Work step 6: Checking heated oxygen sensor

NOTE: Use VAG1788/10 RPM adjuster to achieve increased engine speed.

Rapid data transfer HELP
Select function XX

When indicated on display

Press buttons "08" for the function "Read measuring value block" and press Q button to confirm input.

Read Measuring Value Block Q
Input display group number XXX

When indicated on display

Read Measuring Value Block 41 →
1 2 3 4

When indicated on display

NOTE: Increasing engine speed accelerates the obtaining of specified values.

	Display fields
	1	2	3	4
Display group 41: Heated oxygen sensor
Display	no indication or x.xx kOhm	---	no indication or x.xx kOhm	---
Indicated	Internal resistance of oxygen sensor before catalytic converter that creates sensor voltage	Condition of heater for oxygen sensor before catalytic converter	Internal resistance of oxygen sensor behind catalytic converter that creates sensor voltage	Condition of heated oxygen sensor of oxygen sensors behind catalytic converter
Work area	---	Htng.bef.cat.ON Htng.bef.cat.OFF	---	Htng.beh.cat.ON Htng.beh.cat.OFF
Specified value:	Smaller than 2 kOhm or 88 10 1	Htng.bef.cat.ON Htng.bef.cat.OFF (Indication jumps back and forth between ON/OFF)	Smaller than 2 kOhm or 88 10 1	Htng.bef.cat.ON Htng.bef.cat.OFF (Indication jumps back and forth between ON/OFF)

Important Notes to display fields 1 and 3:

If oxygen sensors have not yet reached their operating temperature, there will be no indication in display fields 1 and 3, i.e. they will both be empty.
After reaching operating temperature of the two oxygen sensors, a resistance of less than 2kOhm must be indicated in display fields 1 and 3.
Do not continue test until a resistance of less than 2k Ohm is indicated in display fields 1 and 3.