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Testing brake vacuum pump V192 > < Test condition

Octavia Mk1

Test sequence
Test sequence
  Note
t  Because of the vacuum in the intake system the leak search spray is sucked in with the unmetered air. The leak search spray reduces the ignition performance of the mixture. This results in a drop in engine speed and a change in the lambda probe control value.
t  You must comply with the safety instructions on the box.
–  Connect vehicle system tester -V.A.G 1552-. Start engine and select the address word 01 “Engine electronics” → Chapter 01-1.
–  Enter function 08 “read measured value block” and select display group 001.
   
Readout on display:
–  Observe engine speed in display field 1 and readout for lambda control upstream of catalytic converter in display field 3.
–  Systematically spray parts of the intake system with engine leak search spray.
If the engine speed drops or if the displayed lambda control value changes:
–  Press →.
–  Enter 06 for the function “End output” and confirm with Q.
–  Switch off ignition.
–  Check the sprayed location of the intake system for leaks and if necessary eliminate the fault.
  
Reading measured value block         1   ->
700/min    85.0 °C     1.5 %    10111111

Testing brake vacuum pump V192 > < Test condition