Disconnecting High-Voltage System

WARNING: High-voltage system. Observe safety information for handling with hybrid cars. See SAFETY INFORMATION .

WARNING: The following points must be strictly observed prior to starting work.

Remove service flap (1) from luggage compartment trim panel on the right. See Fig 1.

Fig 1: Identifying Luggage Compartment Right Trim Panel

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IMPORTANT: High-voltage safety connector can not be fully disconnected.

Unlock connector for high-voltage safety connector (1) and pull it out until bore holes (2) on connector and bushing are fully exposed. Labelling "OFF" can be read on connector of high-voltage safety connector. See Fig 2.

Fig 2: Locating High-Voltage Safety Connector

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Secure high-voltage system against being switched back on. Insert and lock shackle lock (1) in exposed bore hole (2) of high-voltage safety connector (2) . See Fig 3.

Fig 3: Securing Service Disconnect

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Determine voltage free status.
NOTE: With the ignition off and the high-voltage safety connector disconnected, the Check Control message "Hybrid system faulty" is displayed as standard. Zero voltage (high voltage system deactivated) is only displayed with the ignition on. See Fig 4.
WARNING:
Mandatory steps prior to carrying out further repair work:
- Activate ignition and check that there is zero voltage in the instrument cluster. Check Control message "High voltage system deactivated" must be displayed.
- Pay attention to active high-voltage warnings (indicator light, check control, etc.), determine cause and correct problem

Fig 4: Locating "High Voltage System Deactivated" Message (German Message Showm)

Courtesy of BMW

WARNING: Danger to life! If it cannot be established beyond doubt that the instrument cluster is de-energised, work is not permitted to begin. Before work begins, a qualified, certified electrician must verify that the system has been disconnected from the power supply (1000V AC) using appropriate measuring devices and procedures.