ABS and ESP Assembly Overview
ABS and ESP Assembly Overview
1 - Traction Control Indicator Lamp (00824-3424) (K86)
• Component location: In the instrument cluster
• more information Owner's Manual
• It blinks when driving if ESP engages regularly.
• It comes on as a function test when the ignition is started.
• It comes on when the ignition is switched on and goes out after driving a short distance when the ESP performs a system-specified adaptation process on its sensors.
• It comes on when the ESP or ASR lamp malfunctions.
• comes on if ESP is switched off.
• It comes on if there is an ABS malfunction because the ESP system works together with ABS.
• If the battery was disconnected and connected, the vehicle was started by jump starting or the battery is very low, the ESP performs an adaptation sequence on its sensors during the first several meters driven. The indicator light comes on for this. The indicator light goes out as soon as the adaptation process is completed.
• If indicator light comes on immediately after starting engine, there is a system-directed shut down of the system In this case, ESP can be reactivated by switching ignition on and off. If the indicator light goes out, the system is completely functional again.
2 - ABS Warning Lamp (K47)
• Component location: In the instrument cluster
• more information Owner's Manual
• The indicator light comes on for several seconds when the ignition is switched on or the engine is started. The indicator light goes out after an automatic test has been completed.
There is an ABS malfunction:
• The indicator light does not come on when the ignition is switched on.
• The indicator light goes out again after a few seconds
• The indicator light comes on when driving.
• The vehicle can still be braked with the standard brake system, that is, without ABS.
• The ESP indicator light also comes on when there is an ABS malfunction.
Malfunction in complete brake system.
• If the ABS indicator light comes on together with the brake system indicator light, not only is the ABS faulty but it must be assumed that the brake system is as well.
• If the brake system malfunctions, the symbol appears in the instrument cluster display.
3 - Symbol Brake System Warning Lamp (K118)
• Location in instrument cluster in Driver Information System
• If the indicator light blinks, there is a brake system malfunction.
The brake system indicator light blinks when the brake fluid is too low, when there is a malfunction in the ABS system or if the electro-mechanical parking brake is malfunctioning.
• more information Owner's Manual.
4 - Steering Angle Sensor (G85) with ESP
• Component location: Installed in coil ring with slip ring on steering column.
• Perform zero adjustment.
Vehicle Diagnosis, Testing and Information System (VAS 5051B) or (VAS 5052)
5 - Parking Brake Pressure Switch (F234)
• Component location: in center console
• removing and installing, refer to => [ Parking Brake Contact Switch ] Parking Brake Contact Switch
6 - ESP-Sensor Unit (G419)
• Component location: under center console extension
• can be tested in "Guided Fault Finding" using the Vehicle Diagnosis, Testing And Information System (VAS 5051B) or (VAS 5052)
• follow the installation instructions
=> [ ESP Sensor Unit ] Service and Repair
7 - Wheel bearing/wheel bearing unit
• The ABS sensor ring is installed inside the wheel bearing.
8 - Right/Left Rear ABS Wheel Speed Sensor (G44/G46)
• can be tested in "Guided Fault Finding" using the Vehicle Diagnosis, Testing And Information System (VAS 5051B) or (VAS 5052)
• removing and installing, refer to => [ Speed Sensor, Rear Axle ] Service and Repair
9 - Diagnostic connection
• Component location: driver side footwell cover
• => Fig. 1
10 - Wheel bearing/wheel bearing unit
• The ABS sensor ring is installed inside the wheel bearing.
11 - Right/Left Front ABS Wheel Speed Sensor (G45/G47)
• can be tested in "Guided Fault Finding" using the Vehicle Diagnosis, Testing And Information System (VAS 5051B) or (VAS 5052)
• removing and installing, refer to=> [ Speed Sensor, Front Axle ] Description and Operation
12 - ABS Hydraulic Unit (N55) with ABS Control Module with EDL (J104)
• The hydraulic control unit is comprised of the hydraulic unit and control unit.
• Brake Pressure Sensor 1 (G201) is integrated inside the ABS Hydraulic Unit (N55) and can only be replaced together.
• Do not disconnect connector (42-pin) before successfully completing self-diagnosis. Switch ignition off before separating connector.
• Component location: on the hydraulic unit in engine compartment, left
• removing and installing, refer to => [ Hydraulic Control Unit ] Service and Repair
• for removing and installing, RS 6 and S6, refer to => [ Hydraulic Control Unit, S6 and RS 6 ]
13 - Electric Brake Vacuum Pump (V192)
• removing and installing, refer to => [ Electric Vacuum Pump ] Electric Vacuum Pump
• for removing and installing, S6, refer to => [ Electric Vacuum Pump, S6 ]
Mechanical brake booster vacuum pump, refer to => [ Vacuum Pump ] Vacuum Pump
Removing and installing the mechanical vacuum pump on a 3.0L TFSI vehicle. Refer to=> [ Vacuum Pump, 3.0L Gasoline ]
Mechanical brake booster vacuum pump, RS 6, refer to => [ Vacuum Pump Component Overview, RS 6 ] Vacuum Pump Component Overview, RS 6
• On the RS 6, the engine must first be removed in order to remove and install the vacuum pump.
14 - Brake lamp switch - F - and Cruise Control Brake Pedal Switch (F47)
• removing and installing, refer to=> [ Brake Light Switch ] Service and Repair
• brake lamp sensor, new version, removing and installing. Refer to => [ Brake Lamp Sensor ] Service and Repair
• can be tested in "Guided Fault Finding" using the Vehicle Diagnosis, Testing And Information System (VAS 5051B) or (VAS 5052)
15 - Tandem brake booster
• removing and installing, refer to=> [ Brake Booster ] Service and Repair
16 - Brake Fluid Level Warning Switch (F34)
17 - ASR/ESP Button (E256)
• Component location: in center console
18 - ACC Brake Pressure Sensor (G519)
• location: on the brake pipe distributor inside the engine compartment
• it may be necessary to replace the old version with the new version
• If the old version of the pressure sensor (1J0...) is installed, it will not be possible to bleed the brake system completely. Replace the pressure sensor with the new version (4F0...).
• removing and installing, refer to => [ Brake Pressure Sensors ] Service and Repair
• Tightening specification: 28 Nm.
19 - Acc Brake Pressure Sensor (G518)
• location: on the brake pipe distributor inside the engine compartment
• it may be necessary to replace the old version with the new version
• If the old version of the pressure sensor (1J0...) is installed, it will not be possible to bleed the brake system completely. Replace the pressure sensor with the new version (4F0...).
• removing and installing, refer to => [ Brake Pressure Sensors ] Service and Repair
• Tightening specification: 28 Nm.
Diagnostic connection
