Work step 7: Checking oxygen sensor heating

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

Rapid data transfer HELP
Select function XX

Indicated on display:

Press buttons -0- and -8- to select "Read Measuring Value Block" and press -Q- button to confirm input.

Read Measuring Value Block Q
Input display group number XXX

Indicated on display:

Press buttons -0-, -4- and -1- to select "display group number 041" and press -Q- button to confirm input.

Read Measuring Value Block 41 →
1 2 3 4

Indicated on display:

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

	Display fields
	1	2	3	4
Display group 041: Oxygen sensor heating
Display	no indication or x.xx kOhm	---	no indication or x.xx kOhm	---
Indicated	Internal resistance of oxygen sensor before catalytic converter that generates sensor voltage	Condition of oxygen sensor heating for oxygen sensor before catalytic converter	Internal resistance of oxygen sensor behind catalytic converter that generates sensor voltage	Condition of oxygen sensor heating for oxygen sensor behind catalytic converter
Functional range	---	Htng.bef.cat.ON Htng.bef.cat.OFF	---	Htng.beh.cat.ON Htng.beh.cat.OFF
Specified value	smaller than 2 kOhm	Htng.bef.cat.ON Htng.bef.cat.OFF (Indication jumps back and forth between ON/OFF)	smaller than 2 kOhm	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 2 kOhm must be indicated in display fields 1 and 3.
Do not continue test until a resistance of less than 2 kOhm is indicated in display fields 1 and 3.