Page 61 of 135

21B-1
SEQUENTIAL GEARBOX
Sequential gearbox: Precautions for the repair
D4F, and JH1
21B
I - SEQUENTIAL GEARBOX
II - SEQUENTIAL GEARBOX COMPUTER
To disconnect the computer, switch off the ignition and
wait for 1 minute.
III - ELECTRO-HYDRAULIC UNIT
Discharge the pressure accumulator using the Diag-
nostic tool before any operation on the electro-hy-
draulic unit.
Be careful not to twist the high pressure pipes when re-
moving the electro-hydraulic unit.
IV - GEAR SELECTION SENSOREquipment required
Diagnostic tool
IMPORTANT
Before any operation on the sequential system, dis-
charge the accumulator using the Diagnostic tool.
WARNING
If any operation is carried out on the electro-hydrau-
lic unit, it is essential to clean the unit using a clean-
ing product and compressed air.
Never leave the circuit open and never use a high
pressure cleaner.
WARNING
After the accumulator has been fully filled (15 sec-
onds after the ignition has been switched on): the
oil level is at the MINIMUM mark.
WARNING
To remove the gear selection sensor it is essential
that you shift to first gear before removal.
Page 62 of 135
21B-2
SEQUENTIAL GEARBOX
Sequential gearbox: List and location of components
D4F, and JH1
21B
122171
(1) Actuator module high pressure
supply pipe
(2) Clutch stay high pressure supply
pipe
(3) Reservoir retur n hose
(4) Engagement solenoid v alve 2
(5) Solenoid valve unit pressure
sensor
(6) Clutch position sensor
(7) Tank
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(8) Pump unit
(9) Actuator module
(10) Gear selection sensor
(11) Clutch solenoid valve
(12) Engagement solenoid valve 1
(13) Selection solenoid valve 3
(14) Selection solenoid valve 4
(15) Engagement sensor
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(16) Sequential gearbox speed sen-
sor
Page 74 of 135
21B-14
SEQUENTIAL GEARBOX
Electro-hydraulic unit: Removal - Refitting
D4F, and JH1
21B
Selector shaft locked
Selector shaft unlocked
aUnlock the gear selector shaft by turning the shaft by
a quarter of a turn using a screwdriver.aDetach the breather pipe (12) :
-from the sequential gearbox lifting eye (13) ,
-from the cooling hose (14) .
aDisconnect the sequential gearbox speed sensor
connector (15) using a screwdriver on the lock (16) .
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17969122314
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Page 76 of 135

21B-16
SEQUENTIAL GEARBOX
Electro-hydraulic unit: Removal - Refitting
D4F, and JH1
21B
aIt is essential to replace the electro-hydraulic unit
seal.
aPlace the actuator module selector shaft in a raised
and locked position.
II - REFITTING OPERATION FOR PART
CONCERNED
aFit:
-the new electro-hydraulic unit seal,
-the electro-hydraulic unit.
aRefit:
-the sequential gearbox lifting eye on the sequential
gearbox,
-the breather pipe on the sequential gearbox.
-the electro-hydraulic unit nuts,
-the electro-hydraulic unit bolts.
aConnect the sequential gearbox speed sensor con-
nector.
aAttach the breather pipe:
-to the cooling hose,
-to the sequential gearbox lifting eye.aPress on the selector shaft with a screwdriver to clip
the sequential gearbox selector shaft to the actuator
module.
aRefit the clutch stay cable to the clutch fork.
aConnect the electro-hydraulic unit connector by
moving the lock.
III - FINAL OPERATION
aRefit:
-the selector shaft cover,
-the selector shaft cover bolt.
aFit the left-hand suspended mounting on the body.
aFit the left-hand suspended engine mounting bolts
without tightening them.
aTorque tighten the left-hand suspended engine
mounting bolts (21 N.m).
aRaise the sequential gearbox to its original position.
aFit the left-hand suspended engine mounting rubber
pad.
aFit the left-hand suspended engine mounting rubber
pad bolts without tightening them.
aTorque tighten the left-hand suspended engine
mounting rubber pad bolts ( 62 N.m).
aFit the left-hand suspended engine mounting rubber
pad nut without tightening it.
aTorque tighten the left-hand suspended engine
mounting rubber pad nut (105 N.m ).
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Page 84 of 135
21B-24
SEQUENTIAL GEARBOX
Solenoid valves: Removal - Refitting
D4F, and JH1
21B
1 - Removing engagement solenoid valve 1,
selection solenoid valve 3 and selection solenoid
valve 4
a
aRemove the solenoid valve affected, following the
correct removal order for the solenoid valves:
-the clutch solenoid valve (13) ,
-selection solenoid valve 4 (14) ,
-selection solenoid valve 3 (15) ,
-engagement solenoid valve 1 (16) .2 - Removing engagement solenoid valve 2
aDisconnect the following connectors :
- (17) from the solenoid valve unit pressure sensor,
- (18) from engagement solenoid valve 2.
aRemove the actuator module wiring harness.
122172
Note:
Prepare for oil to flow out of the electro-hydraulic
unit.
122320
Page 85 of 135

21B-25
SEQUENTIAL GEARBOX
Solenoid valves: Removal - Refitting
D4F, and JH1
21B
a
aRemove:
-the bolts (19) from engagement solenoid valve 2,
-engagement solenoid valve 2.
REFITTING
I - REFITTING PREPARATION OPERATION
aIt is essential to replace the engagement or clutch
solenoid valve seal.
II - REFITTING OPERATION FOR PART
CONCERNED
1 - Refitting engagement solenoid valve 1,
selection solenoid valve 3 and selection solenoid
valve 4
aRefit the affected solenoid valve, following the cor-
rect removal order for the solenoid valves:
-engagement solenoid valve 1 fitted with its new
seal,
-selection solenoid valve 3,
-selection solenoid valve 4,
-the clutch solenoid valve fitted with its new seal.2 - Refitting engagement solenoid valve 2
aRefit:
-engagement solenoid valve 2 fitted with its new
seal,
-engagement solenoid valve 2 bolts.
aConnect the connectors:
-to engagement solenoid valve 2,
-to the solenoid valve unit pressure sensor.
III - FINAL OPERATION
1 - Refitting engagement solenoid valve 1,
selection solenoid valve 3 and selection solenoid
valve 4
aFit the electro-hydraulic unit connector mounting.
aRefit the electro-hydraulic unit connector mounting
bolts.
aClip the pump assembly supply connector onto the
electro-hydraulic unit connector mounting.
aConnect the pump assembly supply connector.
aRefit:
-the sequential gearbox lifting eye on the sequential
gearbox,
-the sequential gearbox lifting eye nut,
-the breather pipe on the sequential gearbox.
aAttach the breather pipe:
-to the cooling hose,
-to the sequential gearbox lifting eye.
2 - Refitting engagement solenoid valve 2
aFit the left-hand suspended engine mounting to the
body.
aFit the left-hand suspended engine mounting bolts
without tightening them.
aTorque tighten the left-hand suspended engine
mounting bolts (21 N.m).
aRaise the sequential gearbox to its original position.
aFit the left-hand suspended engine mounting rubber
pad.
aFit the left-hand suspended engine mounting rubber
pad bolts without tightening them.
aTorque tighten the left-hand suspended engine
mounting rubber pad bolts ( 62 N.m).
122319
Note:
Prepare for oil to flow out of the electro-hydraulic
unit.
Page 87 of 135

21B-27
SEQUENTIAL GEARBOX
Engagement sensor: Removal - Refitting
D4F, and JH1
21B
REMOVAL
I - REMOVAL PREPARATION OPERATION
aPosition the vehicle on a two-post lift (see Vehicle:
Towing and lifting) (MR 411, 02A, Lifting equip-
ment).
aRemove the front left-hand wheel (see Wheel: Re-
moval - Refitting) (MR 411, 35A, Wheels and ty-
res).II - OPERATION FOR REMOVAL OF PART
CONCERNED
aDisconnect the engagement sensor connector (1) .
aRemove:
-the engagement sensor bolts (2) ,
-the engagement sensor.
REFITTING
I - REFITTING OPERATION FOR PART
CONCERNED
aRefit:
-the engagement sensor,
-the engagement sensor bolts.
aConnect the engagement sensor connector.
II - FINAL OPERATION.
aRefit the front left-hand wheel (see Wheel: Removal
- Refitting) (MR 411, 35A, Wheels and tyres).
aCarry out the necessary operations using the Diag-
nostic tool (see Fault finding - Replacement of
components) (MR 413, 21B, Sequential gearbox). Equipment required
Diagnostic tool
IMPORTANT
Before carrying out any operation on the sequential
system, discharge the accumulator using the diag-
nostic tool.
IMPORTANT
Consult the safety and cleanliness advice and oper-
ation recommendations before carrying out any
repair (see 21B, Sequential gearbox, Sequential
gearbox: Precautions for the repair, page 21B-1)
.
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Page 91 of 135

21B-31
SEQUENTIAL GEARBOX
Gear selection sensor: Removal - Refitting
D4F, and JH1
21B
REMOVAL
I - REMOVAL PREPARATION OPERATION
aEngage first gear
aRemove:
-the battery (see Battery: Removal - Refitting)
(MR 411, 80A, Battery),
-the sequential gearbox computer (see 21B, Se-
quential gearbox, Sequential gearbox convert-
er: Removal - Refitting, page 21B-47) ,
-the battery tray (see Battery tray: Removal - Re-
fitting) (MR 411, 80A, Battery),
-the petrol injection computer (see Petrol injection
computer: Removal - Refitting) (MR 411, 17B,
Petrol injection).
aDetach from the petrol injection computer mounting:
-the cooling hose,
-the sequential gearbox computer wiring harness,
-the petrol injection computer wiring harness,
-the battery wiring harness.aRemove:
-the petrol injection computer mounting nut (1) ,
-the engine wiring harness nut (2) from the petrol in-
jection computer mounting,
-the petrol injection computer mounting bolts (3) .
aRemove the engine wiring harness from the petrol
injection computer mounting.
aRemove the petrol injection computer mounting. Equipment required
Diagnostic tool
IMPORTANT
Consult the safety and cleanliness advice and oper-
ation recommendations before carrying out any
repair (see 21B, Sequential gearbox, Sequential
gearbox: Precautions for the repair, page 21B-1)
.
WARNING
To remove the gear selection sensor it is essen-
tial that you shift to first gear before removal.
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