Bleeding sequence for vehicles with Electronic Stability Program (ESP) — AUDI

Please note:

A pressure of at least 2 bar is required for bleeding the ESP hydraulic unit. Therefore always check the pressure setting on the bleeding device.

First, all of the brake calipers are bled using the conventional method, but in a different sequence.

Afterwards the ESP hydraulic pump needs to be bled. This is done using the fault reader.

The fault reader is used to actuate the hydraulic pump for 10 s.

This actuation must only be carried out a maximum of 3 times in succession (approx. 30 sec.). Then the pump must be left to cool for at least 5 minutes.

Special tools and workshop equipment required

V.A.G 1551 or V.A.G 1552

V.A.G 1869 bleeding appliance.

Bleeding sequence

1 -
Rear left brake caliper
2 -
Front right brake caliper
3 -
Rear right brake caliper
4 -
Front left brake caliper

Bleed the calipers until clear, bubble-free brake fluid emerges.
Close bleed screw.

Connecting fault reader V.A.G 1551 and selecting address word

The vehicle systems tester V.A.G 1552 can also be used instead of fault reader V.A.G 1551. However, with vehicle systems tester V.A.G 1552 there is no option to print out information.

Unlatch the ash tray and remove it from the centre console.

Remove the cover for the diagnostic connector.
With the ignition off, connect fault reader to diagnostic connector using wire V.A.G 1551/3.

V.A.G
Indicated on display:

1) Displayed alternately

Notes:

Check the connections of the diagnostic connector if there is no display on the screen.

=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations

The PRINT key is used to switch on the printer. When the printer is on the warning lamp in the print key illuminates.
Depending on the program, additional operating information can be printed out by pressing the HELP key of V.A.G 1551.

Switch the ignition on.
Switch on the printer by pressing the Print key on the fault reader.
Press key -1- for "Rapid data transfer" operating mode.

Rapid data transfer
HELP
Enter address word XX
Indicated on display:

Press keys 0 and 3 for the address word "Brake electronics".

Rapid data transfer
Q
03 Brake electronics
Indicated on display:

Confirm input with Q key.

Rapid data transfer
Tester sends address word 03
Display after address word 03 has been entered:

Note:

If there is a fault in the communications build-up between the fault reader V.A.G 1551 and the control unit:

=> Running Gear Self-Diagnosis; Repair group 01; Basic Notes on Self-Diagnosis; Connecting fault reader V.A.G 1551 and selecting address word
Running Gear Self-Diagnosis
Basic Notes on Self-Diagnosis
Connecting fault reader V.A.G 1551 and selecting address word

Rapid data transfer
HELP
Select function XX
Indicated on display:

Press keys 0 and 4 to select function "Basic setting".

Rapid data transfer
Q
04 Basic setting
Indicated on display:

Confirm input with Q key.

Basic setting
Q
Enter display group number XXX
Indicated on display:

Open the bleeder screw on the front left brake caliper.

Press the keys 0, 0 and 2 and confirm the entry by pressing Q.

System in basic setting
2⇒
Bleeding system
Indicated on display:

The ESP hydraulic pump -V156- is now actuated for 10 seconds.

This actuation must only be carried out a maximum of 3 times in succession (approx. 30 sec.). Then the pump must be left to cool for at least 5 minutes.

To cancel the actuation press the ⇒ key. The program then returns to its initial settings.

Rapid data transfer
HELP
Select function XX
Indicated on display:

Bleed the calipers until clear, bubble-free brake fluid emerges.
Close bleed screw.
Press keys 0 and 6 for the function "End output".

Rapid data transfer
Q
06 - End output
Indicated on display:

Confirm input with Q key.

Rapid data transfer
HELP
Enter address word XX
Indicated on display:

Switch ignition off.
Disconnect fault reader.
Switch off V.A.G 1869.
Check the brake fluid level in the reservoir and correct as necessary.