BMW X3 Quiz

Electronic components

In this manual: Electronic components
General information on preservation measures — 1Body cavity sealing — 1Body corrosion protection — 1Body repair instructions — 1Support members — 1Luggage compartment floor — 1Wheel wells — 1Side frame and door pillars — 1Roof outer skin — 1Dash cowl — 1Front trim panel — 1Rear trim panel — 1Side panels — 1Front side doors — 1Rear side doors — 1Front lid — 1Rear lid — 1Other flaps — 1Body special tools — 1General information — 1Handling brake fluids — 1Brake testing and bleeding — 1Front brakes — 1Rear brakes — 1Master brake cylinder — 1Brake lines — 1Brake booster — 1Electrical components/wear indicator — 1Parking brake — 1Mechanical/hydraulic components — 1Electronic components — 1Brakes — 1Front brake — 1Pedal mounting block — 1Brake pedal with linkage — 1Clutch pedal with linkage — 1Accelerator pedal actuation — 1Pedals — 1Specified grease — 1Propeller shaft, general — 1Propeller shaft assembly — 1Center console assembly — 1Front propeller shaft — 1Propeller shaft — 1Propeller shaft complete — 1Front axle repair instructions — 1Front axle suspension — 1Front sub-frame — 1Struts with rubber mounts — 1Wheel bearings and stub axle — 1Spring strut — 1Spring with suspension — 1Stabilizer bar — 1Front axle gearbox — 1Output shaft — 1Front axle — 1General information on high temperature multi-purpose grease — 1Rear axle repair instructions — 1Final drive with cover — 1Final drive mounting — 1Output shafts — 1Rear sub-frame — 1Control arms and struts — 1Axle mounting — 1Wheel bearings — 1Shock absorber — 1With suspension — 1Stabilizer bar — 1Rear axle — 1General information on final drive oil — 1Approved final drive oils for front and rear axle final drives with and without limited slip or viscous coupling — 1Final drive oil for bmw m1 motorsport coupe — 1Operating fluids as of 11/2015 — 1Brake pad replacement reminder — 1Emissions maintenance reminder — 1Maintenance service reminder — 1Tire pressure monitor system reminder — 1Description — 1Troubleshooting — 1Ignition wires, spark plugs — 1Ignition coil — 1Electronic switching or control units — 1Preheating relay — 1Preheater plugs — 1Alternator with drive and mounting — 1Controller — 1Starter with mounting — 1Starter lead — 1Engine wiring loom — 1Oil pressure/oil temperature/oil gauge — 1Switches and relays — 1Engine electrical system — 1Cabin air filter — 1Cabin air filter applications — 1Operating fluids - air conditioning and heating — 1Air conditioner refrigerant — 1Refrigeration oil — 1Note, overview components climate control — 1Heater with operation — 1Auxiliary. heater with control elements — 1Nozzles and outlets — 1Microfilter — 1Air conditioning, leak detection — 1Ac housing/evaporator, switching elements — 1Compressor — 1Condenser and dryer with lines — 1Heating and air conditioning — 1Front axle repair instructions — 1Front axle suspension — 1Front sub-frame — 1Struts with rubber mounts — 1Wheel bearings and stub axle — 1Spring strut — 1Spring with suspension — 1Stabilizer bar — 1Front axle gearbox — 1Front axle — 1General information on high temperature multi-purpose grease — 1Integrated suspension systems repair instructions — 1Front control and suspension elements — 1Rear control and suspension elements — 1Electrical components — 1Electronic damping force adjustment — 1Integrated suspension systems — 1Approved hydraulic fluids — 1Rear axle repair instructions — 1Final drive — 1Final drive with cover — 1Final drive mounting — 1Output shafts — 1Rear sub-frame — 1Control arms and struts — 1Axle mounting — 1Wheel bearings — 1Shock absorber — 1Springs with suspension — 1Stabilizer bar — 1Rear axle — 1General information on final drive oil — 1Approved final drive oils for front and rear axle final drives with and without limited slip or viscous coupling — 1Final drive oil for bmw m1 motorsport coupe — 1Operating fluids as of 11/2015 — 1Electronic chassis alignment — 1Mechanical steering gear — 1Steering gear with servo unit — 1Steering arms, tie rods, steer. damper — 1Steering column — 1Steering wheel — 1Steering wheel for airbag — 1Pump and oil supply — 1Steering and wheel alignment — 1Wheels — 1Disc wheels (rims) — 1Tires — 1Wheels with tires — 1Tire mounting paste — 1Engine mounting — 1Transmission suspension, automatic. transmission — 1Engine and gearbox suspension — 1Transmission in general — 1Transmission case, oil sump — 1Extension housing, bearings, seal — 1Mechanical attachments — 1Hydr/el control components/elements — 1Oil pump — 1Shift valves, parking lock — 1Torque converter — 1Automatic transmission — 1Automatic transmission fluid for zf-transmission GA8HP45Z / GA8HP50Z / GA8HP70Z / GA8HP90Z / GA8P70H / GA8P75H / GA8HP75Z — 1General information on automatic transmission fluids — 1Approved automatic transmission fluids for initial fillings and correcting fluid levels — 1Checking transmission fluid level — 1Transmission fluid change intervals (if applicable) — 1Transfer case, general — 1Transfer box — 1Transmission shafts — 1Transfer box special tools — 1Transfer box in general (atc 45l) — 1Transmission in general — 1Bearing in housing, sealing ring — 1SELF-DIAGNOSTICS DTCS — 1
~7min read

OVERVIEW OF ELECTRONIC COMPONENTS

Brakes
  • Removing and installing/renewing icm control unit
  • Removing and installing/replacing dsc control unit
  • Removing and installing/replacing emf actuator
  • Replacing a brake pad sensor (front)
  • Replacing a brake pad sensor (rear)
  • Replacing a rear pulse generator
  • Replacing one front pulse generator

Removing and installing/renewing icm control unit

IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DAMAGE (ESD protection).

WARNING: The sensor system for triggering the airbag is installed in the ICM control unit! The battery must be disconnected before removing the ICM control unit (ICM control unit de-energised)! There is a risk of the airbag being triggered inadvertently if this requirement is disregarded!

Necessary preliminary tasks

  • Disconnect negative battery cable.
  • Remove CENTER CONSOLE assy.

Make service opening (2) in carpet.

Carefully cut carpet along pre-punched line (1).

Fold back service opening (2) in direction of arrow.

Brakes

WARNING: Make sure that the negative battery lead is disconnected! There is a risk of the airbag being triggered inadvertently!

Undo nuts (1) and raise ICM control unit (2).

Disconnect plug connection and remove ICM control unit (2).

Installation note: Replace self-locking nuts.

Brakes

IMPORTANT: Do not trap any electrical wires when installing ICM control unit!

After removing and installing ICM control unit:

After completing repairs, use BMW Diagnosis and Information System to

  • carry out adjustment/start-up of ICM control unit

After replacement of the ICM control unit:

Vehicles built before 03/2012:

  • Adjust vehicle order according to conversion of ICM control unit.
  • Program/encode ICM control unit.
  • Encode ACSM.
  • Carry out ADJUSTMENT/START-UP OF ICM CONTROL UNIT .
  • Carry out RIDE HEIGHT ADJUSTMENT .

On vehicles from 03/2012:

After completing repairs, use BMW Diagnosis and Information System to

  • Program/encode ICM control unit.
  • Carry out ADJUSTMENT/START-UP OF ICM CONTROL UNIT .
  • Carry out RIDE HEIGHT ADJUSTMENT .

Removing and installing/replacing dsc control unit

IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DAMAGE (ESD protection).

IMPORTANT: Maintain conditions of absolute cleanliness.

IMPORTANT: Risk of damage to the contacts when removing and installing the hydraulic unit.

Disconnect plug connection (1).

Release screws (2) and carefully detach DSC control unit by pulling forward.

Brakes

IMPORTANT: Cleaning with compressed air, chemical solvents and sharp-edged objects is not permitted.

Do not touch or clean pressure sensor contacts with your fingers.

If necessary, clean sealing surface (1) with a plastic scraper or a fluff-free cloth.

Brakes

IMPORTANT: Do not touch, clean or readjust valve coils (1) and pressure sensor contact springs with your fingers.

Check gasket (2) for damage. If damaged, replace DSC control unit (3).

Brakes

Installation note: Make sure screws are inserted evenly and DSC control unit rests on hydraulic unit.

Replace screws.

Observe tightening sequence (1-4).

Brakes

Replacement:

  • Carry out programming/encoding
  • Function check - hydraulic unit

Removing and installing/replacing emf actuator

Necessary preliminary tasks:

  • Release parking brake.
  • Switch off ignition.

IMPORTANT: Switch off ignition at least 30 s before disconnecting the plug connection!

After installation, observe the following: switch on ignition and, using parking brake operating element, open parking brake once, close once and open again.

Disconnect plug connection (1).

Disengage cable from cable clip.

Brakes

Release screws (1).

Installation note: Replace screws

Take off holder (2).

Detach actuator drive (3) from brake caliper.

Brakes

Installation note: Check sealing ring (1), replace if necessary.

Apply a light coating of brake fluid to sealing ring (1) before fitting.

Brakes

Installation note: Carefully fit actuator drive until teeth engage and actuator drive rests flush on brake caliper.

If necessary, turn actuator drive slightly until bore hole and thread are flush.

Brakes

Replacing a brake pad sensor (front)

IMPORTANT: The brake pad wear sensor must be replaced once it has been removed (brake pad wear sensor loses its retention capability in the brake pad).

If an already ground brake pad wear sensor has to be replaced although the minimum brake pad thickness has not yet been reached, it is necessary to file down the new sliding contact with a file to the same length as the ground sliding contact.

Necessary preliminary work:

  • Remove front left WHEEL .

Unclip line from holder (1).

Open housing cover.

Disconnect plug connection (2).

Installation note: Make sure the plug connections snaps in correctly and the line is fitted correctly in the holders.

Brakes

Unclip line from holders (1).

Installation note: Ensure proper locking of the holders and proper seating of the line in the holders.

Brakes

Disengage line from brake pad wear sensor from holder (1).

Pull brake pad wear sensor (2) in direction of arrow out of brake pad.

Installation note: Make sure brake pad wear sensor (2) is correctly seated in brake pad and holder (1).

Brakes

Replacing a brake pad sensor (rear)

IMPORTANT: The brake pad wear sensor must be replaced once it has been removed (brake pad wear sensor loses its retention capability in the brake pad).

If an already ground brake pad wear sensor has to be replaced although the minimum brake pad thickness has not yet been reached, it is necessary to file down the new sliding contact with a file to the same length as the ground sliding contact.

Necessary preliminary work:

  • Remove rear right WHEEL .

Open housing cover (1).

Disconnect plug connection for pulse generator.

Unclip line from holders (2).

Installation note: Ensure proper locking of plug connector and proper seating of rubber grommets.

Brakes

Disengage line from brake pad wear sensor from holders (1).

Pull brake pad wear sensor (2) in direction of arrow out of brake pad.

Installation note: Make sure brake pad wear sensor (2) is correctly seated in brake pad and holder (1).

Brakes

Replacing a rear pulse generator

IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DAMAGE (ESD protection).

Necessary preliminary work:

  • Remove rear WHEEL .
  • Read and comply with GENERAL INFORMATION.

Open housing cover (1).

Disconnect plug connection for pulse generator.

Unclip line from holders (2).

Installation note: Ensure proper locking of plug connector and proper seating of rubber grommets.

Brakes

Release screw (1).

Withdraw wheel speed sensor (2) from bore hole.

Unclip line from holder (3).

Clean bore for pulse generator and lubricate with Staburags NBU 12/K lubricating grease.

IMPORTANT: Prior to installation, check sensor head for damage and replace if necessary.

Brakes

Replacing one front pulse generator

IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DAMAGE (ESD protection).

Necessary preliminary work:

  • Remove front WHEEL .
  • Read and comply with GENERAL INFORMATION.

Unclip line from holder (1).

Open housing cover.

Disconnect plug connection (2).

Installation note: Make sure the plug connections snaps in correctly and the line is fitted correctly in the holders.

Brakes

Unclip line from holders (1).

Installation note: Ensure proper locking of the holders and proper seating of the line in the holders.

Brakes

Release screw (1) and withdraw pulse generator (2) from bore.

Unclip line from holder (3).

Clean bore for pulse generator and lubricate with Staburags NBU 12/K lubricating grease.

IMPORTANT: Prior to installation, check sensor head for damage and replace if necessary.

Brakes

START-UP OF ICM CONTROL UNIT

NOTE: Start-up of ICM control unit must be carried out:

  • After replacement or removal and installation of ICM control unit

Connect vehicle to BMW diagnosis system.

Select and carry out start-up of ICM control unit under Service functions.

Test yourself

A quick BMW X3 quiz: every answer comes with an explanation and a link to the manual page.