BMW 7 Series: Battery/Vapor Separator

CARRYING OUT BATTERY "POWER RESET"

IMPORTANT: Observe SAFETY INSTRUCTIONS FOR HANDLING VEHICLE BATTERY.

The following steps must be carried out for a "power reset"

• Switch off and disconnect battery charger
• Turn off ignition
  Vehicles with ID transmitter:
  Remove identification sensor from slot
  Vehicles with comfort access system: Make sure terminal is in 0 position
• Disconnect battery negative terminal
• Reconnect battery negative terminal (to ensure bus activity)
• Waiting time (5- -10 seconds)
• Disconnect battery negative terminal
• Waiting time (1 minute)
• Connect battery negative terminal and tighten, tightening torque 61 21 1AZ
• Connect and switch on battery charger
• Switch on ignition.

CHARGE BATTERY

WARNING: Read and comply with SAFETY INSTRUCTIONS pertaining to vehicle battery.

IMPORTANT: To prevent the intelligent battery sensor from malfunctioning, use the charging points in the engine compartment.

NOTE: Use BMW-recommended charging computers* to charge the battery.

*Sourcing reference BMW Workshop Equipment Catalogue

REMOVE AND INSTALL OR REPLACE BATTERY

WARNING: Observe SAFETY INFORMATION for handling the battery.

To ensure the correct safety and convenience functions, install only the original battery (battery size and type) stored in the vehicle order. OBSERVE NOTE ON BATTERY REPLACEMENT.

Necessary preliminary work

• Remove POWER DISTRIBUTION BOX

Fold back cover (1) as shown.

Slacken nut (2).

Tightening torque 61 21 1AZ.

IMPORTANT: Do not under any circumstances pull/lever safety battery terminal off by force.

Detach safety battery terminal towards top, lay to one side and secure.

Fig. 192: Identifying Battery Back Cover And Nut

Release screw (1) and remove holder (2).

Tightening torque 61 21 5AZ.

Detach vent hose from battery.

Pull out battery.

Installation note: Make sure battery is correctly seated in mounting.

Fig. 193: Identifying Battery Screw And Holder

Replacement:

1. In vehicles with IBS (intelligent battery sensor)

REGISTER battery replacement.

2. Read out fault memory, clear if necessary.

NOTE:

• Check Control message disappears when fault memory is cleared. This requires that the registration is performed first.

TESTING BATTERY WITH BATTERY TESTER

WARNING: Read and comply with SAFETY INFORMATION pertaining to vehicle battery.

Necessary preliminary work

Remove LUGGAGE COMPARTMENT FLOOR TRIM PANEL.

NOTE: Use BMW-recommended battery tester* to test the battery.

*Sourcing reference BMW Workshop Equipment Catalogue

Procedure:

• Turn off ignition and close doors
• Connect battery tester directly to battery terminals
• Select Battery test and confirm
• Enter vehicle identification number
• Enter battery data
• Carry out battery test

Fig. 194: Identifying BMW-Recommended Battery Tester

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