SEAT Workshop Service and Repair Manuals

Mecatronic unit for the asemi-automatic gearbox -J743 -: dismounting

–  Remove bolt -A- near pendulum support.   Note Some gearboxes, depending upon versions, may have two different screws There is a black plastic overflow tube in the hole (with an interior 8 mm nut, tightening torque: 3 Nm) is located behind the plug. Its length determines the oil level in the gearbox. –  Remove this oil pipe. Approximately 5.0 litres of oil should drain out. The oil extractor -SAT 1100- should remain under the gearbox. –  Thread overflow pipe back on, 3 Nm.

–  Remove the filter, where necessary. For further information, we recommend reading the notes on changing the oil filter → Anchor . –  Insert new filter with shoulder downwards and tighten cover to 20 Nm. –  Following repair work, it is not necessary to change filter again when filling oil.

–  Remove both -covers-. »Small« cover of oil pump and bolts of »large« cover must always be renewed. Likewise, seal of »large« cover must be renewed.

Before touching the mechatronic unit, touch an earthed object first .

–  Release connector -1- of gearbox input speed sender -G182- and oil temperature sender in multi-plate clutch -G509- using release tool -T10465- and pull connector off.

–  First pull line out of lower clip -arrow I-. –  Then remove it from second clip -arrow II- and lay to side. Do not kink line.

–  Remove -securing bolts- diagonally. Start with bolt -1-. All 10 -securing bolts- must be renewed.

–  Remove the mechatronic control unit -J743-. When working with the mechatronic control unit, special care should be taken with the »long« sensor arm.   Caution Never lift the mechatronic control unit by the sensor arm nor lean the unit on the arm.

If the arm is damaged, the mechatronic control unit must be replaced. –  Deposit the mechatronic control unit correctly.

Deposit the mechatronic control unit correctly.