audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

ABOUT US
Removing and installing steering angle senderG85 > < Removing and installing brake light switch on brake master cylinder

A3 Mk2

Removing and installing ESP sensor unitG419
Removing and installing ESP sensor unit -G419-
  Note
t  On right-hand and left-hand drive vehicles up to model year 2008, sensor unit -G419- is always installed underneath right-hand seat.
t  From model year 2009 onwards, sensor unit -G419- is installed in ABS control unit (with ESP) -J104-.
t  From model year 2009 onwards, ABS control unit (with ESP) -J104- must be renewed if sensor unit -G419- is defective.
t  From model year 2009 onwards, ABS control unit (with ESP) -J104- must be calibrated after it has been renewed.
t  From model year 2009 onwards, steering angle and brake pressure are also measured by the ABS control unit (with ESP) -J104-; these values must then be calibrated.
  Note
t  Control unit for ABS (with ESP) -J104- Mark 60 → Chapter
t  Control unit for ABS (with ESP) -J104- Mark 70 → Chapter
Removing
  Note
The ESP sensor contains the following senders: lateral acceleration sender -G200-, yaw rate sender -G202- and longitudinal acceleration sender -G251- (only four-wheel drive vehicles).
–  Remove seat (right-side) → Rep. gr.72.
–  Remove sill panel trim (on passenger side) and lift up carpet → Rep. gr.72.
–  Detach electrical connector -2-.
   
–  Unscrew bolts -4-.
–  Remove ESP sensor unit -1- upwards.
–  Item -3-: seat cross member
Arrow in illustration faces direction of travel
  Note
t  The ESP sensor unit is sensitive to impact.
t  If the ESP sensor unit has been dropped, it may not work properly. The sensor unit is then no longer to be used.
Installing
Installation is performed in reverse sequence; note the following:
–  Calibrate lateral acceleration sender -G200-.
–  Calibrate longitudinal acceleration sender -G251- (four-wheel drive vehicles only).
To do so, use the vehicle diagnosis, testing and information system -VAS 5051 x- or -VAS 5052-.
–  See: Running gear
–  Brake system (Repair group 01; 45)
–  01 - Self-diagnosis compatible systems
–  03 - Brake electronics ABS/ESP Mark 60
–  Calibrate lateral acceleration sender -G200-.
–  Calibrate longitudinal acceleration sender -G251- (four-wheel drive vehicles only), or
–  Carry out ESP road test and system test.
To do so, use the vehicle diagnosis, testing and information system -VAS 5051 x- or -VAS 5052-.
–  See: Running gear
–  Brake system (Repair group 01; 45)
–  01 - Self-diagnosis compatible systems
–  03 - Brake electronics ABS/ESP Mark 60
–  J104 - Control unit for ABS/TCS/ESP, Functions
Tightening torque
  A45-0204
Component Nm
ESP sensor unit to bracket20

   

Removing and installing steering angle senderG85 > < Removing and installing brake light switch on brake master cylinder