TT Roadster L4-2.0L Turbo (BWA) (2009)
/Page-628001.png)
Oxygen Sensor: Testing and Inspection
Oxygen Sensor (O2S) 1 (Behind Three Way Catalytic Converter (TWC)) Heater (Z29), checking
Oxygen Sensor (O2S) 1 (behind Three Way Catalytic Converter (TWC)) Heater (Z29), checking
‹› Oxygen Sensor (O2S) 1 (behind Three Way Catalytic Converter (TWC)) Heater ( Z29) is part of Oxygen Sensor (O2S) Behind Three Way
Catalytic Converter (TWC) (G130) and cannot be replaced separately.
‹› Vehicle must be raised before electrical harness connector for the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G130) is
accessible.
‹› When servicing terminals in harness connector of Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G130), use only
gold-plated terminals.
Special tools, testers and auxiliary items required
‹› Multimeter.
‹› Wiring diagram.
Test requirements
‹› Fuse (SB6) OK.
‹› Motronic Engine Control Module (ECM) Power Supply Relay (J271) OK.
‹› Battery voltage at least 12.5 volts.
‹› All electrical consumers such as, lights and rear window defroster, switched off.
‹› Vehicles with automatic transmission, shift selector lever into position " P" or "N".
‹› A/C switched off.
‹› Ground (GND) connections between engine/transmission/chassis OK.
‹› Ignition switched off.
Test procedure
-
Perform a preliminary check to verify the customers complaint. Refer to => [ replacing ] See: Engine Control Module/Testing and
Inspection/Engine Control Module (ECM) (J623).
Start diagnosis
-
Remove the retaining nuts - 1 and 2 - and the cover.
