Passat GLS Wagon L4-1.8L Turbo (AUG) (2001)
-
Press -C- button.
Indicated on display:
Read measuring value block
Enter display group number XXX
-
Press buttons -0-, -3- and -0- to select "Display group number 30". Press -Q- button to confirm input.
Indicated on display: (1 to 4 = display fields)
Read measuring value block 30
->
1
2
3
4
-
Check operational condition of oxygen sensor control behind catalytic converter (display field 2): Specification: x 1 x
NOTE: The bits in display fields 2 are only set to I after catalytic converter temperature has risen to above 350 °C (See display group 34, display field
2).
The sensor heater is pulsed by the Engine Control Module (ECM). This is why the indication for the sensor heater alternates between 0 and 1.
Explanation of 3-digit value in display field 2:
If oxygen sensor heater is not active:
-
Test oxygen sensor heater after catalytic converter. See: Heater Check
If oxygen sensor or oxygen sensor control is not active:
-
Check primary voltage.
NOTE: Oxygen sensor control is not active for engine code AWM.
If specified value is obtained:
-
Press -C- button.
-
Press buttons -0-, -3- and -6- to select "Display group number 36". Press -Q- button to confirm input.
Indicated on display: (1 to 4 = display fields)
Read measuring value block 36
->
1
2
3
4
-
Check oxygen sensor voltage behind catalytic converter in display field 1: Specification: 0.100 to 0.900 volts (may oscillate slightly)
If indication in display field 1 remains constant on one value:
-
Continue testing according to the following table.