MECHATRONIC, Removing And Installing: Removing

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CAUTION:

The system is under pressure.

Deactivate the ATF pump and drain the hydraulic pressure reservoir before removal.

-- Using the Vehicle Diagnostic Tester in the Transmission Control Module -J217- empty the ATF pressure reservoir and disable the Transmission Fluid Auxiliary Hydraulic Pump -V552-. Refer to ATF PUMP, DEACTIVATING AND DRAINING THE HYDRAULIC PUMP RESERVOIR .

CAUTION:

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

Always discharge "static electricity" before working with connectors or the Mechatronic. Do this by touching a grounded object, for example vehicle ground, the heater or the hoist.
Do not touch connector terminals in the transmission connector with hands.

Transmission Installed

-- Remove the noise insulations. Refer to NOISE INSULATION, REMOVING AND INSTALLING .

-- Drain the ATF. Refer to the appropriate service information. .

-- Turn off the ignition and remove the key.

-- Disconnect the connector -1- by pressing the locking mechanism -B arrow- and pull the locking bracket -2- in the direction of -arrow A-.

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-- Remove the protective cap -arrow-.

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-- Remove the transmission fluid pan. Refer to TRANSMISSION FLUID PAN, REMOVING AND INSTALLING .

-- Disconnect the connector using the Assembly Tool: T40305 .

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CAUTION:

The system is under pressure.

Deactivate the ATF pump and drain the hydraulic pressure reservoir before removal.

Fig 1: Mechatronic Bolts Loosening Sequence

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-- Loosen the bolts in the sequence -1 to 7- a half turn.

-- Remove the bolts -2 and 5- and install the two : T40199 in their place.

-- Remove the remaining bolts -1, 3, 4, 6 and 7-.

CAUTION:

Risk of causing damage to the Mechatronic.

- Only bolts -1 through 7- may be loosened.

- If other bolts are loosened, this may impair the function of the Mechatronic unit or it may come apart.

Tip:

The Mechatronic fits partially inside the transmission.
If the Mechatronic must be removed, then a second technician will be needed to keep it from falling. Another alternative, the bolts -1 and 2- can be installed slightly to hold the Mechatronic in place while it is being removed.

-- Remove the Mechatronic.

CAUTION:

Risk of causing damage to the Mechatronic.

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

- A clean work environment is required for working on the Mechatronic.

Place the removed Mechatronic on a clean surface and cover it. Use foil or lint-free cloths.

-- Seal off the ATF channels with the Cover: T40322/1-4 .

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