MECHATRONIC Unit

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Special tools and workshop equipment required

Puller T10271
Assembly Pin T40199

Removing

Transmission installed.

NOTE:

Clean working conditions for the automatic transmission. Refer to CLEAN WORKING CONDITIONS .

General repair instructions, refer to REPAIR INFORMATION .

Always replace the Mechatronic unit if it is dirty or defective.

CAUTION:

There is a risk of damaging the transmission.

Do not start the engine if there is no ATF in the transmission and if the Mechatronic is removed.

-- Move the selector lever into P.

-- Turn off the ignition and remove the key.

-- Remove the ATF oil pan. Refer to AUTOMATIC TRANSMISSION FLUID OIL PAN .

-- Remove the ATF filter. Refer to ATF FILTER .

CAUTION:

There is a risk of destroying the transmission control module (Mechatronic) with static discharge.

Always discharge the static electricity. Do this by touching a grounded object, for example vehicle ground, the vehicle or the hoist.
Do not touch contacts in transmission connector with hands.

-- Disconnect the connector on transmission by rotating screw connections counter-clockwise -arrow-.

Fig 1: Disconnecting Connector On Transmission By Rotating Screw

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-- Remove the bolt -1-.

-- Turn the connector housing -2- counter-clockwise -arrow- and remove it.

Fig 2: Turning Connector Housing

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-- Remove the bolts in the following sequence: -19 to 1-.

Fig 3: Mechatronic, Tightening Sequence

Courtesy of AUDI OF AMERICA, LLC

CAUTION:

Risk of causing damage to the Mechatronic.

Only the bolts with a T40 TORX® bolt head may be loosened.
If other bolts are loosened, this may affect the function of the Mechatronic unit or it may come apart.

-- Remove the Mechatronic from the transmission.

CAUTION:

Danger of damaging the sensor on the back side of the Mechatronic.

Lay the Mechatronic with the bolt head side facing down only.

Installing

Tightening specifications, refer to ATF PAN, ATF STRAINER AND MECHATRONIC OVERVIEW .

NOTE:

Replace the Mechatronic O-rings and bolts.

-- Install new O-rings -1- and -3- into the grooves in the oil pipes.

Fig 4: Installing New O-Rings Into Grooves In Oil Pipes

Courtesy of AUDI OF AMERICA, LLC

-- Insert the ATF pipe -2- into the Mechatronic.

-- Check the oil pipes for damage and make sure they fit securely inside the Mechatronic.

-- Remove the sealing sleeve using the T10271 and install a new sleeve.

Fig 5: Removing Sealing Sleeve Using T10271 And Install A New Sleeve

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-- Install the four T40199 hand-tight, as illustrated.

Fig 6: Installing Four T40199 Hand-Tight, As Illustrated

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NOTE:

The T40199 prevent the Mechatronic from tilting when it is being installed. Also, the oil pipes on the back of the Mechatronic will not get damaged.

Fig 7: Installing New O-Rings Into Grooves In Oil Pipes

Courtesy of AUDI OF AMERICA, LLC

The spring clip on the back of the Mechatronic prevents the Mechatronic from being mounted flush on the transmission housing.

It is recommended to have a second technician help when installing the Mechatronic.

-- Carefully mount the Mechatronic on the transmission housing.

The selector lever -A- must fit into the bracket -C- for the multifunction transmission range switch -F125- -arrow 1-, move the bracket -C- if necessary.

Fig 8: Selector Lever Must Fit Into Bracket For Multifunction Transmission Range Switch
Courtesy of AUDI OF AMERICA, LLC
The selector lever -A- must fit into the selector slide -B- -arrow 2-. Move the selector slide -B- if necessary.

-- Install the bolts -1 through 4- by hand until the bolt heads make contact.

Fig 9: Mechatronic, Tightening Sequence

Courtesy of AUDI OF AMERICA, LLC

-- Remove the four T40199.

-- Tighten the bolts on the Mechatronic in the specified tightening sequence MECHATRONIC, TIGHTENING SPECIFICATION AND SEQUENCE .

Install in reverse order, paying attention to the following:

CAUTION:

There is a risk of destroying the transmission control module (Mechatronic) with static discharge.

Always discharge the static electricity. Do this by touching a grounded object, for example vehicle ground, the vehicle or the hoist.
Do not touch contacts in transmission connector with hands.

-- Make sure the connector locks and is secure.

-- Install the ATF filter. Refer to ATF FILTER .

-- Install the ATF pan. Refer to AUTOMATIC TRANSMISSION FLUID OIL PAN .

-- Fill the ATF. Refer to ATF, DRAINING OR FILLING AFTER REPAIR .