12 36 014 Removing and refitting/replacing electric motor ECU

WARNING: This page does not describe the selected car, but rather 50 other vehicles, including the 2016 BMW M5, 2016 BMW ActiveHybrid 5, 2016 BMW 550i xDrive, 2016 BMW 550i, and 2016 BMW 535i xDrive. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: High-voltage system - danger to life!
The following points must be strictly observed prior to starting work:

DE-ENERGIZE THE HIGH-VOLTAGE SYSTEM
Observe SAFETY INFORMATION for working with hybrid cars.
OBSERVE NOTES CONCERNING EARTH BONDING SCREW CONNECTIONS

Necessary preliminary tasks:

CLAMP OFF BATTERY LEAD FROM NEGATIVE TERMINAL
NOTE: Before disconnecting the battery cable, it must be ensured that the vehicle goes to sleep. Observe a waiting period of at least 2 minutes.
Remove REAR LEFT UNDERBODY PROTECTION
Open sealing cap of coolant expansion tank (high-voltage cooling circuit)

Fig 1: Overview Of Connections On Electric Motor
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Fig 2: Identifying High-Voltage Cables, Coolant Hose, Protective Plate And Ventilation Duct

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Detach high-voltage cables (1) from protective plate (2).

Detach positive battery cable (3) from protective plate (2).

Unscrew nuts (4).

Tightening torque 12 36 1AZ .

Release screws (5).

Tightening torque 12 36 1AZ .

Unclip coolant hose (6) from holder.

Feed out protective plate (2).

Installation note:

Make sure ventilation duct (7) is correctly seated. Do not pinch ventilation duct (7).

Coolant emerges when coolant lines are detached.

Catch and dispose of escaping coolant.

Observe country-specific waste disposal regulations.

IMPORTANT: Have a container ready to catch the coolant.

Release and disconnect coolant hoses (1).

Unlock and disconnect high-voltage plug connection (2).

Unfasten plug connection (3) and disconnect.

IMPORTANT: Observe NOTES ON PLUG CONNECTIONS on hybrid cars.

Fig 3: Identifying Coolant Hoses, Plug Connection And Vent Hose

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Unlock and detach vent hose (4).

Unlock and disconnect high-voltage interlock loop (1).

Release screws (2) from high-voltage plug connection (3).

Tightening torque 12 36 2AZ .

Detach high-voltage plug connection (2) from EME (3).

Fig 4: Identifying Plug Connection, Screws And Interlock Loop

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Release nut (1) from grounding cable EME (2) on body.

Pull off grounding cable EME (2) from threaded bolt.

Tightening torque 12 36 3AZ .

Fig 5: Identifying Grounding Cable EME And Nut

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Fig 6: Identifying High-Voltage Cables, Plug Connection, Grounding Cable And Nut

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Unlock and disconnect high-voltage interlock loop (1).

Unclip high-voltage cables (2) from EME.

Unlock and disconnect high-voltage plug connection (3).

IMPORTANT: Observe NOTES ON PLUG CONNECTIONS on hybrid cars.

Unlock cover (4) at marked points and fold down.

NOTE: If replacing, modify cover (4).

Release nut (5) from equipotential bonding line.

IMPORTANT: Observe notes on EARTH BONDING SCREW connections!

Tightening torque 12 36 4AZ .

Release nut (6) from 12 V grounding cable.

IMPORTANT: Observe notes on EARTH BONDING SCREW connections!

Tightening torque 12 36 6AZ .

Release nut (7) from positive battery cable.

Tightening torque 12 36 5AZ .

Unclip 12 V grounding cable (8) from EME.

Installation note:

Make sure contact surfaces are clean.

Detach positive battery cable (1) at EME (2).

Fig 7: Identifying Positive Battery Cable At EME

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IMPORTANT: Secure EME (1) against falling out.
Check for escaping coolant remnants.
Release screw (2) from EME (1).
Tightening torque 12 36 7AZ .
Undo the nuts (3) from the EME (1).
Tightening torque 12 36 7AZ .
Carefully remove EME (1) toward the bottom with an assistant.

Fig 8: Identifying EME And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

After installation:

Fill and BLEED cooling system.

Replacement:

Carry out VEHICLE PROGRAMMING/CODING .

Connect BMW diagnosis system:

Service functions
Power train
Hybrid car
Electrical machine electronics
Motor position sensor adjustment

Fit EME grounding cable (1) to new EME (2).

Release screw (3).

Tightening torque 12 36 8AZ .

Installation note:

Make sure contact surfaces are clean.

Fig 9: Identifying EME Grounding Cable And Screw

Courtesy of BMW OF NORTH AMERICA, INC.