BMW 7 Series: General Information On Intelligent Battery Sensor (IBS)

NOTE: Do not connect the charger to the 12 V charging socket.

The 12 V charging socket is supplied with voltage by the rear power distribution box via relay. This relay drops out after terminal 15 OFF. This means that a trickle charger connected at the 12 V charging socket will be disconnected from the battery. Only charge the battery via the jump start terminal point. Only then can the power supply be registered by the vehicle.

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 replacement via Service functions in diagnosis system.
• 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 entry in the DME or DDE.

INSTRUCTIONS FOR OPENING CONTACTS AND LOCKS OF DIFFERENT PLUG CONTACT SYSTEMS

Notes

SPECIAL TOOLS DESCRIPTION CHART

IMPORTANT: The contacts can be changed on ultrasonically welded plugs (1).

Ultrasonic-welded connectors (1) can be identified by the welds (2) on their longitudinal side.

Fig. 23: Identifying Ultrasonic-Welded Connectors With Welds

NOTE: Special tools referred to in the repair instructions below are contained in the following special tool kits:

• Release and pressing-off tool 61 1 150
  will be replaced on 09/2005 by 61 0 300 (BMW) and 61 0 400 (MINI)
• Release and pressing-off tool 61 1 100 (engine)

Repair instructions for opening plug housings and removing contacts of different plug systems

Plug system D 1.5/D 2.5

• CIRCULAR PLUGS, 7-, 8-PIN, SYSTEM D 2.5
• CIRCULAR CONNECTOR, 13-PIN, SYSTEM D2.5
• CIRCULAR CONNECTOR, 20-PIN, SYSTEM D2.5
• CIRCULAR CONNECTORS, 4-, 7-, 10- 12-, 25-PIN, SYSTEM D1.5/D2.5
• INLINE CONNECTORS, 15-PIN, SYSTEM D2.5
• INLINE PLUGS, 8-, 12-PIN, SYSTEM D2.5
• IN-LINE CONNECTORS, 30-PIN, SYSTEM D2.5
• IN-LINE PLUGS, 20-PIN, SYSTEM D2.5

Plug system JPT/MDK/DFK

• IN-LINE PLUGS, 2-PIN, SYSTEM JPT ELA
• IN-LINE CONNECTORS, 2-PIN, SYSTEM MDK 3PLUS 2.8
• IN-LINE PLUGS, 4-PIN, SYSTEM DFK ELA

Plug system Elo/Elo Power

• INLINE PLUGS, 4-, 10-PIN, SYSTEM ELO
• IN-LINE PLUGS, 6- TO 50-PIN, SYSTEM ELO
• IN-LINE CONNECTORS, 3-, 6-PIN, SYSTEM ELO-POWER 2.8

Plug system LSK

• CONNECTOR HOUSING, LCC CONTACT (LOAD CURRENT CONTACT)

Plug system MQS/MPQ

• INLINE CONNECTORS, 6-, 8-PIN, SYSTEM MQS
• INLINE PLUGS, 2-PIN, SYSTEM MPQ 2.8
• CONTROL UNIT CONNECTORS, 25-, 35-, 55-, 83-, 88-PIN
• IN-LINE PLUGS, 24-PIN, HYBRID SYSTEM MQS/MPQ
• SOCKET HOUSING 42-, 43-PIN, HYBRID SYSTEM MQS/MPQ
• SOCKET HOUSINGS, 2X21-, 2X27-PIN, HYBRID SYSTEMS MQS/MPQ, ELO/ELO POWER
• IN-LINE CONNECTORS, 30-PIN, HYBRID SYSTEM MQS/MPQ
• SOCKET HOUSINGS, 5-PIN, 8-PIN, SYSTEM MQS/MPQ
• SOCKET HOUSING (RADIO CONNECTOR), HYBRID SYSTEM MQS/MPQ

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