MECHATRONIC, Removing And Installing: Removing
The system is under pressure.
The "7-Speed Dual Clutch Transmission" is equipped with an electronic ATF pump and a hydraulic pressure reservoir.
- The electronic ATF pump can start up at any time.
- The ATF system also remains under pressure with the ignition switched off due to the hydraulic pressure reservoir.
- The electronic ATF pump must be deactivated every time before opening the transmission, and the hydraulic pressure reservoir is drained. Refer to ATF PUMP, DEACTIVATING AND DRAINING THE HYDRAULIC PUMP RESERVOIR .
- When the system status is not clear, for example the cause of a faulty transmission control module or transmission is unknown, only loosen the mechatronic bolts to a minimal degree, so that the oil pressure in the pressure reservoir can decrease slowly.
- Release and disconnect the Transmission Control Module -J217- connector before removing the oil pan.
- Wear protective eyewear.
- Wear safety gloves.
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.
The transmission is installed.
- Noise insulations removed. Refer to NOISE INSULATION, REMOVING AND INSTALLING .
- ATF draining. Refer to ATF, DRAINING AND FILLING .
Tip:
- The test program "ATF draining" includes deactivating the ATF pump and draining the hydraulic pressure reservoir. Refer to ATF PUMP, DEACTIVATING AND DRAINING THE HYDRAULIC PUMP RESERVOIR .
-- 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 the arrow A-.
-- Remove the protective cap -arrow-.
-- Remove the transmission fluid pan. Refer to TRANSMISSION FLUID PAN, REMOVING AND INSTALLING .
-- Disconnect the connector using the Assembly Tool: T40305 .
-- Loosen the bolts in the sequence -1 to 7- a half turn.
-- Remove the bolts -2 and 5- and install the two Oil Sump Assembly Pin: T40199 in their place.
-- Remove the remaining bolts -1, 3, 4, 6 and 7-.
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.
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 .
