Passat L4-1.8L Turbo (AWM) (2004)
If oxygen sensor heater is not active:
-
Test oxygen sensor heater after catalytic converter. See: Oxygen Sensor After Catalyst/Heater Check
If oxygen sensor or oxygen sensor control is not active:
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Check primary voltage.
NOTE: Oxygen sensor control is not active for engine code AWM.
If specified value is obtained:
-
Press -C- button.
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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.