A3 Mk2
| Exploded view |
| 1 - | ABS control unit (with ESP) -J104- |
Note| 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. |
| q | Fitting location: on hydraulic unit on right-side of engine compartment |
| q | Do not unplug connector before completing self-diagnosis. Switch off ignition before unplugging connector. |
| q | ABS/ESP system ITT Mark 60 → Chapter |
| q | Removing and installing (Mark 60) → Chapter |
| q | ABS system ITT Mark 70 → Chapter |
| q | Removing and installing (Mark 70) → Chapter |
| q | Removing and installing (TFSI engine) → Chapter |
| q | Removing and installing (RS 3) → Chapter |
| q | Removing and installing (2.0 ltr. TDI engine) → Chapter |
| q | Removing and installing (vehicles with diesel particulate filter) → Chapter |
| 2 - | ABS hydraulic unit -N55- |
| q | Fitting location: on hydraulic unit on right-side of engine compartment |
| q | The ABS hydraulic pump -V64-, the ABS hydraulic unit -N55- and the ABS control unit (with ESP) -J104- together make up the hydraulic control unit. |
| q | With integrated brake pressure sender 1 -G201- |
| q | Removing and installing (Mark 60) → Chapter |
| q | ABS/ESP system ITT Mark 60 → Chapter |
| q | ABS system ITT Mark 70 → Chapter |
| q | Removing and installing (Mark 70) → Chapter |
| q | Removing and installing (TFSI engine) → Chapter |
| q | Removing and installing (RS 3) → Chapter |
| q | Removing and installing (2.0 ltr. TDI engine) → Chapter |
| q | Removing and installing (vehicles with diesel particulate filter) → Chapter |
| q | Allocation → ETKA |
| 3 - | Button for TCS/ESP -E256- |
| q | Fitting location: on the centre console |
| 4 - | 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. |
| q | Combined in one housing |
| q | Combined lateral acceleration sender -G200- and yaw rate sender -G202- |
| q | Longitudinal acceleration sender -G251- (only four-wheel drive vehicles) |
| q | Removing and installing ESP sensor unit → Chapter |
| q | 20 Nm |
| 5 - | Stabilising program (TCS/ESP) warning lamp -K155- |
| q | Fitting location: In instrument cluster |
| 6 - | Brake pad warning lamp -K32- |
| q | Brake pad worn |
| q | Fitting location: In instrument cluster |
| 7 - | Brake system warning lamp -K118- |
| q | Fitting location: In instrument cluster |
| q | Brake malfunction, handbrake applied |
| q | Check brake fluid level if flashing |
| 8 - | ABS warning lamp -K47- |
| q | Fitting location: In instrument cluster |
| 9 - | Handbrake warning switch -F9- |
| q | Fitting location: on handbrake lever |
| 10 - | Rear right/rear left speed sensor -G44-/-G46-- |
| q | Removing and installing → Chapter |
| 11 - | Wheel bearing/hub unit |
| q | The sensor ring/rotor for ABS is installed in wheel bearing |
| 12 - | Wheel bearing housing |
| q | Removing and installing → Rep. gr.42 |
| 13 - | Steering angle sender -G85- |
| q | Fitting location: return ring with slip ring on steering column switch. |
| q | Removing and installing → Chapter |
| 14 - | Diagnostic connection |
| q | Fitting location: cover in driver's footwell |
| 15 - | Brake light switch -F- |
Note| The brake light switch is not fitted on all models |
| q | Removing and installing → Chapter |
| q | Removing and installing brake light switch on brake master cylinder → Chapter |
| q | Bolt on brake light switch: 5 Nm |
| 16 - | Front right/front left speed sensor -G45-/-G47- |
| q | Removing and installing → Chapter |
| 17 - | Brake master cylinder |
| q | Removing and installing → Chapter |
| q | With brake light switch attached |
Note| The brake light switch is not fitted on all models |
| q | Removing and installing brake light switch on brake master cylinder → Chapter |
| q | Bolt on brake light switch: 5 Nm |
| 18 - | Wheel bearing/hub unit |
| q | The sensor ring/rotor for ABS is installed in wheel bearing |
| 19 - | Wheel bearing housing |
| q | Removing and installing → Rep. gr.40 |
| 20 - | Brake fluid level warning contact -F34- |
| → Booklet808 |
