TT Quattro Roadster L4-1.8L Turbo (AMU) (2002)
^ approx. +/- 2.5%
Channel 2 value (at partial load) should be:
^ Approx. +/- 10% (A4)
^ -2% to +8% (TT m.y. 2000).
^ -10% to 0% (TT from my. 2001)
-
If channel 2 value is:
^
Above +10% (A4)
^
Above 8% (TT m.y. 2000)
^
Above 0% (TT from m.y. 2001)
** These values indicate that the system is leaner than normal.
-
Check for air leaks in air duct before turbocharger using VAG 1687 Diagnostic Tool as outlined in Technical Bulletin Group 01 Number 01-01 dated
Oct. 26, 2001.
-
Check Mass Airflow Sensor -G70- **
If channel 2 value is:
^
Below -10% (e.g. -15%) (A4)
^
Below -2% for (TT m.y. 2000)
^
Below -10% (TT from my. 2001) These values indicate system is richer than normal (due to the engine getting less air than measured by the
MAF sensor)
-
Check for air leaks in pressure side air duct using VAG 1687 Diagnostic Tool as outlined in Technical Bulletin Group 01 Number 01-01 dated Oct.
26, 2001.
If values in Display group "032" are within limits:
^
Lambda adaptation and Mass Air Flow (MAF) sensor are OK
TT models only:
-
Select the <-- button.