Cabrio GLX L4-2.0L (ABA) (2001)
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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 Measuring Value Block 32
->
1
2
3
4
-
Check Oxygen sensor learned values at idle speed (additive) in display zone 1.
Specification: -10.0 to 10.0%
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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, See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Scan Tool Testing and Procedures/Manufacturer's Scan Tool/Read Measuring Value Blocks, (Function 08)/Measuring Value Blocks,
Evaluating/Display Groups 30 to 46, 99 (Oxygen Sensor Control), Evaluation
If the specification is obtained:
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Change to display group 33 as follows:
VAG 1551: Press key 3
VAG 1552: Press key upper-arrow
Indicated on display: (1 to 4 Display zones)
Read Measuring Value Block 33
->
1
2
3
4
-
Observe Oxygen sensor control in display zone 1. Display must fluctuate at least 2% in the range -10.0 to 10.0%
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Check Oxygen sensor voltage in display zone 2. Voltage must fluctuate at least 20 times per minute in range of 0 to 1.0 V.
If the display in display zone 2 remains constantly at a value:
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Continue check according to following table.
If the Oxygen sensor control in display zone 1 does not fluctuate as stated:
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Press -> key.
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Press keys 0 and 6 for "End data transfer" function and confirm input with Q key.
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Carry out road test to burn Oxygen sensors clean and repeat check.
Observe the valid safety precautions when carrying out a road test See: Powertrain Management/Fuel Delivery and Air Induction/Service
Precautions/Technician Safety Information.
If the specifications in display zone 1 are not obtained even after a test drive, or the value does not fluctuate by at least 2%:
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Check Oxygen sensor before catalytic converter for aging See: Oxygen Sensor 1 Aging, Checking
Checking basic voltage
