Golf GL L4-2.0L (AEG) (2001)
Vehicles with engine code AEG
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Check wires between test box and 4-pin connector (to control module) for open circuit according to wiring diagram.
Terminal 3 + socket 51
Terminal 4 + socket 52
Wire resistance: max: 1.5 Ohms
Vehicles with engine code AVH, AZG
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Check wires between test box and 4-pin connector (to control module) for open circuit according to wiring diagram.
Terminal 3 + socket 68
Terminal 4 + socket 69
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's Scan Tool
Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC), checking
NOTE: Only gold plated contacts must be used to repair terminals 3 and 4 in the oxygen sensor harness connectors.
Special tools and equipment