BMW X5: Control Unit Box
REPLACING FAN FOR ELECTRONICS BOX
NOTE: Follow instructions for removing and installing electronic control units.
- Remove control unit.
- Read fault memory. Switch off ignition.
Unclip plug (1).
Remove DDE control unit (3).
Remove relay plug-in (5) towards top.
Release screws (4).
Lift out device carrier (2).
Unfasten plug connection and disconnect.
Release air cowl (1).
Remove electric fan (2) with bracket.
Add final details to vehicle.
Read fault memory.
Additional Fault Notes For Troubleshooting
Necessary preliminary tasks:
- Connect diagnosis system
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Fig. 79: Identifying DIS
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Contents Of Engine Electrical System General
General Information
Working on ignition system
Removing and installing electronic control units
Welding work (overload protection of control units)
Disconnecting and connecting battery
Disconnec
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Distribution Box, Power
REPLACING DISTRIBUTION BOX (LUGGAGE COMPARTMENT)
WARNING: Observe safety instructions for handling vehicle battery.
Necessary preliminary tasks:
Disconnect battery negative lead.
Remove flap in luggage compartment panel on right.
Release expansion rivet (1).
Remove insulating mat (2).
Fig. 143
Fuel Pick-Up, Cleaning
GENERAL FUNCTION DESCRIPTION FOR FUEL SUPPLY SYSTEMS
Fuel supply systems, spark-ignition engines
Fuel system
The electric fuel pump in the fuel tank generates the pressure in the fuel
system which is set by the pressure
regulator to a specific level.
Tank venting system
The tank venting system is a
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