BMW X5: General Information On Intelligent Battery Sensor (IBS)

WARNING: Danger of destruction in event of mechanical strain

• Do not introduce any additional connections at the battery negative terminal.
• Do not modify the grounding cable.

  The grounding cable also serves to dissipate heat.

• Do not establish any connection between the IBS and the sensor screw.
• Do not use force when disconnecting the pole shoe from the battery terminal:
  • Do not pull on the grounding cable.
  • Do not place any tools under the IBS to lever off the pole shoe.
• Do not use IBS connections as levers.
• Use a torque wrench and set tightening torque in accordance with repair instructions.
• Do not release or tighten down sensor screw (screw with Torx head).
• Avoid contact between IBS and ground.

WARNING: Danger of destruction to IBS and cables when battery is replaced

• The IBS and the cables can be destroyed by mechanical strain when the battery is replaced.

  Therefore avoid mechanical strain.

• The size (capacity) of the battery required for the car is coded in the Car Access System (CAS).
• Use the battery size (capacity) installed as standard when replacing the battery.
• Register battery change via Service Function (Progman or DIS).
• Delete fault entries in the Digital Engine Electronics (DME) associated with battery replacement.
• Always proceed in accordance with the repair instructions.

NOTE: Battery draining possible in spite of the intelligent battery sensor IBS being fault-free.

• A battery can be drained (e.g. with lights or radio switched on) even when the IBS functions perfectly in conjunction with power management.
• For this reason, only replace the IBS when a corresponding fault is entered in the DME or DDE.

REPLACING BATTERY POSITIVE LEAD (FROM BATTERY TO LUGGAGE COMPARTMENT CONNECTOR)

WARNING: Observe safety instructions for handling vehicle battery.

Notes and instructions on Intelligent Battery Sensor IBS.

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

Necessary preliminary tasks:

• Remove flap in luggage compartment panel on right.
• Disconnect negative battery cable.

Disconnect plug connection (1) on safety battery terminal (2).

Open cover and release nut (3).

Tightening torque.

Open cover (2) and slacken nut underneath.

Tightening torque. Using a screwdriver, expand locking bracket (6) at lower end and clip out.

Raise distribution box slightly and remove safety battery terminal.

Fig. 13: Identifying Plug Connection, Battery Terminal And Locking Bracket

Open cover (1).

Slacken nut (2).

Tightening torque. Disconnect battery positive lead.

Fig. 14: Identifying Cover

REPLACING BATTERY NEGATIVE LEAD.

WARNING: Observe safety instructions for handling vehicle battery.

Follow instructions for disconnecting and connecting battery.

IMPORTANT: Do not under any circumstances use force to pull/lever off Intelligent Battery Sensor (IBS).

Necessary preliminary tasks:

• Raise luggage compartment floor trim

Release screws (1).

Remove battery cover (2) upwards.

Fig. 15: Identifying Battery Cover

Loosen nut (1).

Tightening torque.

Remove battery negative lead with IBS.

Disconnect plug connection (2).

Unscrew nut (3).

Tightening torque.

Fig. 16: Identifying Plug Connection

REPLACING WIRING HARNESS FOR FRONT BUMPER

Necessary preliminary tasks:

• Remove front bumper trim.

Disconnect plug connections (1) on ultrasonic transducer.

Unclip wiring harness (2) from bumper trim.

Installation:

Make sure wiring harness (2) is laid correctly.

Fig. 17: Identifying Plug Connections And Wiring Harness

REPLACING WIRING HARNESS FOR REAR BUMPER

Necessary preliminary tasks:

• Remove rear bumper trim.

Disconnect plug connections (1) on ultrasonic transducer.

Unclip wiring harness from bumper trim and remove.

Installation:

Make sure wiring harness is correctly laid.

Fig. 18: Identifying Plug Connections On Ultrasonic Transducer

REPLACING WIRING HARNESS IN LEFT OR RIGHT FRONT DOOR

Necessary preliminary tasks:

• Close front side window completely.
• Remove front door trim.
• Remove front acoustic insulation.

Unlock plug connections (1) and disconnect.

Unclip door wiring harness at points (2).

Installation:

Make sure door wiring harness is correctly laid.

Fig. 19: Identifying Plug Connections

NOTE: Front side panel shown removed for purposes of clarity.

Feed out door wiring harness towards front to A-pillar and remove.

Fig. 20: Pulling Rubber Grommet Out Of Front Door

REPLACING WIRING HARNESS IN LEFT OR RIGHT REAR DOOR

Necessary preliminary tasks:

• Close rear side window completely.
• Remove rear door trim panel.
• Remove rear acoustic insulation.

Unfasten plug connection (1) and disconnect.

Unclip door wiring harness at points (2).

Installation:

Make sure door wiring harness is correctly laid.

Fig. 21: Identifying Plug Connection

Release screw (1), fold door wiring harness plug on B-pillar (2) downwards slightly and remove.

Unlock plug connection behind and disconnect.

Pull rubber grommet (3) out of rear door.

Feed out door wiring harness towards front to B-pillar and remove.

Fig. 22: Pulling Rubber Grommet Out Of Rear Door

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