New Beetle GLS L4-2.0L (AZG) (2002)
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Check wires between test box and 4-pin connector (to control module) for open circuit according to wiring diagram.
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Terminal 3 + socket 68
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Terminal 4 + socket 69
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Wire resistance: max. 1.5 Ohms
Continuation for all vehicles
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Also check wires for short circuit to B+ and Ground (GND). Specified value: Infinite Ohms
If no malfunctions are found in wires:
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Replace Motronic Engine Control Module (ECM) -J220-.
With Manufacturer Scan Tool
Oxygen Sensor And Sensor Control After Catalyst, Checking
NOTE:
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Raise vehicle to reach oxygen sensor connector.
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Only gold-plated terminals must be used to repair the terminals 3 and 4 in the connector for the oxygen sensor.
Special tools and equipment
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Scan tool VAG 1551 or vehicle system tester V.A.G 1552 with cable VAG 1551/3B
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Test box V.A.G 1598/31
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Hand multimeter V.A.G 1526 or multimeter V.A.G 1715
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Adapter set V.A.G 1594
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Wiring diagram
Check conditions
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All fuses must be OK
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The battery voltage must be at least 11.5 V.
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Exhaust system between catalyst and cylinder head must be free of leaks
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Coolant temperature must be at least 85 °C, see display group 04, display zone 3