BMW 7 Series (F01/F02) 2008-2015 Service Manual / Engine Electrical System / Troubleshooting / Instructions For Disconnecting And Connecting Battery

BMW 7 Series: 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 ignition is not turned off when the battery is disconnected, fault memories may be set in some control units.

IMPORTANT:

There is a danger of mixing up battery leads: If the battery positive and negative leads are the same color and you are in doubt, follow the polarity to the battery, then mark and cover the leads.
The on-board computer and clock may lose your data.

General notes on disconnecting battery

Do not disconnect battery leads and leads from alternator and starter motor while engine is running.
Cars with IBS on battery negative terminal:
Do not under any circumstances pull/lever off pole shoes by force.
Do not under any circumstances release socket-head cap screw of IBS.
Disconnect terminal of BATTERY NEGATIVE LEAD from vehicle battery. Cover battery negative terminal(s) and secure.
When work is carried out on the electrical system, faults may be caused in the fault memories of some control units when the battery is connected.
When installing battery terminal: Tightening torque 61 21 1AZ.

After connecting battery

IMPORTANT: The scope of application of some systems may be restricted after a power supply interruption.

Likewise, individual settings may be lost.

Settings or activations must be carried out, depending on the equipment specification.

For example:

If necessary, carry out ADJUSTMENT OF ACTIVE STEERING
If necessary, activate SLIDE/TILT SUNROOF
If necessary, activate power windows. See NOTES ON INITIALIZING POWER WINDOW REGULATOR.

Refer to the diagnosis system for further vehicle-specific information.

INSTRUCTIONS FOR OPENING CONTACTS AND LOCKS OF DIFFERENT PLUG CONTACT SYSTEMS

Notes

ABBREVIATIONS REFERENCE CHART

Troubleshooting

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

Ultrasonically welded plugs (1) must be replaced completely.

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

Troubleshooting
Fig. 11: Identifying Ultrasonic-Welded Connectors And Welds

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

Release and pressing-off tool61 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
SOCKET HOUSING (RADIO CONNECTOR), 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

INSTRUCTIONS FOR WORKING ON THE IGNITION SYSTEM

CAUTION: Always switch off ignition before working on ignition system.

Use only test leads which have been approved and belong to these testing instruments (e.g. DIS Tester).

Comply with operating instructions of the respective testing instrument used.

Comply with the country-specific safety regulations.

Never touch components under current with engine running! Comply with instructions of DIS tester.

Do not connect any suppression capacitors or inspection lamps to terminal 1 on the ignition coil.

Terminal 1 of ignition coil must not be connected to ground or battery positive lead.

If an alarm system is subsequently installed, lead of terminal 1 must not be used for start prevention.

When working on ignition system, always disconnect supply leads to ignition coils.

High tension! - High tension!

IMPORTANT: Hazardous voltages occur at:

Ignition lead
spark-plug connectors
spark plugs
Ignition coil (high voltage at terminal 4 is approx. 40 kV)
Lead of terminal 1 from ignition coil to DME control unit (high voltage approx. 350 V)

SEE MORE:

Comfort Access- Convenient closing

Safety information Warning With convenient closing, body parts can be jammed. There is a risk of injury. Make sure that the area of movement of the doors is clear during convenient closing. Closing Touch the grooved surface on the handle of a closed vehicle door with your finger and hold it there w

Introduction

Active Blind Spot Detection is a new BMW system. It is being introduced for the first time in the F01/F02 7 Series. The system is designed to assist the driver in making lane change maneuvers by monitoring traffic at the rear and sides of the vehicle. Using two radar sensors it detects vehicles t

BMW 7 Series: Instructions For Disconnecting And Connecting Battery

READ NEXT:

Notes On Checking Ignition System

Notes/Information On Removing And Installing Control Units

Safety Information For Working On Vehicles With Automatic Engine Start-Stop Function (MSA)

SEE MORE:

Comfort Access- Convenient closing

Introduction