Cabrio GLX L4-2.0L (ABA) (2001)
Oxygen Sensor: Testing and Inspection
Oxygen Sensor / Control Before Converter, Checking
Oxygen Sensor And Oxygen Sensor Control Before Three Way Catalytic (TWC) Converter, Checking
Special tools and equipment
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VAG 1551 Scan Tool or VAG 1552 with cable
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VAG 1551/3
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Test box VAG 1598/22
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Hand multimeter VAG 1526 or multimeter VAG 1715
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Adapter set VAG 1594
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Wiring diagram
Check conditions
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Coolant temperature must be at least 80 degree C, see display group 04, display zone 3.
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Exhaust system between catalytic converter and cylinder head must be free of leaks
Functional check
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Connect VAG 1551 Scan Tool ((VAG 1552). Start engine and select "Address word" 01 of engine control module. When doing this engine must
be running at idle speed. (Connecting scan tool and selecting engine control module See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/With Manufacturer's Scan
Tool/Connecting VAG Scan Tool 1551/1552).
Indicated on display
Rapid data transfer
HELP
Select function XX
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Press keys 0 and 8 for function "Read Measuring Value Block" and confirm entry with Q key.
Indicated on display
Read Measuring Value Block
HELP
Input display group number XXX
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Press keys 0, 3 and 0 for "Display group number 30" and confirm entry with Q key.
Indicated on display: (1 to 4 Display zones)
Read Measuring Value Block 30
->
1
2
3
4
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Check Oxygen sensor control status before catalytic converter (display zone 1):
Specification: 1 1 1
If the specification is not obtained:
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Check Heated Oxygen Sensor (HO2S) before catalytic converter. See: Heated Oxygen Sensor (HO2S) -G39- Before Converter, Checking
Significance of 3 digit number block in display zone 1:
If the specification is obtained:
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Change to display group 32 as follows:
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Press C key.