New Beetle L4-2.0L (AZG) (2003)
If the specification is not obtained:
-
Check Heated oxygen sensor after catalyst.
If the specification is obtained:
-
Press C button.
-
Press buttons 0, 3 and 6 for "Display group number 36" and confirm entry with Q button.
Indicated on display: (1 to 2 = Display zones)
Read measured value block 36
->
1
2
-
Check oxygen sensor basic voltage after catalyst in display zone 1:
Specification: 0.100 to 0.900 V (can fluctuate slightly)
If the display in display zone 1 remains constant:
-
Continue check according to following table.
Display
Cause
Between 0.400
to 0.490 V
Open Circuit
1.100 V
Short to positive
0.000 V
Short to Ground
Possible causes of malfunction if sensor control frequency is too slow:
-
The slots or holes in sensor body are blocked
-
The sensor vent hole in area of connecting wire is blocked
-
The sensor has been overheated (glazed)
-
The sensor has been damaged by leaded fuel
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Check diagnosis result in display zone 2:
Specification: B1-P2 OK
NOTE: It can take a few minutes until display jumps from "Test ON" to "B1-P2 OK".
If "B1-P2 nOk is displayed:
-
Press -> button.
-
Check DTC memory. Refer to "Displaying and Reading Trouble Codes/With Manufacturers Scan Tool/DTC Memory Checking and Erasing" See:
Testing and Inspection
-
Carry out a test drive to remove possible residue on oxygen sensor and repeat check.