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Home >> Audi >> 2009 >> S4 Automatic >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake System >> 47 - Brakes - Hydraulic components >> Brake system vacuum pump V192 >> Reading measured value block

Reading measured value block

Indicated on display (function selection): Vehicle system - test HELP Select function XX

Indicated on display: Read measured value block HELP Enter display group number XXX

Display group 008 

Read measured value block 8 → Indicated on display:
Operated/not operated Pump off Pump on XXX mbar Test off/Test on  
      Test
  • Test (short test) off
  • Test (short test) on
    Vacuum
  • Vacuum measured at brake booster unit
  • Display for ventilated brake booster unit approx. 960, for evacuated brake booster unit approx. 450, depending on ambient pressure.
  Vacuum pump
  • Pump off
  • Pump on
  • If pump does not run although display shows "Pump on" conduct fault finding according to current flow diagram.
Brake pedal:
  • Brake pedal not depressed
  • Brake pedal depressed
  • In the event of any deviations check brake light switch.