starter motor
225 - Diagnostic socket
247 - Double headlight relay
250 - Speed sensor
303 - Automatic transmission selector lighting
319 - Air conditioning control panel
535 - ECO/PERF selector switch warning light
569 - 4 speed automatic transmission kickdown
597 - Engine fuse box
645 - Passenger compartment connection unit
754 - Electrical/hydraulic interface
779 - Automatic transmission multifunction switch
780 - Automatic transmission turbine or vehicle speed sensor
781 - Line pressure sensor
R22 - Engine/automatic transmission
R34 - Engine/dashboard
MH - Engine electric earth
MJ - Front right pillar electric earth
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AUTOMATIC TRANSMISSION
Wiring diagram
23
98463S
23-28

AUTOMATIC TRANSMISSION
Checking the "timing point" on the converter
23
Put the vehicle on a two post lift.
Lift the vehicle until the wheels are a few centime-
tres off the ground.
Connect the
XR25.
Put the
ISO switch on S8.
Enter the A4.2 transmission code :
D14
then #06 to display the engine speed.
Accelerate fully with the brake fully on.
The engine speed should stabilise to :
-K7M engine: 2430 rpm.
If this value is not correct, replace the converter.
A timing point which is more than 200 rpm. below
the specified value requires the automatic trans-
mission to be replaced.
NOTE : for all diagnostic questions, refer to MR
TA.A, "General".
23-29