Jetta GLS L4-1.8L Turbo (AWP) (2002)
If the specification is not obtained:
-
Check the oxygen sensor heating before catalyst. See: Heater Check
If the specification is obtained:
-
Change to display group 32 as follows:
-
Press C key.
-
Press keys 0, 3 and 2 for "Display group number 32" and confirm entry with Q key.
Indicated on display: (1 to 4 = Display zones)
Read measured value block 32
->
1
2
3
4
-
Check oxygen sensor learned values at idling speed (additive) in display zone 1.
Specification: -10.0 to 10.0 %
-
Check oxygen sensor learned values at part load (multiplicative) in display zone 2.
Specification: -10.0 to 10.0 %
If the specification is not obtained:
-
Evaluating display group 32, Refer to "Scan Tool Testing/VAG1551/Evaluating Display Group 30 to 49, 99, 107 (Oxygen Sensor Control)", See:
Testing and Inspection
If the specification is obtained:
-
Change to display group 33 as follows:
VAG1551: Press key 3
VAG1552: Press key (up arrow)
Indicated on display: (1 to 4 = Display zones)
Read measured value block 33
->
1
2
3
4
-
Observe oxygen sensor control in display zone 1. The display must fluctuate at least 2 % in the range -10.0 to 10.0 %
If the oxygen sensor control in display zone 1 does not fluctuate as stated:
-
Press -> key.
-
Press keys 0 and 6 for the "End data transfer" function and confirm input with the Q key.
-
Carry out road test and burn oxygen sensors clean and repeat check.
Observe the valid safety precautions when carrying out a road test See: Service Precautions/Technician Safety Information
If the the specifications in display zone 1 are not obtained even after a test drive, or the value does not fluctuate by at least 2 %:
-
Replace the Heated Oxygen Sensor (HO2S)(G39).