BMW 7 Series: Replacing Battery Negative Lead
WARNING: Observe (SAFETY) INFORMATION ON AGM BATTERY and follow INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY.
Read and comply with notes and instructions on INTELLIGENT BATTERY SENSOR.
Necessary preliminary tasks
- Clamp off BATTERY NEGATIVE LEAD
- Remove LUGGAGE COMPARTMENT STORAGE COMPARTMENT
Slacken nut (1) on negative battery terminal.
Tightening torque 61 21 1AZ.
IMPORTANT: Do not under any circumstances use force to pull off negative terminal.
Detach battery negative lead with intelligent battery sensor (IBS) in upward direction, lay to one side and secure.
Disconnect plug connection (2).
Release nut (3) and battery negative lead (4).
Tightening torque 61 21 6AZ.
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Fig. 24: Identifying Battery With Nut, Plug Connection And Negative Lead
REPLACING POSITIVE BATTERY CABLE (FROM BATTERY TO LUGGAGE COMPARTMENT CABLE CONNECTOR)
WARNING: Observe SAFETY INSTRUCTIONS for handling vehicle battery.
Necessary preliminary work
- Clamp off BATTERY NEGATIVE LEAD
If necessary, unlock and disconnect plug connection (1) of safety battery terminal lead.
IMPORTANT: Do not under any circumstances pull/lever off safety battery terminal (1) by force.
Loosen nut (2).
Tightening torque 61 21 1AZ.
Unscrew nut (3).
Tightening torque 61 21 2AZ.
Slacken nut (4).
Tightening torque 61 21 4AZ.
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Fig. 25: Raising Power Distribution Box
Unclip locking brackets from power distribution box (5) in direction of arrow.
Raise power distribution box (5) in direction of arrow and remove positive battery cable (6).
REPLACING WIRING HARNESS FOR FRONT BUMPER
IMPORTANT: Read and comply with notes on HANDLING WIRING HARNESSES and cables.
Necessary preliminary tasks
- Remove FRONT BUMPER TRIM.
Disconnect plug connections (1) on five ultrasonic transducers.
Unclip wiring harness (2) from bumper trim.
Remove wiring harness (2).
Remove PDC.
Installation: Make sure wiring harness (2) is laid correctly.
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Fig. 26: Identifying Ultrasonic Transducer Plug Connections And Wiring
Harness
READ NEXT:
Replacing Wiring Harness In Left Or Right Front Door
IMPORTANT: Read and comply with notes on HANDLING WIRING HARNESSES and
cables.
Necessary preliminary work
Close front side window completely
Disconnect BATTERY CABLE
Remove SOUND INSULATION IN FR
Butt Connector For Repairing A Plug Connection
Notes
IMPORTANT:
1. Identify cause of damage (e.g. sharp-edged body parts, faulty
electrical
loads, jammed mechanisms, corrosion caused by ingress of water, etc.).
2. Read out fault memory.
3. Elim
SEE MORE:
Front head restraints
General information
The current head restraint position can be stored
using the memory function.
Safety information
Warning
A missing protective effect due to removed or
not correctly adjusted head restraints can
cause injuries in the head and neck area. There
is a risk of injury.
Before driving,
System Overview
The Telematics Control Unit (TCU) and the interface box 'High' (ULF-SBX-H)
control units are connected to
the MOST bus. TCU and interface box 'High' may both be fitted in the vehicle for
certain equipment options. In
this case, the telephone function is always implemented in the TCU.
The head uni
