Seat Leon >> Adaptive cruise control

Components of Adaptive Cruise Control

Fitting location overview - adaptive cruise control

Starter, current supply, CCS

  1. - Adaptive cruise control unit - J428-
    • Assembly overview
  2. - ACC button - E357-
    • Combined component with steering column switch module. Cannot be renewed individually.
    • Switch module: remove and install
  3. - Instrument cluster - KX2-
    • With control unit in dash panel insert - J285-
    • Removal and installation

Removing and installing the automatic distance control unit

Special tools and workshop equipment required

  • Lever - U30800-

Starter, current supply, CCS

  • Torque wrenches - VAG 1331-

Starter, current supply, CCS

Note For greater clarity the bumper grille is not depicted in the illustration.

Removing

  • Switch off ignition and all electrical consumers.

Vehicles without access and start authorisation system

  • Remove ignition key, if fitted.

Vehicles with access and start authorisation system

  • Store the ignition key outside the vehicle to prevent the ignition from being switched on unintentionally.

Continued for all vehicles

  • Removing trim for radar sensor.
  • Pull out the plug -2-.
  • Prise out the securing tabs -1- with the aid of the lever - U30800- in order to free the centre nipple.
  • Turn the adaptive cruise control unit - J428- -3- in the -direction of the arrow-.

Starter, current supply, CCS

  • Remove the adaptive cruise control unit - J428- -1- in the -direction of the arrow-.

Installing

Installation is carried out in the reverse sequence; note the following:

  • Calibrate adaptive cruise control

Starter, current supply, CCS

Radar holder for the adaptive cruise control unit - J428- : remove and install

Special tools and workshop equipment required

  • Calliper square - VAS 6335-

Note

  • For greater clarity the bumper grille is not depicted in the illustration.
  • Completely remove the adaptive cruise control unit assembly - J428- .

Removing

  • Switch off ignition and all electrical consumers.

Vehicles without access and start authorisation system

  • Remove ignition key, if fitted.

Vehicles with access and start authorisation system

  • Store the ignition key outside the vehicle to prevent the ignition from being switched on unintentionally.

Continued for all vehicles

  • Removing trim for radar sensor

 

  • Pull out the plug -1-.
  • Unscrew bolts -arrows-.
  • Lay the adaptive cruise control unit assembly - J428- -2- on a workbench.

Starter, current supply, CCS

  • Release the fasteners -1- in the -direction of the arrow-.
  • Remove the fasteners -1- from the studs -2-.
  • Remove the radar holder -3- from the assembly -4- adapter/ adaptive cruise control unit - J428- .

Installing

Installation is carried out in the reverse sequence; note the following:

Starter, current supply, CCS

Note

  • Replace the fasteners -1-.
  • The studs -1- on the adapter are pre-set. If necessary, adjust the setting.

Removing and installing trim for radar sensor

Special tools and workshop equipment required

  • Lever for the front-end - 3370-

Starter, current supply, CCS

Removing

  • Switch off ignition and all electrical consumers.

Vehicles without access and start authorisation system

  • Remove ignition key, if fitted.

Vehicles with access and start authorisation system

  • Store the ignition key outside the vehicle to prevent the ignition from being switched on unintentionally.

Continued for all vehicles

  • Insert the lever for the front end - 3370- in the side recess and pull not too strongly in the -direction of the arrow-.

Starter, current supply, CCS

Note For greater clarity the bumper grille is not depicted in the illustration.

  • Remove with the fixing lugs -2- on both sides.

Installing

Installation takes place in reverse order.

Settings of the studs on the adapter

Special tools and workshop equipment required

  • Gauges for measuring spacing - VAS 6335-

In order to measure the adjustment dimension and be able to carry out adjustment the assembly adaptive cruise control unit assembly consisting of the following components - J428- must be fitted:

  • Fasteners
  • Radar holder
  • Studs
  • Adapters
  • Adaptive cruise control unit - J428-
  • Lay the adaptive cruise control unit assembly - J428- down on a soft and clean surface.

 

  • With a sliding calliper measure - VAS 6335- the setting dimension -a- on all studs and adjust if necessary.
    • Setting dimension -a-= 68.2 mm

  • Adjuster screws -2- of the adaptive cruise control unit - J428- -1-.

Starter, current supply, CCS

Remove and install adapter

Special tools and workshop equipment required

  • Lever - U30800-

  • Torque wrenches - VAG 1331-

Starter, current supply, CCS

  • Calliper square - VAS 6335-

Removing

  • Switch off ignition and all electrical consumers.

Vehicles without access and start authorisation system

  • Remove ignition key, if fitted.

Vehicles with access and start authorisation system

  • Store the ignition key outside the vehicle to prevent the ignition from being switched on unintentionally.

Continued for all vehicles

  • Disconnect ignition and all electrical loads, and remove ignition key.
  • Remove the radar holder for the adaptive cruise control unit - J428- .
  • Prise out the securing tabs -1- with the aid of the lever - U30800- and move the adaptive cruise control unit - J428- -2- in -the direction of the arrow-.

Starter, current supply, CCS

  • Remove the adaptive cruise control unit - J428- -2- from the adapter -1- in -the direction of the arrow-.

Installing

Installation is carried out in the reverse sequence; note the following:

Starter, current supply, CCS

Note

  • Replace the fasteners .
  • The studs on the adapter are pre-set. If necessary, adjust the setting.

Assembly overview - adaptive cruise control unit - J428-

Note For greater clarity the bumper grille is not depicted in the illustration.

Starter, current supply, CCS

  1. - Cover
    • Removal and installation
  2. - Adaptive cruise control unit - J428-
    • Removal and installation
    • Calibrating
  3. - Adapter
    • Removal and installation
    • Measure adjustment and adjust if necessary
  4. - Threaded pins
    • 2 units.
    • If adjustment is completed, stud setting must not be changed anymore.
    • Measure adjustment and adjust if necessary
  5. - Screw
    • 2 units.
    • 8 Nm
  6. - Radar holder
    • Removal and installation
  7. - Mounting clips
    • 3 units.
    • Renew
  8. - Electric connector
  9. - Front bumper bracket
    • On the front cross member

Calibrating adaptive cruise control

Requirements

  • The adaptive cruise control unit - J428- needs to be calibrated if the following conditions apply:
    • Adaptive cruise control unit - J428- has been removed and then reinstalled or it has been renewed.
    • Bumping into adaptive cruise control unit - J428- due to incautious installation of front bumper carrier.
    • Damage to the front bumper carrier as a result of a front-end collision or similar.
    • The front bumper carrier has been removed and then reinstalled or it has been renewed.
    • Rear axle toe has been adjusted.

Note

  • Excessive horizontal adjustment of the adaptive cruise control unit - J428- results in permanent deactivation of the functions ACC/front scan system. This is displayed in the dash panel insert - KX2- by the following message: ACC / Front Assist not available.
  • Limited sensor functionality due to soiling or weather conditions such as heavy rain, snowfall, sensor icing etc. results in a temporary non-availability of the functions ACC/front scan system. This is displayed in the dash panel insert - KX2- by the following message: ACC / Front Assist: Sensor without view.

 

  • Calibrate adaptive cruise control.
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