Checking electric vacuum pump for brakes V192 — AUDI

Audi
Audi A6
2005
Audi A6 Avant
2005
Running gear
Brake system
Edition
03.2013
Checking electric
vacuum pump for brakes
V192
Description and function
The vacuum pump is capable of self-diagnosis. Recognised faults are stored in the engine control unit.
The engine must not be running when you check the function of the electric vacuum pump via self-diagnosis.
Special tools and workshop equipment required
Vehicle diagnostic, testing and information system
VAS 5051
Diagnosis lead
VAS 5051/1
or
diagnosis lead
VAS 5051/3
Procedure
With ignition switched off, connect
vehicle diagnostic, testing and information system
VAS 5051
to diagnostic connection with
diagnosis lead
VAS 5051/1
or
diagnosis lead
VAS 5051/3
.
Switch on the tester
arrow
.
The tester may need up to 3 minutes before it is ready for operation.
Switch on ignition.
Select mode: Press the button on the display for
“Vehicle self-diagnosis”
.
Select vehicle system in display:
“Engine electronics”
.
The control unit identification and coding will appear at the top right of the display.
Select diagnosis function (all diagnosis functions are available at this stage).
Select
“006 - Basic setting”
on the display.
Press buttons
0
,
1
and
1
for Measured value block.
Confirm entry with
Q
key.
The following information will appear at the bottom of the display:
Basic setting
Not operated
Pump off
xxx mbar
Test off
Firmly depress the brake pedal several times in succession until the test is activated.
The following information will appear at the bottom of the display:
Basic setting
Not operated
Pump on
xxx mbar
Test on
Do not press the brake pedal again once the test has been activated.
The
vacuum pump for brakes
V192
supplies vacuum to the brake servo. The diagnosis of the brake servo system runs in the control unit at the same time.
The system passes the test if the pressure in the brake servo reaches the shut-off threshold within the time limit set by the diagnostic function.
The following information will appear at the bottom of the display:
Basic setting
Not operated
Pump off
xxx mbar
Syst. OK
You can cancel or exit from this mode by pressing the
Go to
button.
The system fails the test if the pressure in the brake servo does not reach the shut-off threshold within the time limit set by the diagnostic function.
The following information will appear at the bottom of the display:
Basic setting
Not operated
Pump off
xxx mbar
Syst.n.OK
Follow
“Guided Fault Finding”
procedure using
vehicle diagnostic, testing and information system
VAS 5051
.