Display Group 034
DISPLAY GROUP 034Heating Current Of Front And Rear Heated Oxygen Sensors (HO2S), Banks 1 and 2
DISPLAY OVERVIEW
VAG 1551 Display Overview, Display Group 034:
NOTES
^ The values specified only apply with battery positive voltage (B+) between 12-14 volts, see display group 001, display field 4.
^ Heating current (B+) for the front HO2S, banks 1 and 2 is switched ON via the fuel pump relay (immediately when the engine starts). Ground (GND) is supplied by the ECM.
^ Heating current for the O2S behind TWC, banks 1 and 2, only switches on when the calculated exhaust gas temperature exceeds 420°C (788°F), see display group 036, display field 1. In order to achieve the calculated exhaust gas temperature after a cold start, vehicle must be driven approx. 20 seconds at and engine speed of 2500 RPM.