New Beetle L4-1.8L Turbo (AWP) (2003)
Oxygen Sensor: Testing and Inspection
With Manufacturer's Scan Tool
Oxygen Sensor And Oxygen Sensor Control After Three Way Catalytic Converter (TWC), Checking
NOTE:
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Raise vehicle to reach oxygen sensor connector.
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Only gold terminals may be used for servicing terminals 3 and 4 in connector for oxygen sensor.
Special tools, test equipment and auxiliary items
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VAG 1551 scan tool or VAG 1552 mobile scan tool with VAG 1551/3B cable
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VAG 1598/31 test box
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VAG 1526 hand multimeter or VAG 1715 multimeter
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VAG 1594 adapter set
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Electrical Wiring Diagram
Test conditions
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All fuses must be OK
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Battery voltage must be at least 11.5 V.
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Exhaust system between Three Way Catalytic Converter (TWC) and cylinder head must be free of leaks
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Engine Coolant Temperature (ECT) must be at least 80 °C, see display group 04, display zone 3
Functional check
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Connect VAG 1551 scan tool ((VAG 1552). Start engine and select "Address word" 01 of ECM. 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 1551 Scan
Tool
Indicated on display
Rapid data transfer
HELP
Select function XX
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Press buttons -0- and -8- for function "Read measured value block" and confirm entry with -Q- button.
Indicated on display
Read measuring value block
Input display group number XXX
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Press buttons -0-, -3- and -0- for "Display group number 30" and confirm entry with -Q- button.
Indicated on display (1 to 2 = Display zones)
Read measuring value block 30
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