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Audi Workshop Service and Repair Manuals

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Checking Lambda probe wiring > < Checking lambda probe and lambda control upstream of catalytic converter|(Cont.)

A3 Mk1

Checking basic voltage
Checking basic voltage
   
–  Unscrew protective cover -arrows- on vehicle floor.
  A26-0142
–  Unplug 6-pin connector (black) -1- for lambda probe upstream of catalytic converter -G39-.
–  Connect the multimeter for voltage measurement range (direct voltage) between contact 1 and contact 5.
  A23-0264
–  Switch on ignition.
t  Specification: 0.400 ... 0.500 V
–  Switch off ignition.
If specification is not attained:
–  Check lambda probe wiring → Chapter
  A23-0266

Checking Lambda probe wiring > < Checking lambda probe and lambda control upstream of catalytic converter|(Cont.)