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Testing lambda probe G130 and lambda control downstream of catalytic converter > < Testing lambda probe G39 and lambda control upstream of catalytic converter

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Testing lambda probe ageing upstream of catalytic converter G39
Testing lambda probe ageing upstream of catalytic converter -G39-
Special tools and workshop equipment required
t  Vehicle system tester -V.A.G 1552 - with cable -V.A.G 1551/3, 3A, 3B oder 3C-
Test condition
l  Coolant temperature at least 80 °C ⇒ read measured value block 004, display block 3 → Chapter.
Check for proper operation
–  Connect vehicle system tester -V.A.G 1552-. Start engine and select address word 01 “Engine electronics” → Chapter.
–  Select function 04 for “Initiate basic setting” and display group 034.
–  Depress brake pedal and accelerator simultaneously.
   
–  Engine speed is raised to 1400...2800 rpm.
  Note
This may take a few minutes.
–  Maintain engine speed at 1400...2800 rpm until the readout in display field 4 changes from “Test off” to “Test on”. Catalytic converter temperature in display field 2 must be at least 352 °C.
–  Check period in display field 3:
Specified value: max. 2.20 sec.
–  Maintain engine speed at 1400...2800 rpm until the readout in display field 4 shows ”B1 S1 o.k.”.
If the specified values are not reached:
–  Conduct a test drive in order to eliminate any residues on the lambda probe and repeat the test.
Comply with the safety instructions during the test drive → Chapter.
If the specified value is again not reached:
–  Replace lambda probe upstream of catalytic converter -G39-.
  
System in basic setting 34            ->
1600 rpm   355 °C    2.20 s   B1 S1 o.k.

Testing lambda probe G130 and lambda control downstream of catalytic converter > < Testing lambda probe G39 and lambda control upstream of catalytic converter