BMW X3 (F25) Service & Repair Manual: Auxiliary. heater with control elements

BMW X3 (F25) Service & Repair Manual / HVAC / Auxiliary. heater with control elements

Initializing telestart hand-held transmitter

NOTE: The Telestart hand-held transmitter must be initialized when:

  • Hand-held transmitter is replaced
  • Car Access System control unit is replaced

The auxiliary heater is switched on with the hand-held transmitter and at a preselected switch-on time under an ambient temperature of approx. 15 ºC.

Heating can be activated directly in the Central Information Display at any ambient temperature. To do so, go to the parking function menu under direct operation and mark the auxiliary heating box.

NOTE: Initialization can only be carried out with the BMW diagnosis system.

Follow instructions and specifications in procedure.

Service functions:

  • Complete vehicle
  • Body
  • Air conditioning function
  • Telestart transmitter
  • Initialization

Removing and installing or replacing complete independent heater with bracket

WARNING: Risk of burning! Work on auxiliary heater may only be carried out when it has cooled down.

NOTE: CLAMP OFF coolant hoses on independent heater.

Recycling

Fuel escapes when fuel lines are detached. Have a suitable collecting vessel ready.

Catch and dispose of escaping fuel.

Observe country-specific waste disposal regulations.

Necessary preliminary tasks:

  • Remove LEFT WHEEL ARCH COVER

Removal:

Unclip intake silencer in marked area (2).

Release screws (2).

Disconnect fuel line (3).

Unlock connector (4) and disconnect.

HVAC

Release screws (1).

Unclip the fuel line (2).

Detach the holder (3).

HVAC

Cut open cable straps (1).

Unlock and disconnect connector (2).

HVAC

IMPORTANT: Secure auxiliary heater (2) against falling off/down!

Release spring band clamps (1) and detach coolant hoses.

Remove auxiliary heater (2).

HVAC

Replacement:

Release spring band clamp (1).

Release screws (2).

Slacken clamp (3) and pull off exhaust hose.

Take off holder (4).

HVAC

Unlock and disconnect connector (1).

Pull off air intake hose (2).

HVAC

Release screws (1).

Remove holder (2) from auxiliary heater (3).

HVAC

Installation:

Position auxiliary heater (2) correctly.

Attach coolant hoses and secure by spring band clamps (1).

HVAC

Connect connector (2).

Replace and secure cable straps (1).

HVAC

Position the holder (3) correctly.

Tighten down the screws (1).

Clip in the fuel line (2).

HVAC

Tighten screws (2).

Connect fuel line (3).

Connect the connector (4).

Clip in intake silencer in marked area (2).

HVAC

Required reworking:

  • Install LEFT WHEEL ARCH COVER
  • Fill and vent cooling system and check for leaks.

Removing and installing or replacing fuel pump (auxiliary heater)

Special tools required:

  • 13 3 010

Recycling

Fuel escapes when fuel lines are detached. Have a suitable collecting vessel ready.

Catch and dispose of escaping fuel.

Observe country-specific waste disposal regulations.

Seal off fuel hoses at fuel pump with special tool 13 3 010 .

HVAC

Necessary preliminary work:

  • Remove LEFT UNDERBODY PANELLING

Removal:

Release hose clamps (1) and pull fuel lines off.

Unlock and disconnect connector (2).

Release screw (3).

Remove electric fuel pump (4).

HVAC

Installation:

Mount electric fuel pump (4) and tighten screw (3).

Insert fuel lines and fasten with new hose clamps (1).

Connect connector (2).

NOTE: Observe direction of flow of fuel pump (4).

HVAC

Required reworking:

  • Mount LEFT UNDERBODY PANELLING

Removing and installing/replacing complete electric auxiliary heating

Risk of burning!

Carry out repair work only after engine has cooled down.

Necessary preliminary work:

  • Remove SUPPORT FOR DASHBOARD

Fold up the carpet (2) as shown.

Slacken nut (1).

Take off earth cable (3).

Installation note: Ensure correct line routing.

HVAC

Unlock plug connections (1) and (2) and disconnect.

Release screws (3).

Remove electric auxiliary heater (4) in direction of arrow from the heating and air conditioning unit (5).

HVAC

Removing and installing/replacing intake silencer for independent/auxiliary heater

WARNING: Risk of burning! Work on auxiliary heater may only be carried out when it has cooled down.

Necessary preliminary work:

  • Remove FRONT LEFT WHEEL ARCH COVER

Removal:

Pull air intake hose (1) off stationary/auxiliary heater.

Unclip intake silencer (2) in marked area.

HVAC

Installation:

NOTE: The mounting clip on the intake silencer must not be damaged!

Clip in intake silencer (2) in marked area.

Connect air intake hose (1) to stationary/auxiliary heater.

HVAC

Required reworking:

  • Mount FRONT LEFT WHEEL ARCH COVER

Removing and installing/replacing silencer (auxiliary heater)

WARNING: Risk of burning! Work on auxiliary heater may only be carried out when it has cooled down.

Necessary preliminary work:

  • REMOVE FRONT LEFT WHEEL ARCH TRIM

Removal:

Slacken clamp (1).

Release screw (2) and remove silencer (3).

HVAC

Installation:

Position silencer (3) correctly.

Tighten down screw (2).

Tighten clamp (1).

HVAC

Required reworking:

  • Install FRONT LEFT WHEEL ARCH COVER

Replacing changeover valve for independent/auxiliary heating

WARNING: Risk of scalding! Only perform the following repair work on an engine that has cooled down.

FOLLOW NOTES FOR REPAIR WORK ON COOLING SYSTEM .

NOTE: DISCONNECT coolant hoses from changeover valve for independent/auxiliary heater.

Necessary preliminary tasks:

  • REMOVE FRONT LEFT WHEEL ARCH COVER

Removal:

Release screws (1).

Disconnect fuel line (2).

HVAC

Release screws (1).

Unclip the fuel line (2).

Detach the holder (3).

HVAC

IMPORTANT: Risk of damage! Observe coolant through flow direction, mark coolant hoses before removing.

NOTE: If necessary, catch escaping coolant.

Unlock and disconnect the connector (1).

Release hose clips (2) and detach coolant hoses (3).

HVAC

Release screws (4).

Remove changeover valve for independent/auxiliary heating (5).

Installation:

Replacement:

Release screws (1).

Remove holder (2) from changeover valve for independent/auxiliary heating (3).

HVAC

Position changeover valve for independent/auxiliary heating (5) correctly.

Tighten screws (4).

Attach coolant hoses (3) correctly and secure with spring band clamps (2).

Connect the connector (1).

HVAC

Position the holder (3) correctly.

Tighten down the screws (1).

Clip in the fuel line (2).

HVAC

Tighten down the screws (1).

Connect fuel line (2).

HVAC

Required reworking:

  • INSTALL FRONT LEFT WHEEL ARCH COVER
  • Vent cooling system and check on watertightness.

Replacing turbocharger coolant pump for auxiliary heating

Special tools required:

  • 13 3 010

WARNING: Risk of burning! Repair work on the cooling system may only be carried out when it has cooled down.

Recycling

Coolant emerges when coolant lines are detached. Have a suitable collecting vessel ready.

Catch and dispose of emerging coolant.

Observe country-specific waste disposal regulations.

NOTE: CLAMP OFF coolant hoses

Necessary preliminary tasks:

  • Remove WHEEL ARCH COVER, LEFT

Removal:

Unlock and disconnect the connector (1).

Lift auxiliary coolant pump (2) off of holder (3).

HVAC

Disconnect coolant hoses (2) with special tool 13 3 010 Release spring band clamps (1) and pull off coolant hoses (2) from auxiliary coolant pump (3).

HVAC

Installation: Attach coolant hoses (2) on auxiliary coolant pump (3) correctly and secure with spring band clamps (1).

HVAC

Push auxiliary coolant pump (2) down into holder (3).

Connect the connector (1).

HVAC

Required reworking:

  • Install WHEEL ARCH COVER, LEFT
  • Fill and vent cooling system and check for leaks.
Heater with operation
...

Nozzles and outlets
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