BMW 7 Series: Battery Replacement Information
A vehicle battery is constructed for the installation location and the individual power requirements of the particular vehicle. These individual power requirements depend on the motorization and different types of equipment. The individually assigned vehicle battery is the ideal compromise between the power requirements of the vehicle electrical system and the weight and service life of the vehicle battery.
Vehicles with the automatic engine start-stop function or particular engine types and optional equipment are equipped with a special vehicle battery (AGM battery), since only this battery type can provide elevated power requirements over the extended service life. Installing a different vehicle battery can cause problems with vehicle electronics, can reduce functions or can cause leakage of battery acid.
In the event of an accident where the airbags are deployed in vehicles with a vehicle battery in the luggage compartment, the electrical connection between the vehicle battery and the trigger is automatically disconnected through pyrotechnics. This prevents a possible short circuit.
Proper operation of all of these safety and convenience functions requires a battery that conforms with specifications and that is properly registered in vehicles with energy management systems (IBS, power module).
Vehicles with energy management systems (IBS, power module): Register battery replacement
The vehicle electrical system is informed about the vehicle battery characteristic data, such as type, size, age and current power capacity. Therefore, there will always be only one work scope provided that is permitted by the current status of information.
If the performance readiness drops below a defined minimum, a Check Control message will be generated to advise the driver that the battery must be replaced.
When installing a new vehicle battery, the battery must be registered and thus must also be registered with the vehicle electrical system.
NOTE: Only this registration/logon will ensure that the corresponding Check Control message will go out again.
system:
Register battery replacement
- Service functions
- Body
- Voltage supply
- Register battery replacement
- Test plan
When retrofitting, a more powerful battery may be used. Standard batteries may always be replaced by AGM batteries with the same specifications.
When installing a battery of a different size or a different battery type, this change in vehicle data must be programmed into the vehicle data in accordance with specifications.
Programming system:
- Battery retrofitting
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Butt Connector For Repairing A Plug Connection
Notes
IMPORTANT:
Identify cause of damage (e.g. sharp-edged body parts, faulty
electrical
loads, jammed mechanisms, corrosion caused by ingress of water, etc.).
Read out fault memory
Eliminate
Instructions For Disconnecting And Connecting Battery
Observe SAFETY INSTRUCTIONS FOR HANDLING VEHICLE BATTERY.
Before disconnecting battery
Turn off the ignition and other electrical loads/consumers to prevent
sparking when reconnecting.
NOTE: If the i
Notes On Checking Ignition System
Troubleshooting
Fault in fuel injection system
Spark plug faults
Ignition coil faults
Further fault patterns with evaluation
Additional fault notes for troubleshooting
Oscillograms
Normal osc
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Pedals
Pedal Mounting Block
Removing And Installing (Replacing) Complete Bearing Support For
Foot Pedal
IMPORTANT: After completion of work, carry out function check.
Necessary preliminary work
Remove BRAKE SERVO
Release screws (1).
Remove control units from holder (2). Plugs remain connected.
Fig. 1:
Output Shaft
NOTES ON REMOVING AND INSTALLING LOW PROFILE BAND CLAMPS
Notes
IMPORTANT: During removal Low Profile band clamp (dotted line) is
overstretched and must
not be reused!
Fig. 82: Identifying Low Profile Band Clamp (Dotted Line)
Removing
Place special tool 31 5 200 on tabs (1, 2).
NOTE: Make sure that
