Golf GLS L4-2.0L (AVH) (2002)
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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 and Oxygen Sensor Control After Catalyst, Checking
NOTE:
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Raise vehicle to reach Oxygen sensor connector.
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Only gold contacts may be used for servicing contacts 3 and 4 in connector for Oxygen sensor.
Special tools and equipment
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V.A.G 1551 scan tool or or 1552 scan tool with cable VAG 1551/3
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Test box VAG 1598/31
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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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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 80°C, See display group 04, display zone 3.
Functional check
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Connect V.A.G 1551 scan tool ((VAG1552). Start engine and select "Address word" 01 of engine control module. When doing this the engine