Passat L4-1.8L Turbo (AWM) (2004)
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Check wire between test box and 6-pin connector for open circuit according to wiring diagram.
Terminal 4 + socket 5
Wire resistance: max: 1.5 ohms
Continued for all vehicles
If no malfunctions are found in wires:
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Replace Engine Control Module (ECM)
Oxygen Sensor Heater For O2 Sensors Behind (TWC), Checking
Oxygen Sensor Heater For Oxygen Sensors Behind Three Way Catalytic Converter (TWC), Checking
NOTE: When servicing terminals in harness connector of Heated Oxygen Sensor (HO2S), use only gold-plated terminals.
Recommended special tools and equipment
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V.A.G 1526 portable multimeter or V.A.G 1715 multimeter
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V.A.G 1594 connector test kit
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Wiring diagram
Test requirements
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The respective fuses of Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130- must be OK:
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Ignition switched off.
Vehicles with engine code AEB