SEAT Workshop Service and Repair Manuals

Mecatronic unit for the semi-automatic gearbox -J743 -: Install Before touching mechatronic unit, touch an earthed object → Anchor. Installation is carried out in the reverse sequence; note the following:

–  Place the mechatronic control unit -J743- on the gearbox casing carefully.   Note t  The side cover should not be removed in order to remove other parts t  For reasons of illustration, the cover on the side has been removed in the figure. –  Do not pinch wiring. Take care not to trap the cable. –  Carefully set mechatronic unit on dowel pins -arrow-. Ensure that »sender arm« locates in its -fitting position-. –  Look to see if mechatronic unit has made contact correctly.

–  Screw in new bolts -1- through -10- hand-tight. –  Tighten bolts in given order to 5 Nm + 90° (1/4 turn). –  Hook line -A- first in upper retaining lug, and then in lower -arrows-. –  Push on connector and engage.

–  Replace the two -O-rings- if the »old« mechatronic control unit is to be reassembled. –  Lubricate the O-rings with gearbox oil for DSG dual clutch. –  Clean cover seal and sealing surfaces on gearbox. –  Ensure proper seating of seal. –  Put the cover on the mechatronics. Do not attach any tubes in doing so.

–  Insert new bolts -arrows- and tighten diagonally in several stages to 10 Nm. –  Push on connector for mechatronic unit for dual clutch gearbox -J743- and engage lock by turning.

–  Set new oil pump cover -A- in place and tighten bolts -arrows- diagonally in several stages to 8 Nm. –  Attach wire retainer to cover and tighten nuts to 10 Nm. –  Push on connector for mechatronic unit for dual clutch gearbox -J743- and engage lock by turning. –  If fitted, fit the hose joining the intercooler and the booster air pipe → Rep. gr.21. –  Reinstall any parts which may have been removed from the vehicle.

–  Fit the cable support on the large cover and tighten the nuts to a torque of 10 Nm. –  Reinstall any parts which may have been removed from the vehicle. –  Connect the battery earth strap → Electrical system; Rep. gr. 27

–  Do not start the engine. –  Please renew filter if oil is contaminated → Chapter. –  Connect → Vehicle diagnostic tester. –  Fit the oil tray -SAT 1100- under the drain plug of the gearbox.

–  Remove oil drain plug close to pendulum support -arrow-.

–  Before screwing adapter for oil filling -VAS 6262 A- onto oil bottle, measure length of breather pipe, dimension -a- and shorten → Anchor. Dimension -a- = 210 mm   Note The dimension -a- is measured from the shaft (green area in the counting glass) of the adapter for oil filling -VAS 6262 A-.

–  Screw the adapter for filling -VAS 6262 A- hand tight into the inspection hole.

–  Shake bottles before opening. –  Fill 3 litres of oil. –  To change the bottle, the valve must be closed or the adapter for the oil filling -VAS 6262 A- must be held above the gearbox. Next, start engine, check oil level and top up oil. The adapter for the oil filling -VAS 6262 A- must remain installed. –  Check the oil level and top-up if necessary → Chapter. –  Mount the noise insulation element → Bodywork, exterior installation work; Rep. gr.50. –  Make the basic adjustment using the central diagnosis -VAS 505X-.