BMW 7 Series: Release Transmission Lock Electronically

For various tasks, it is necessary to unlock and lock the parking lock.

Before unlocking the parking lock, secure the vehicle against rolling away.

• Emergency release is only possible if the engine does not start and the starter turns over.
• If an emergency release needs to be performed although the engine starts, pull out the fuse of the electrical fuel pump.
• Emergency release is active for 15 min.
• As soon as a wheel speed signal is recorded, this time increases by 15 min.
• After this period, the parking lock is engaged without a message.
• The time specification depends on the battery capacity.
• Only specially trained service personnel are permitted to operate both the mechanical as well as the electrical emergency transmission release system.
• The vehicle must be raised and the underbody panelling removed in order to operate the mechanical emergency transmission release.

IMPORTANT: To operate the electronic emergency transmission release the vehicle must not be towed but rather only pushed.

In the case of misuse, a corresponding fault code is stored in the fault code memory.

Release transmission lock electronically

• Switch the ignition on.
• Press on brake pedal and keep depressed throughout the procedure.
• Press START-STOP button.
• As soon as the starter can be heard to operate (this may take several seconds on diesel engines or at low temperatures).
• Press and hold release button (1).

Fig. 74: Identifying Transmission Release Button

1. The specified time must be adhere to!

2. Push gear selector switch (2) forward up to pressure point and hold for two seconds.

3. Release gear selector switch and move one step forward briefly.

Fig. 75: Identifying Gear Selector Switch

• Gear position N is shown in the instrument cluster.
• The parking lock is now electronically unlocked.
• After the parking lock is successfully unlocked, release the brake pedal.
• Leave the ignition switched on in order to subsequently move the vehicle.
• The transmission automatically shifts into P when the ignition is turned off.

Fig. 76: Identifying Gear Position

IMPORTANT: After the start-stop button is pressed again, the parking lock is activated without a message.

Allow the starter to cool down for approx. 10 minutes after unsuccessful attempts.

REPLACING O-RING ON OIL PUMP (GA6HP19/GA6HP26Z)

Notes

IMPORTANT: After completion of work, check TRANSMISSION OIL LEVEL.

Failure to comply with this instruction will result in serious damage to the transmission.

Necessary preliminary tasks

• Remove AUTOMATIC TRANSMISSION
• Secure transmission with TRANSMISSION RETAINING BRIDGE on assembly stand
• Remove TORQUE CONVERTER
• Remove MECHATRONICS

Remove adapter (1).

Installation: Note installation position.

Fig. 77: Identifying Adapter

Release screws.

Tightening torque 24 31 2AZ.

Fig. 78: Identifying Torque Converter Screws

Slide special tool 24 1 184 completely into puller 24 1 180.

Fig. 79: Sliding Special Tool 24 1 184 Completely Into Puller 24 1 180

Attach special tool 24 1 180 and secure with screw (1).

Insert screw (2) and release oil supply unit from transmission housing.

Fig. 80: Connecting Special Tool 24 1 180 With Screw

Release screws.

Tightening torque 24 31 1AZ.

Fig. 81: Identifying Transmission Housing Screws

Detach cover (1) from pump body (2).

Replace O-rings (3 + 4).

Installation: Pay attention to installation position of gears during disassembly.

Fig. 82: Identifying Installation Position Of Gears

REPLACING MECHATRONICS (GA6HP26Z TU)

Notes

NOTE: After completing work:

• Load specific data version with DIS

IMPORTANT: After completion of work, CHECK TRANSMISSION OIL LEVEL.

Failure to comply with this requirement will result in serious damage to the automatic transmission!

IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DISCHARGE (ESD PROTECTION).

Necessary preliminary tasks

• Remove underbody protection at front and rear.
• Remove exhaust system bracket

Remove plates (2).

Fig. 83: Identifying Underbody Plates

Unfasten nut.

Disconnect cable (1).

Installation:

Adjusting cable:

• Release nut
• Adjust cable by means of holder (2) until spacing A = 1 mm is obtained.
• Tighten down nut

Fig. 84: Locating Cable Nut

Secure lever (1) with a cable tie (2) or wire in vertical position.

Fig. 85: Identifying Lever With Cable Tie

IMPORTANT: Mechatronics can be destroyed by static discharges. Therefore the contacts inside the plug must not be touched. Insert special tool immediately after work step.

Unscrew plug (1) and disconnect.

Fig. 86: Disconnecting Plug

Insert special tool 24 2 390 in sealing sleeve (1).

Fig. 87: Inserting Sealing Sleeve Using Special Tool 24 2 390

Remove TRANSMISSION OIL SUMP.

Unlock sealing sleeve with slide (1).

Fig. 88: Unlocking Sealing Sleeve With Slide

Note position of sealing sleeve.

Pull out sealing sleeve (1).

Installation: Screw in sealing sleeve partially (lug in upper area). Turn until lug engages in groove of transmission. Slide in sealing sleeve.

Lug on sealing sleeve must not be damaged!

Fig. 89: Pulling Out Sealing Sleeve

NOTE: GA6HP26Z TU

Release all screws (1 and 2).

1. M6 x 59 mm
2. M6 x 20 mm

Remove mechatronics.

Fig. 90: Identifying Mechatronics Screws

Installation: Check gaskets (1 and 2) for damage, replace gaskets if necessary.

Coat new seals with automatic transmission fluid and install.

Fig. 91: Identifying Gaskets

Installation: Insert screws (3) alternately until contact is made with each screw head.

Insert all further screws contact is made with each screw head.

Fig. 92: Identifying Screw Head Screws

NOTE: GA6HP26Z TU

IMPORTANT: Tighten down screws in order 1...13.

Failure to comply with this requirement will result in serious damage to the automatic transmission! Tightening torque 24 30 1AZ.

Fig. 93: Identifying Screw Head Screws

REPLACING SEALING SLEEVE FOR TRANSMISSION HOUSING (GA6HP26Z)

Notes

IMPORTANT: After completion of work, check TRANSMISSION OIL LEVEL.

Failure to comply with this requirement will result in serious damage to the automatic transmission!

Necessary preliminary tasks

• Remove rear UNDERBODY PROTECTION
• Remove TRANSMISSION OIL SUMP
• Remove TRANSMISSION CROSSMEMBER.

IMPORTANT: Support transmission with workshop hoist.

Unlock and disconnect plug (1) by turning.

Fig. 94: Turning Plug

Insert special tool 24 2 390 in sealing sleeve (1).

Fig. 95: Inserting Sealing Sleeve Using Special Tool 24 2 390

Unlock sealing sleeve with slide (1).

Fig. 96: Unlocking Sealing Sleeve With Slide

NOTE: Note position of sealing sleeve.

Pull out sealing sleeve (1).

Installation: Screw in sealing sleeve partially (lug in upper area). Turn until lug engages in groove of transmission. Slide in sealing sleeve.

Lug on sealing sleeve must not be damaged!

Fig. 97: Pulling Out Sealing Sleeve

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